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List of results

• Glycerophosphate dehydrogenase Complex  + ('''Glycerophosphate dehydrogenase complex' … '''Glycerophosphate dehydrogenase complex''' (CGpDH) is a Complex of the electron transfer-pathway localized at the outer face of the mt-inner membrane. CGpDH is thus distinguished from cytosolic GpDH. CGpDH oxidizes [[glycerophosphate]] to dihydroxyacetone phosphate and feeds two electrons into the [[Q-junction]], thus linked to an [[Electron-transfer-pathway state|ET pathway level 3 control state]].[[Electron-transfer-pathway state|ET pathway level 3 control state]].)
• Glycerophosphate  + ('''Glycerophosphate''' (synonym: α-glycero … '''Glycerophosphate''' (synonym: α-glycerophosphate; glycerol-3-phosphate; C₃H₉O₆P) is an organophosphate and it is a component of glycerophospholipids. The mitochondrial [[Glycerophosphate dehydrogenase Complex]] oxidizes glycerophosphate to dihydroxyacetone phosphate and feeds electrons directly to ubiquinone.hate to dihydroxyacetone phosphate and feeds electrons directly to ubiquinone.)
• H2DCFDA  + ('''H2DCFDA''' (dichlorodihydrofluorescein … '''H2DCFDA''' (dichlorodihydrofluorescein diacetate) is a cell permeant fluorescent probe that has been used as an indicator of ROS presence. It is a reduced form of fluorescein that does not present fluorescence. After entry in the cell, it suffers deacetylation by intracellular esterases, and upon oxidation it is converted to dichlorofluorescein (excitation wavelength ~492–495 nm, emission ~517–527 nm). It may be oxidised by hydrogen peroxide, hydroxyl radical, hypochlorite anion, nitric oxide, peroxyl radical, peroxynitrite, singlet oxygen and superoxide. Has been used as a general indicator of ROS by fluorescence microscopy.dicator of ROS by fluorescence microscopy.)
• Harmonization  + ('''Harmonization''' is the process of minimizing redundant or conflicting [[standard]]s which may have evolved independently. To obtain a common basis in reaching a defined objective, critical [[requirement]]s are identified that need to be retained.)
• Harmonized European norm  + ('''Harmonized European norms''' are [[norm]]s valid for all members of the European Union. They are mandatory parts of the individual national collections of norms.)
• Harmonized SUIT protocols  + ('''Harmonized [[SUIT protocols]] … '''Harmonized [[SUIT protocols]]''' (H-SUIT) are designed to include [[cross-linked respiratory states]]. When performing harmonized SUIT protocols in parallel, measurements of cross-linked respiratory states can be statistically evaluated as replicates across protocols. Additional information is obtained on respiratory coupling and substrate control by including respiratory states that are not common (not cross-linked) across the harmonized protocols.s-linked) across the harmonized protocols.)
• Healthy ageing  + ('''Healthy ageing''': 'WHO has released th … '''Healthy ageing''': 'WHO has released the first World report on ageing and health, reviewing current knowledge and gaps and providing a public health framework for action. The report is built around a redefinition of healthy ageing that centres on the notion of functional ability: the combination of the intrinsic capacity of the individual, relevant environmental characteristics, and the interactions between the individual and these characteristics' (Beard 2016 The Lancet). characteristics' (Beard 2016 The Lancet).)
• Heat  + ('''Heat''' is a form of [[energy]] … '''Heat''' is a form of [[energy]] [J]. The relationship between heat and [[work]] provides the foundation of thermodynamics, which describes transformations from an initial to a final state of a system. In energy transformations heat may pass through the boundary of the system, at an external heat flow of d_e''Q''/d''t''.al heat flow of d_e''Q''/d''t''.)
• Heterothermy  + ('''Heterothermy''' is the variable regulat … '''Heterothermy''' is the variable regulation of body temperature in [[endothermy | endotherms]] which can change their body temperatures as levels of activity and environmental conditions dictate (e.g. hibernators). In '''regional heterothermy''', temperature gradients are present, e.g. between body core and extremeties.t, e.g. between body core and extremeties.)
