Peptidase_M15_4 domain-containing protein
Nucleophile; cysteine thiosulfonate intermediate
Arginine biosynthesis bifunctional protein ArgJ alpha chain
Arginine biosynthesis bifunctional protein ArgJ beta chain
Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity
Glyco_hydro_114 domain-containing protein
Nucleophile; for GTP cyclohydrolase activity
Proton acceptor; for GTP cyclohydrolase activity
Involved in ionization of N3 of dUMP, leading to its activation
Phosphocysteine intermediate; for EIIB activity
O-(5'-phospho-DNA)-tyrosine intermediate
Proton donor; for beta-elimination activity
Proton donor; for delta-elimination activity
Schiff-base intermediate with substrate; via pyruvic acid
Gly-cisPro motif, important for rejection of L-amino acids
Removed in mature form; by autocatalysis
Isoglutamyl lysine isopeptide (Gln-Lys) (interchain with K-? in acceptor proteins)