Cysteine sulfenic acid (-SOH) intermediate
Proton acceptor; for phosphorylation activity. Proton donor; for dephosphorylation activity
Schiff-base intermediate with substrate; via pyruvic acid
Schiff-base intermediate with D-ribose 5-phosphate
2-(S-cysteinyl)pyruvic acid O-phosphothioketal
Proton acceptor; for processing activity
S-adenosylmethionine decarboxylase alpha chain
S-adenosylmethionine decarboxylase beta chain