• Homeothermy  + ('''Homeothermy''' is the stable regulation of body temperature in [[endothermy | endotherms]] by metabolic heat production and control of heat exchange with the environment, or in [[ectotherms]] by behavioural means to select a stable thermal environment.)
• Horseradish peroxidase  + ('''Horseradish peroxidase''' readily combines with hydrogen peroxide (H₂O₂) and the resultant [HRP-H₂O₂] complex can oxidize a wide variety of hydrogen donors.)
• Hydrogen sulfide  + ('''Hydrogen sulfide (H₂S)''' is involved in signaling and may have have further biological importance.)
• Hydron  + ('''Hydron''' is the general name for the cation H⁺ used without regard to the nuclear mass of the hydrogen entity (H is the hydro group), either for H in its natural abundance or without distinction between the isotopes.)
• Hydroxycinnamate  + ('''Hydroxycinnamate''' (alpha-cyano-4-hydr … '''Hydroxycinnamate''' (alpha-cyano-4-hydroxycinnamic acid) is an inhibitor of the [[pyruvate carrier]] (0.65 mM). Above 10 mM [[pyruvate]], hydroxycinnamate cannot inhibit respiration from pyruvate, since the weak pyruvic acid can pass the inner mt-membrane in non-dissociated form.inner mt-membrane in non-dissociated form.)
• Hydroxylamine  + ('''Hydroxylamine''' is an inhibitor of [[catalase]].)
• Hyperoxia  + ('''Hyperoxia''' is defined as environmenta … '''Hyperoxia''' is defined as environmental oxygen pressure above the [[normoxic]] reference level. Cellular and intracellular hyperoxia is imposed on isolated cells and isolated mitochondria at air-level oxygen pressures which are higher compared to cellular and intracellular oxygen pressures under tissue conditions in vivo. Hyperoxic conditions may impose oxidative stress and may increase maximum aerobic performance. may increase maximum aerobic performance.)
• Hyperthermia  + ('''Hyperthermia''' in [[endothermy | endotherms]] … '''Hyperthermia''' in [[endothermy | endotherms]] is a state of stressful up to lethal elevated body core temperature. In humans, the limit of hyperthermia (fever) is considered as >38.3 °C, compared to [[normothermia]] at a body temperature of 36.5 to 37.5 °C.[normothermia]] at a body temperature of 36.5 to 37.5 °C.)
• Hyphenation  + ('''Hyphenation''' is used to connect two w … '''Hyphenation''' is used to connect two words (compound words) or two parts of a word to clarify the meaning of a sentence. The same two words may be hyphenated or not depending on context. Hyphenation may present a problem when searching for a term such as '[[Steady state]]'. It is helpful to write 'steady-state measurement', to clarify that the measurement is performed at steady state, rather than implying that a state measurement is steady. But this does not imply that hyphenation is applied to the 'measurement performed at steady state'. Thus, the key word is '[[steady state]]'. Compound adjectives should be hyphenated (steady-state measurement), but if the compound adjective follows the term (measurement at steady state), hyphenation does not add any information and should be avoided. Find more examples and guidelines in the [https://www.grammarly.com/blog/hyphen/ grammarly blog on Hyphen] and in [https://apastyle.apa.org/learn/faqs/when-use-hyphen apastyle.apa.org].rn/faqs/when-use-hyphen apastyle.apa.org].)
• Hypothermia  + ('''Hypothermia''' in [[endothermy | endotherms]] … '''Hypothermia''' in [[endothermy | endotherms]] is a state of stressful up to lethal low body core temperature. In humans, the limit of hypothermia is considered as 35 °C, compared to [[normothermia]] at a body temperature of 36.5 to 37.5 °C. Hypothermia is classified as mild (32–35 °C), moderate (28–32 °C), severe (20–28 °C), and profound (<20 °C). severe (20–28 °C), and profound (<20 °C).)
