biotin

Biotin (Vitamin H) is a water-soluble B-vitamin and is necessary for cell growth, the production of fatty acids, and the metabolism of fats and amino acids.

Biotin sulfone is a natural metabolite of biotin.

D-Desthiobiotin is a biotin derivative used in affinity chromatography and protein chromatography, as well as for protein and cell labeling, detection, and separation.

3-Hydroxyisovaleric acid (Beta-Hydroxyisovaleric acid) is an endogenous metabolite excreted in the urine and can serve as an early and sensitive indicator of biotin deficiency.

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.

3-Hydroxyisovalerylcarnitine is a carnitine derivative that may serve as a novel biomarker for biotin deficiency in humans, with its concentration increasing in such conditions. Biotin deficiency reduces the activity of biotin-dependent 3-methylcrotonyl-CoA carboxylase, hindering the conversion of 3-methylcrotonyl-CoA into 3-methylglutaconyl-CoA, and impairing the leucine catabolism pathway, resulting in elevated plasma 3-Hydroxyisovalerylcarnitine concentrations [1].

Melanin is a multifunctional biotin and a powerful cation chelator with antimicrobial, antioxidant and antiradiation activities.

Streptavidin is a protein tetramer purified from bacteria with a very high affinity for biotin and is commonly used for the purification or detection of various biomolecules. Streptavidin is immunologically active, inhibiting IL-2 synthesis and CD25 expression in T cells.