l-malic acid

(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.

1. Malic acid (Pomalus acid) did reduce populations of L. monocytogenes on poultry. 2. Malic acid supplementation may be useful for conservative treatment of calcium renal stone disease by virtue of its capacity to induce these effects.

L-Tartaric acid ((2R,3R)-(+)-Tartaric acid) occurs naturally in many plants, particularly grapes and tamarinds, and is one of the main acids found in wine. It is used as an antioxidant. Salts of tartaric acid are known as tartrates. L-Tartaric acid is a muscle toxin, which works by inhibiting the production of malic acid, and in high doses causes paralysis and death.

L-Aspartic acid (Aspatofort) is a non-essential amino acid in humans, L-Aspartic acid has an overall negative charge and plays an important role in the synthesis of other amino acids and in the citric acid and urea cycles. Asparagine, arginine, lysine, methionine, isoleucine, and some nucleotides are synthesized from aspartic acid. L-Aspartic acid also serves as a neurotransmitter.

L-Lactic acid ((S)-2-Hydroxypropanoic acid) is a natural product produced by the anaerobic glycolysis of pyruvic acid. L-Lactic acid is a sensitive indicator of tissue hypoxia and can be used as a hemodynamic indicator in critically ill patients.

L-Cysteic acid monohydrate (3-Sulfo-L-alanine Monohydrate) is an oxidation product of L-cysteine that may be used as a competitive inhibitor of the bacterial aspartate: alanine antiporter (AspT) exchange of aspartate and in other aspartate biological systems. L-Cysteic acid monohydrate is used in monomeric surfactant development. L-Cysteic acid monohydrate may be used in studies of excitatory amino acids in the brain, such as those that bind to cysteine sulfinic acid receptors. It is a useful agonist at several rat metabotropic glutamate receptors (mGluRs).

L-aspartic acid potasium salt（VX-548） is an amino acid widely found in plants and animals.L-aspartic acid potasium salt drives the production of nitrogen oxides, which promotes phagocytosis and contributes to fish survival.L-aspartic acid potasium salt may stimulate antibiotics. The stimulatory effect may be related to precursors involved in aspartic acid-4-semialdehyde biosynthesis.

3-O-Ethyl-L-ascorbic acid is a cosmetic tyrosinase inhibitor with whitening ability and is a stabilized vitamin C derivative. It also has antioxidant properties.

L-Pyroglutamic acid (pidolic acid), a cyclized derivative of the L-GLUTAMIC ACID, can elevate blood levels. This function may be associated with problems of GLUTATHIONE or GLUTAMINE metabolism.

L-Ascorbic acid 2-phosphate trisodium (Sodium ascorbyl phosphate) is utilized in biocatalytic dephosphorylation for electric power generation and electrochemical detection assays.

DL-Malic acid (Hydroxybutanedioic acid) is a dicarboxylic acid found in fruits such as apples and pears. It plays a role in many sour or acidic foods.

L-Glutamic acid monosodium salt (MSG) (Monosodium glutamate) is an activator of mGlu1 receptor.

L-Ascorbic acid (Vitamin C) is a natural product that is a potent reducing agent and antioxidant. L-Ascorbic acid functions in fighting bacterial infections, in detoxifying reactions, and in the formation of collagen. L-Ascorbic acid is used in the treatment of scurvy.

L-Pipecolic acid (L-Homoproline) is a breakdown product of lysine, accumulates in body fluids of infants with generalized genetic peroxisomal disorders, such as Zellweger syndrome, neonatal adrenoleukodystrophy.

N-Acetyl-L-glutamic acid (Ac-L-Glu-OH) (NAcGlu) is an acetylated amino acid. NAcGlu is biosynthesized from glutamic acid and acetyl-CoA by the enzyme N-acetyl glutamate synthase (NAGS). NAcGlu activates carbamoyl phosphate synthetase in the urea cycle. A deficiency in N-acetyl glutamate synthase or a genetic mutation in the gene coding for the enzyme will lead to urea cycle failure in which ammonia is not converted to urea, but rather accumulated in the blood leading to the condition called Type I hyperammonemia.

L-Azetidine-2-carboxylic acid ((2S)-azetidine-2-carboxylic acid) is a toxic proline analogue produced by members of the Liliaceae and Agavaciae families.

L-Ascorbic acid sodium salt (Vitamin C sodium salt) is a more bioavailable form of vitamin C that is an alternative to taking ascorbic acid as a supplement.

L-2-Phosphoglyceric acid (L-2-Phosphoglyceric acid disodium salt) is a glyceric acid which serves as the substrate in the ninth step of glycolysis. It is catalyzed by enolase into phosphoenolpyruvate (PEP), the penultimate step in the conversion of glucose to pyruvate.

Ellagic acid 3-O-α-L-rhamnopyranoside is a natural product found in the tuberous roots of [Potentilla anserina].