• Hypoxia  + ('''Hypoxia''' (hypox) is defined in respir … '''Hypoxia''' (hypox) is defined in respiratory physiology as the state when insufficient O₂ is available for respiration, compared to ''environmental'' hypoxia defined as environmental oxygen pressures below the [[normoxic]] reference level. Three major categories of hypoxia are (''1'') environmental hypoxia, (''2'') physiological tissue hypoxia in hyperactivated states (e.g. at ''V''_O₂max) with intracellular oxygen demand/supply balance at steady state in tissues at environmental normoxia, compared to tissue normoxia in physiologically balanced states, and (''3'') pathological tissue hypoxia including ischemia and stroke, anaemia, chronic heart disease, chronic obstructive pulmonary disease, severe COVID-19, and obstructive sleep apnea. Pathological hypoxia leads to tissue hypoxia and heterogenous intracellular anoxia. Clinical oxygen treatment ('environmental hyperoxia') may not or only partially overcome pathological tissue hypoxia.al hyperoxia') may not or only partially overcome pathological tissue hypoxia.)
• ISO 10012:2003 Measurement management systems  + ('''ISO 10012:2003 Measurement management s … '''ISO 10012:2003 Measurement management systems — Requirements for measurement processes and measuring equipment''': An effective measurement management system ensures that measuring equipment and measurement processes are fit for their intended use and is important in achieving product quality objectives and managing the risk of incorrect measurement results. The objective of a measurement management system is to manage the risk that measuring equipment and measurement processes could produce incorrect results affecting the quality of an organization’s product. The methods used for the measurement management system range from basic equipment verification to the application of statistical techniques in the measurement process control.niques in the measurement process control.)
• ISO 13528:2015 Statistical methods for use in proficiency testing by interlaboratory comparison  + ('''ISO 13528:2015 Statistical methods for … '''ISO 13528:2015 Statistical methods for use in proficiency testing by interlaboratory comparison''': Proficiency testing involves the use of interlaboratory comparisons to determine the performance of participants (which may be laboratories, inspection bodies, or individuals) for specific tests or measurements, and to monitor their continuing performance. There are a number of typical purposes of proficiency testing [[ISO/IEC 17043 General requirements for proficiency testing |ISO/IEC 17043:2010]]. These include the evaluation of laboratory performance, the identification of problems in laboratories, establishing effectiveness and comparability of test or measurement methods, the provision of additional confidence to laboratory customers, validation of uncertainty claims, and the education of participating laboratories. The statistical design and analytical techniques applied must be appropriate for the stated purpose(s). be appropriate for the stated purpose(s).)
• ISO 15189:2012 Medical laboratories — Particular requirements for quality and competence  + ('''ISO 15189:2012 Medical laboratories — P … '''ISO 15189:2012 Medical laboratories — Particular requirements for quality and competence''': This International Standard is for use by medical laboratories in developing their quality management systems and assessing their own competence, and for use by accreditation bodies in confirming or recognising the competence of medical laboratories. While this International Standard is intended for use throughout the currently recognised disciplines of medical laboratory services, those working in other services and disciplines could also find it useful and appropriate.could also find it useful and appropriate.)
• ISO 17511:2003 In vitro diagnostic medical devices  + ('''ISO 17511:2003 In vitro diagnostic medi … '''ISO 17511:2003 In vitro diagnostic medical devices -- Measurement of quantities in biological samples -- Metrological traceability of values assigned to calibrators and control materials''': For measurements of quantities in laboratory medicine, it is essential that the quantity is adequately defined and that the results reported to the physicians or other health care personel and patients are adequately accurate (true and precise) to allow correct medical interpretation and comparability over time and space.ion and comparability over time and space.)
