activation of prohistidine decarboxylase ( pi 6 ) from lactobacillus 30a proceeds by an intramolecular , ph- and monovalent cation-dependent reaction in which its constituent pi chains are cleaved nonhydrolytically between ser-81 and ser-82 with loss of nh3 and conversion of ser-82 to the pyruvoyl residue of active histidine decarboxylase ( alpha beta ) 6 .
C0007054
decarboxylase
C0019605
histidine decarboxylase