Category: vitamin
Aliases: Vitamin B7, Vitamin H, D-Biotin
Covalently attached to the four mammalian carboxylases (pyruvate carboxylase, acetyl-CoA carboxylase, propionyl-CoA carboxylase, methylcrotonyl-CoA carboxylase) via holocarboxylase synthetase. Carries CO₂ during carboxylation reactions central to gluconeogenesis, fatty-acid synthesis, and amino-acid catabolism. Produced by gut microbiota — deficiency rare outside of raw-egg-white consumption (avidin binding) or biotinidase deficiency.
PO: 2h