3d image of biotin skeletal formula

biotin vitamin b7 vitamin heterocyclic tetrahydrothiophene coenzyme carboxylase enzymes catabolism amino acids fatty gluconeogenesis biotinylation histone proteins nuclear chromatin gene expression dietary safety upplement biological activity bioactive nutrient prescription drug food additive nutraceutica metabolite metabolism biosynthesis cycle mechanism pathway biosynthetic intermediate biogenesis substrate precursor synthesis derivative bioprecursor metabolic enzyme endogenous contractor biotinidase absorption small intestine 3d