• ISO 9001:2015 Quality management systems - requirements  + ('''ISO 9001:2015 Quality management system … '''ISO 9001:2015 Quality management systems - requirements''': The adoption of a quality management system is a strategic decision for an organization that can help to improve its overall performance and provide a sound basis for sustainable development initiatives. Consistently meeting requirements and addressing future needs and expectations poses a challenge for organizations in an increasingly dynamic and complex environment. To achieve this objective, the organization might find it necessary to adopt various forms of improvement in addition to correction and continual improvement, such as breakthrough change, innovation and re-organization.gh change, innovation and re-organization.)

• ISO/IEC 17025:2005 Competence of testing and calibration laboratories  + ('''ISO/IEC 17025:2005 General requirements … '''ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories''': The use of this International Standard will facilitate cooperation between laboratories and other bodies, and assist in the exchange of information and experience, and in the harmonization of standards and procedures. This International Standard specifies the general requirements for the competence to carry out tests and/or calibrations, including sampling. It covers testing and calibration performed using standard methods, non-standard methods, and laboratory-developed methods.methods, and laboratory-developed methods.)
• ISO/IEC 17043:2010 General requirements for proficiency testing  + ('''ISO/IEC 17043:2010 Conformity assessmen … '''ISO/IEC 17043:2010 Conformity assessment — General requirements for proficiency testing''': The use of interlaboratory comparisons is increasing internationally. This International Standard provides a consistent basis to determine the competence of organizations that provide proficiency testing.izations that provide proficiency testing.)
• Iconic symbols  + ('''Iconic symbols''' are used in [[ergodynamics]] … '''Iconic symbols''' are used in [[ergodynamics]] to indicate more explicitely — compared to standard SI or IUPAC symbols — the quantity represented and some boundary conditions. This is particularly the case in normalized quantities (ratios of quantities). Iconic (or canonical) symbols help to clarify the meaning, are based on SI and IUPAC symbols as far as possible, and may be translated into more commonly used, practical symbols. Several ambiguities in SI and IUPAC symbols are eliminated by the systematic structure of iconic symbols, but it may be impossible to avoid all ambiguities, particulary when long (canonical) symbols are abbreviated in a particular context. Clarity is improved always by showing the unit of a quantity together with the symbol of the quantity. Iconic symbols cannot be identical with IUPAC symbols when a different definition is used — this would add to the confusion. For example, the IUPAC symbols ''n''_B [mol] and ''V''_B [m³] denote amount and volume of B. Consequently, it should be expected, that the symbol ''Q''_B indicates charge of B [C]. However, the IUPAC symbol ''Q''_B is used for particle charge per ion B [C·x^-1]. This prohibits a consistent definition of ''Q''_B as a potential iconic symbol for charge carried by a given quantity of ions B with unit [C], instead of particle charge per ion B with unit [C·x^-1]. Hence, the conventional ambigous system forces compatible iconic symbols to be more complicated, using ''Q''_elB [C] and ''Q''_{''<u>N</u>''B} [C·x^-1] to distinguish charge of B from charge per elementary B. ''Q''_{''<u>n</u>''B} [C·mol^-1] is charge per molar amount of B.'B</sub> [C·x^-1] to distinguish charge of B from charge per elementary B. ''Q''_{''<u>n</u>''B} [C·mol^-1] is charge per molar amount of B.)
• Impact factor  + ('''Impact factor''' is a measure of a scie … '''Impact factor''' is a measure of a scientific journal's citations per publication. The Journal Citation Reports, maintained by Clarivate Analytics, provides the calculated impact factors. The IF is frequently used as an indicator of a journal's importance or prestige, which is nowadays increasingly contested. which is nowadays increasingly contested.)
• Inorganic phosphate  + ('''Inorgnic phosphate''' (P_i) is a salt of phosphoric acid. In solution near physiological pH, the species HPO₄^2- and H₂PO₄^- dominate. ''See also'': [[Phosphate carrier]] (Pic).)