L-Chicoric Acid (trans-Caffeoyltartaric acid) has been shown to inhibit hyaluronidase and HIV-1 integrase, and to possess phagoeytosis stimulatory activity in vitro and in vivo and antiviral acitivy. L-Chicoric acid may reduce acute alcohol-induced steatosis in mice through interfering with the induction of iNOS and iNOS-dependent signaling cascades in the liver. 3. L-Chicoric acid inhibited cell viability and induced apoptosis in 3T3-L1 preadipocytes which was characterized by chromatin condensation and poly ADP-ribose-polymerase (PARP) cleavage.

L-Aspartic Acid 4-Benzyl Ester is a chelating agent that forms stable complexes with metal ions. It has been used to study the effect of metal ions on enzyme activity and to investigate the role of metal ions in the regulation of gene expression.

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.

L-Aspartic acid sodium is a natural product for research related to life sciences. The catalog number is T65270 and the CAS number is 5598-53-8.

L-2-Phosphoglyceric acid disodium salt is a glyceric acid which serves as the substrate in glycolysis. It is catalyzed by enolase into phosphoenolpyruvate.

L-Cysteinesulfinic acid is a potent agonist at several rat metabotropic glutamate receptors [mGluRs, pEC50s of 3.92±0.03, 4.6±0.2, 3.9±0.2, 2.7±0.2, 4.0±0.2, and 3.94±0.08 for mGluR1, mGluR5, mGluR2, mGluR4, mGluR6, and mGluR8, respectively].

L-Glyceric acid sodium, a urinary metabolite, is predominantly found in individuals with the rare inherited metabolic disorder L-glyceric aciduria. This compound is a diagnostic tool for identifying primary hyperoxaluria type 2 (PH2) and distinguishing it from primary hyperoxaluria type 1 (PH1) based on its excretion pattern.

β-Citryl-L-glutamic acid (β-Citrylglutamic acid) is a type of citryl glutamic acid that can be isolated from the brains of neonatal rats.

L-Diguluronic acid, a linear polysaccharide copolymer consisting of two L-guluronic acid (G) units, serves as a precursor for Alginate[1], a categorically unbranched polyanionic polysaccharide. Alginate finds application in the development of antifungal agent delivery carriers[2].

L-octaguluronic acid, derived from seaweed, is a constituent of alginates [natural biopolymers].

Lucidenic acid L is a natural product for research related to life sciences. The catalog number is TN4458 and the CAS number is 110267-45-3.

Malic acid 4-Me ester is a natural product for research related to life sciences. The catalog number is TN4487 and the CAS number is 66178-02-7.

3-O-methylellagic acid 4'-O-alpha-L-rhamnopyranoside is a natural product for research related to life sciences. The catalog number is TN6494 and the CAS number is 51768-39-9.

Quinovic acid 3-O-alpha-L-rhamnopyranoside shows significant inhibitory activity against snake venom phosphodiesterase-I.

L-Glutamic acid (Glutaminol) acts as an excitatory transmitter, shows a direct activating effect on the release of DA from dopaminergic terminals.

L-2-Hydroxyglutaric acid, an epigenetic modifier and potential oncometabolite in renal cancer, impedes mitochondrial creatine kinase (Mi-CK) activity, exhibiting Km and Ki values of 2.52 mM and 11.13 mM, respectively. Additionally, it obstructs histone demethylases, thereby encouraging histone methylation.

2-O-β-D-Glucopyranosyl-L-ascorbic acid (AA-2βG), isolated from Lycium Fruit, is a stable vitamin C analog with anti-tumor activity.

L-heptaguluronic acid, derived from seaweed, is a constituent of alginates, which are natural biopolymers.

L-Dihydroorotic acid, also known as (S)-4,5-dihydroorotate or dihydro-L-orotate, belongs to the class of organic compounds known as alpha amino acids and derivatives. Within the cell, L-dihydroorotic acid is primarily located in the cytoplasm and mitochon

Ellagic acid 4-O-α-L-arabinopyranoside, extracted from Dimocarpus longan Lour. (syn. Euphoria longan Lam.), exhibits antioxidative activity [1].

N-Acetyl-L-aspartic acid is a derivative of aspartic acid, synthesized in neurons from the amino acid aspartic acid and acetyl coenzyme A. N-Acetyl-L-aspartic acid has antioxidant activity.

Oleanolic acid 3-O-beta-D-glucosyl-(1->3)-alpha-L-rhamnosyl(1->2)-alpha-L-arabinoside is a natural product

L-Ascorbic acid 6-stearate, a compound derived from L-ascorbic acid and stearic acid identified in K. coccinea, exhibits antioxidant and anticancer properties. It effectively scavenges DPPH radicals in cell-free assays (IC50 = 3.31 µg/ml). Additionally, lipid nanoparticles (LNPs) containing L-ascorbic acid 6-stearate have been shown to trigger apoptosis in HL-60 promyeloblasts at a concentration of 190 µM. This compound is also incorporated into cosmetic and personal care product formulations due to its beneficial effects.

Ganoderic acid L is a natural product from the fruiting body of the fungus Ganoderma lucidum (Reishi).

N-Carbamoyl-L-aspartic acid, an intermediate in pyrimidine metabolism, can be utilized to measure the enzyme activity of dihydroorotase (DHOse) [1] [2].