sulphide

L-Cysteine (L-(+)-Cysteine) is a non-essential sulfur-containing amino acid in humans. L-Cysteine is important for protein synthesis, detoxification, and diverse metabolic functions. Found in beta-keratin, the main protein in nails, skin, and hair, L-Cysteine is important in collagen production, as well as skin elasticity and texture. Also required in the manufacture of amino acid taurine, L-Cysteine is a component of the antioxidant glutathione, and plays a role in the metabolism of essential biochemicals such as coenzyme A, heparin, and biotin.

Dibutylsulfide is an organic sulphur compound commonly used as a building block in organic synthesis and in biochemical experiments and drug synthesis research.

N,N'-Diacetyl-L-cystine (DiNAC) is the disulphide dimer of N-acetylcysteine with immunomodulating properties. N,N'-diacetyl-L-cystine also has antiatherosclerotic effects in Watanabe-heritable hyperlipidemic rabbit (WHHL) rabbits. N,N'-diacetyl-L-cystine is also an effective and orally active modulator of contact sensitivity/delayed-type hypersensitivity reactions in rodents.

Itaconic acid is a precursor for the synthesis of polymers, chemicals, and fuels, and has anti-inflammatory activity.Itaconic acid can be synthesized by fungi. It is also a macrophage-specific metabolite. It mediates crosstalk between macrophage metabolism and peritoneal tumors.

L-Cysteine hydrochloride hydrate (L-Cysteine hydrochloride monohydrate) is a conditionally essential amino acid, which acts as a precursor for biologically active molecules such as hydrogen sulphide (H2S), taurine and glutathione. L-Cysteine hydrochloride hydrate suppresses ghrelin and reduces appetite in rodents and humans.

Otenaproxesul (ATB 346) is a novel hydrogen sulphide-releasing derivative of naproxen with markedly reduced toxicity.

Adenosine 5'-phosphosulfate (sodium salt) (APS) is a key intermediate in sulphur metabolism and a substrate for adenosine 5'-phosphosulfate kinase (APSK), which metabolises it into the high-energy sulphide donor PAPS (3'-phosphoadenosine-5'-phosphosulfate).