• Oxygen flux - instrumental background  + ('''Instrumental background oxygen flux''', … '''Instrumental background oxygen flux''', ''J''°_O₂, in a respirometer is due to oxygen consumption by the [[POS]], and oxygen diffusion into or out of the aqueous medium in the [[O2k-chamber]]. It is a property of the instrumental system, measured in the range of experimental oxygen levels by a standardized instrumental O₂ background test. The oxygen regime from air saturation towards zero oxygen is applied generally in experiments with isolated mitochondria, and living or permeabilized cells. To overcome oxygen diffusion limitation in permeabilized fibers and homogenates, an elevated oxygen regime is applied, requiring instrumental background test in the same range of elevated oxygen., requiring instrumental background test in the same range of elevated oxygen.)
• Integration time  + ('''Integration time''' is the time taken t … '''Integration time''' is the time taken to scan a single full range spectrum using [[photodiode arrays]]. It is equivalent to the exposure time for a camera. The shortest integration time defines the fastest response time of a [[spectrophotometer]]. Increasing the integration time increases the [[sensitivity]] of the device. The [[white balance]] or [[balance]] and subsequent measurements must always be carried out at the same integration time. carried out at the same integration time.)
• Internal-energy  + ('''Internal-energy''', ''U'' [J], can neit … '''Internal-energy''', ''U'' [J], can neither be destroyed nor created (first law of thermodynamics: d_i''U''/d''t'' = 0). Note that ''internal'' (subscript i), as opposed to ''external'' (subscript e), must be distinguished from "internal-energy", ''U'', which contrasts with "[[Helmholtz energy]]", ''A'', as [[enthalpy]], ''H'', contrasts with Gibbs energy, ''G''.[[enthalpy]], ''H'', contrasts with Gibbs energy, ''G''.)
• International oxygraph course  + ('''International Oxygraph Course''' (IOC), see [[O2k-Workshops]].)
• Ionomycin  + ('''Ionomycin''' (Imy) is a ionophore used to raise intracellular [Ca²⁺].)
• Isocitrate dehydrogenase  + ('''Isocitrate dehydrogenase''' forms 2-oxoglutarate from isocitrate in the [[TCA cycle]].)
• Isolated mitochondria  + ('''Isolated mitochondria''', imt, are mitochondria separated from a tissue or cells by breaking the plasma membranes and attachments to the cytoskeleton, followed by centrifugation steps to separate the mitochondria from other components.)
• Journal indexing  + ('''Journal indexing''' allows publications to be found on search tools/databases. Each database might have different criteria of inclusion.)
• Keywords-MitoPedia in BEC  + ('''Keywords—MitoPedia''' is the concept to … '''Keywords—MitoPedia''' is the concept to link keywords in articles published in [[Bioenergetics Communications]] (BEC) to [[MitoPedia]] terms. Authors should consider the message in the selected keywords. Provide consistent definitions of your keywords by linking them to MitoPedia. Extend MitoPedia entries critically by your contributions. The BEC editorial team will hyperlink your keywords with MitoPedia, and a reference to your BEC publication will be generated automatically from the MitoPedia term to your publication. With your contributions, BEC elevates keywords to terms with meaning. Your article gains visibility.th meaning. Your article gains visibility.)
• Kynurenine hydroxylase  + ('''Kynurenine hydroxylase''' (kynurenine 3 … '''Kynurenine hydroxylase''' (kynurenine 3-monooxygenase) is located in the outer mitochondrial membrane. Kynurenine hydroxylase catalyzes the chemical reaction: L-kynurenine + NADPH + H⁺ + O₂ ↔ 3-hydroxy-L-kynurenine + NADP⁺ + H₂O</br>Kynurenine hydroxylase belongs to the family of oxidoreductases acting on paired donors, with O₂ as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O₂ with [[NADH]] or [[NADPH]] as one donor, and incorporation of one atom of oxygen into the other donor. This enzyme participates in tryptophan metabolism. It employs one cofactor, [[FAD]].FAD]].)
