Schiff-base intermediate with acetaldehyde
Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity
O-(5'-phospho-DNA)-tyrosine intermediate
Fibrinogen C-terminal domain-containing protein
Schiff-base intermediate with substrate; via pyruvic acid
Proton acceptor; for glutaminase activity
Gly-cisPro motif, important for rejection of L-amino acids
Nucleophile; for GTP cyclohydrolase activity
Proton acceptor; for GTP cyclohydrolase activity
2-(S-cysteinyl)pyruvic acid O-phosphothioketal