Isoglutamyl lysine isopeptide (Gln-Lys) (interchain with K-? in acceptor proteins)
Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity
Cysteine sulfenic acid (-SOH) intermediate
O-(3'-phospho-DNA)-tyrosine intermediate
Schiff-base intermediate with substrate; via pyruvic acid
Peptidase_C39_2 domain-containing protein
Nucleophile; cysteine thiosulfonate intermediate