• Laboratory titration sheet  + ('''Laboratory titration sheet''' contains … '''Laboratory titration sheet''' contains the sequential titrations in a specific Substrate-uncoupler-inhibitor titration (SUIT) protocol. The laboratory titration sheets for different SUIT protocols are incorporated in DatLab (DL7.1): [[Protocols in DatLab]][[Protocols in DatLab]])
• Lactate dehydrogenase  + ('''Lactate dehydrogenase''' is a glycolytic marker enzyme in the cytosol, regenerating NAD⁺ from NADH and pyruvate, forming lactate.)
• Length  + ('''Length''' ''l'' is an SI base quantity … '''Length''' ''l'' is an SI base quantity with SI base unit [[meter]] m. Quantities derived from length are [[area]] ''A'' [m²] and [[volume]] ''V'' [m³]. Length is an extensive quantity, increasing additively with the number of objects. The term 'height' ''h'' is used for length in cases of vertical position (see [[height of humans]]). Length of height per object, ''L''_{''U''_''X''} [m·x^-1] is length per unit-entity ''U''_''X'', in contrast to lentgth of a system, which may contain one or many entities, such as the length of a pipeline assembled from a number ''N''_''X'' of individual pipes. Length is a quantity linked to direct sensory, practical experience, as reflected in terms related to length: long/short (height: tall/small). Terms such as 'long/short distance' are then used by analogy in the context of the more abstract quantity [[time]] (long/short duration).[time]] (long/short duration).)
• Light-enhanced dark respiration  + ('''Light-enhanced dark respiration''' ''LE … '''Light-enhanced dark respiration''' ''LEDR'' is a sharp (negative) maximum of dark respiration in plants in response to illumination, measured immediately after switching off the light. ''LEDR'' is supported by respiratory substrates produced during photosynthesis and closely reflects light-enhanced [[photorespiration]] (Xue et al 1996). Based on this assumption, the total photosynthetic oxygen flux ''TP'' is calculated as the sum of the measured net photosynthetic oxygen flux ''NP'' plus the absolute value of ''LEDR''.'NP'' plus the absolute value of ''LEDR''.)
• Lightguides  + ('''Lightguides''' consist of optical fibre … '''Lightguides''' consist of optical fibres (either single or in bundles) that can be used to transmit light to a sample from a remote [[light source]] and similarly receive light from a sample and transmit it to a remote [[detector]]. They have greatly contributed to the range of applications that for which optical methods can be applied. This is particularly true in the fields of medicine and biology.rue in the fields of medicine and biology.)
• Linear phenomenological laws  + ('''Linear phenomenological laws''' are at … '''Linear phenomenological laws''' are at the core of the thermodynamics of irreversible processes TIP, considered to apply near equilibrium but more generally in transport processes (e.g. Fick's law). In TIP, linearity is discussed as the dependence of generalized flows ''I'' or fluxes ''J'' on generalized forces, ''J'' = -''L''·''F'', where ''L'' is expected to be constant (as a prerequisite for linearity) and must not be a function of the force ''F'' ([[affinity]]) for [[Onsager 1931 Phys Rev |Onsager reciprocity]] to apply. This paradigm is challenged by the [[ergodynamics |ergodynamic concept]] of fundamentally non-linear isomorphic flux-[[force]] relations and is replaced by the generalized isomorphic flux-[[pressure]] relations. Flows ''I'' [MU·s^-1] and forces ''F'' [J·MU^-1] are conjugated pairs, the product of which yields power, ''I''·''F'' = ''P'' [J·s^-1 = W]. Flux ''J'' is system-size specific flow, such that volume-specific flux times force yields volume-specific power, ''P''_''V'' = ''J''·''F'' [W·m^-3]. Then [[Vector |vectoral]] and [[Discontinuous system |vectorial]] transport processes are inherently non-linear flux-force relationships, with '''''L''''' = '''''u'''''·'''''c''''' in continuous transport processes along a gradient ('''''c''''' is the local concentration), or ''L'' = ''u''·''α'' (''α'' is the [[free activity]] in a discontinuous transport process across a semipermeable membrane) — formally not different from (isomorphic to) [[scalar]] chemical reactions.emical reactions.)
