biocytin

ε-N-Biotinyl-l-lysine; biotin condensed through its carboxyl group with the ε-amino group of a lysyl residue in the apoenzymes to which biotin is the coenzyme; the predominant linkage in which biotin is found. SYN: biotinyllysine.

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bi·o·cy·tin -'sīt-ən n a colorless crystalline peptide C₁₆H₂₈N₄O₄S occurring naturally (as in yeast) and yielding biotin and lysine on hydrolysis

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bio·cy·tin (bi″o-siґtin) biotin in amide linkage with the ε-amino group of lysine, as occurs in the holoenzymes for which biotin is the coenzyme.