citric acid cycle

DL-Isocitric acid trisodium salt is the protonated form of isocitrate, a substrate in the citric acid cycle. It is useful as a marker for determining the composition of isocitrates in fruit products, including fruit juices.

Coenzyme A is an obligatory cofactor in all living cells synthesized from pantothenate (Vitamin B5), adenosine triphosphate (ATP), and cysteine.

NAD+ (β-Nicotinamide Adenine Dinucleotide) is a coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrophosphate linkage. It is found widely in nature and is involved in numerous enzymatic reactions in which it serves as an electron carrier by being alternately oxidized (NAD+) and reduced (NADH).

(S)-Malic acid ((S)-2-Hydroxysuccinic acid) is a tart-tasting organic dicarboxylic acid found in many sour foods, such as apples, and contributes to the sourness of green apples and tartness of wine, although its concentration decreases with fruit ripeness (wikipedia). In its ionized form, it is called malate, an intermediate in the TCA cycle alongside fumarate, and can be formed from pyruvate through anaplerotic reactions. In humans, malic acid is derived from food sources and synthesized in the body via the citric acid cycle in mitochondria, playing a crucial role in energy production under both aerobic and anaerobic conditions. Under aerobic conditions, malate is oxidized to oxaloacetate, providing reducing equivalents via the malate-aspartate redox shuttle, while during anaerobic conditions, its simultaneous reduction to succinate and oxidation to oxaloacetate removes excess reducing equivalents, reversing hypoxia's inhibition of glycolysis and energy production. Studies on rats have shown that tissue malate depletes following exhaustive physical activity, suggesting that malic acid deficiency may cause physical exhaustion. Administering malic acid to rats has been shown to elevate mitochondrial malate, increasing mitochondrial respiration and energy production.

Oxaloacetic acid, also known as oxosuccinic acid or oxalacetic acid, is a four-carbon dicarboxylic acid appearing as an intermediate of the citric acid cycle. In vivo, oxaloacetate (the ionized form of oxaloacetic acid) is formed by the oxidation of L-mal

2-Oxobutanoic acid (alpha-Ketobutyric Acid) is a product of the lysis of cystathionine. It is also one of the degradation products of threonine. It can be converted into propionyl-CoA, and thus enter the citric acid cycle.

2-Methylpentanedioic acid (alpha-Methylglutarate) is an organic acid normally found in human urine, in healthy adults and children. 2-Methylpentanedioic acid (alpha-Methylglutarate) is a metabolite of succinic acid, a citric acid cycle intermediate.

NADH disodium salt (Disodium NADH) hydrate is the reduced form of nicotinamide adenine dinucleotide (NAD) that can donate electrons in a reducing reaction, becoming oxidized to produce NAD+. Various enzymes utilize NADH disodium salt hydrate plus H+ to reduce substrates, generating NAD+ and the reduced product.

D-(+)-Malic acid ((R)-Malic acid) is a dicarboxylic acid that is made by all living organisms. Malic acid has two stereoisomeric forms (L- and D-enantiomers). The malate anion is an intermediate in the citric acid cycle.

Succinyl-Coenzyme A sodium salt(Succinyl-CoA sodium salt) participates in the citric acid cycle, where it is converted to succinic acid.Succinyl-Coenzyme A (sodium salt) is involved in a variety of metabolic reactions in living organisms, and plays an important role in the body.Succinyl-Coenzyme A (sodium salt) is involved in heme synthesis. Succinyl-Coenzyme A (sodium salt) is involved in the synthesis of hemoglobin and is used in the study of metabolic, neurological, and hematological disorders caused by nutritional vitamin B12 deficiency, which results in a deficiency in Succinyl-Coenzyme A synthesis.

Isocitric acid (Isocitrate), an isomer of citric acid, is a substrate for citric acid cycle and an endogenous metabolite, which has potential for the treatment of Parkinson’s disease, Fe-deficiency anemia, and metabolic myopathies associated with a shortage of succinate dehydrogenase and aconitate hydratase, as well as the mutation of the gene of NADP-dependent isocitrate dehydrogenase 1 (IDH1).

(Z)-Aconitic acid is the cis-isomer of Aconitic acid.is an intermediate in the tricarboxylic acid cycle produced by the dehydration of citric acid.

(S)-Malic acid (Standard) is the standard substance of (S)-Malic acid, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. (S)-Malic acid ((S)-2-Hydroxysuccinic acid) is a tart-tasting organic dicarboxylic acid that plays a role in many sour or tart foods. Apples contain malic acid, which contributes to the sourness of a green apple. Malic acid can make a wine taste tart, although the amount decreases with increasing fruit ripeness. (wikipedia). In its ionized form malic acid is called malate. Malate is an intermediate of the TCA cycle along with fumarate. It can also be formed from pyruvate as one of the anaplerotic reactions. In humans, malic acid is both derived from food sources and synthesized in the body through the citric acid cycle or Krebs cycle which takes place in the mitochondria. Malate's importance to the production of energy in the body during both aerobic and anaerobic conditions is well established. Under aerobic conditions, the oxidation of malate to oxaloacetate provides reducing equivalents to the mitochondria through the malate-aspartate redox shuttle. During anaerobic conditions, where a buildup of excess of reducing equivalents inhibits glycolysis, malic acid's simultaneous reduction to succinate and oxidation to oxaloacetate is capable of removing the accumulating reducing equivalents. This allows malic acid to reverse hypoxia's inhibition of glycolysis and energy production. In studies on rats it has been found that only tissue malate is depleted following exhaustive physical activity. Other key metabolites from the citric acid cycle needed for energy production were found to be unchanged. Because of this, a deficiency of malic acid has been hypothesized to be a major cause of physical exhaustion. Notably, the administration of malic acid to rats has been shown to elevate mitochondrial malate and increase mitochondrial respiration and energy production.

Trimethyl phosphate (Standard) is the standard substance of Trimethyl phosphate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. NADH disodium salt hydrate is a coenzyme of oxidoreductase. NADH acts as a regenerative electron donor during catabolic processes including glycolysis, the citric acid cycle and beta-oxidation.

Stigmatellin is an antibiotic derived from the cell mass of the myxobacterium, effective against yeasts (yeasts), filamentous fungi (filamentous fungi), and several Gram-positive bacteria (Gram-positive bacteria). Additionally, it serves as a potent inhibitor of photosynthetic electron (photosynthetic electron) transfer. Stigmatellin utilizes various sugars, polysaccharides, and acids from the citric acid cycle as substrates, inhibiting RNA and protein synthesis. It has two different inhibitory sites: one located on the reducing side of photosystem II and the other at the cytochrome b6 f complex. Stigmatellin holds potential for use in antimicrobial and photosynthesis research.