• Linearity  + ('''Linearity''' is the ability of the meth … '''Linearity''' is the ability of the method to produce test results that are proportional, either directly or by a well-defined mathematical transformation, to the concentration of the analyte in samples within a given range. This property is inherent in the [[Beer-Lambert law]] for [[absorbance]] alone, but deviations occur in [[scattering]] media. It is also a property of [[fluorescence]], but a [[fluorophore]] may not exhibit linearity, particularly over a large range of concentrations.arly over a large range of concentrations.)
• Luminescence  + ('''Luminescence''' is spontaneous emission … '''Luminescence''' is spontaneous emission of radiation from an electronically or vibrationally excited species not in thermal equilibrium with its environment (IUPC definition). An alternative definition is "Luminescence is emission of </br>light by a substance not resulting from heat." Luminescence comprises many different pehnomena. Luminescence from direct photoexcitation of the emitting species is called photoluminescence. Both [[fluorescence]] and [[phosphorescence]] are forms of photoluminescence. In biomedical research also forms of chemiluminescence (e.g.the luciferin reaction) are used. In chemiluminescence the emission of radiation results from a chemical reaction. For other forms of luminescence see [http://goldbook.iupac.org/L03641.html the IUPAC Gold Book].upac.org/L03641.html the IUPAC Gold Book].)
• Magnesium Green  + ('''Magnesium Green''' (MgG) is an [[extrinsic fluorophores|extrinsic fluorophore]] … '''Magnesium Green''' (MgG) is an [[extrinsic fluorophores|extrinsic fluorophore]] that fluoresces when bound to Mg²⁺ and is used for measuring mitochondrial ATP production by [[mitochondrial preparations]]. Determination of mitochondrial ATP production is based on the different dissociation constants of Mg²⁺ for [[ADP]] and [[ATP]], and the exchange of one ATP for one ADP across the mitochondrial inner membrane by the [[adenine nucleotide translocase]] (ANT). Using the dissociation constants for ADP-Mg²⁺ and ATP-Mg²⁺ and initial concentrations of ADP, ATP and Mg²⁺, the change in ATP concentration in the medium is calculated, which reflects mitochondrial ATP production. change in ATP concentration in the medium is calculated, which reflects mitochondrial ATP production.)
• Malic enzyme  + ('''Malic enzyme''' (ME; EC 1.1.1.40) catal … '''Malic enzyme''' (ME; EC 1.1.1.40) catalyzes the oxidative decarboxylation of L-malate to pyruvate with the concomitant reduction of the dinucleotide cofactor NAD⁺ or NADP⁺ and a requirement for divalent cations (Mg²⁺ or Mn²⁺) as cofactors.</br></br>NAD(P)⁺ + L-malate^2- <--> NAD(P)H + pyruvate^- + CO₂</br></br>Three groups of ME are distinguished (i) NAD⁺- and (ii) NADP⁺-dependent ME specific for NAD⁺ or NADP⁺, respectively, and (iii) NAD(P)⁺- dependent ME with dual specificity for NAD⁺ or NADP⁺ as cofactor. Three isoforms of ME have been identified in mammals: cytosolic NADP⁺-dependent ME (cNADP-ME or ME1), mitochondrial NAD(P)⁺-dependent ME (mtNAD-ME or ME2; with NAD⁺ or NADP⁺ as cofactor, preference for NAD⁺ under physiological conditions), and mitochondrial NADP⁺-dependent ME (mtNADP-ME or ME3). mtNAD-ME plays an important role in [[anaplerosis]] when glucose is limiting, particularly in heart and skeletal muscle. [[Tartronic acid]] (hydroxymalonic acid) is an inhibitor of ME.[[Tartronic acid]] (hydroxymalonic acid) is an inhibitor of ME.)