... EC 2.5.1.49
O-acetylhomoserine aminocarboxypropyltransferase
EC 2.5.1.50 zeatin 9-aminocarboxyethyltransferase
EC 2.5.1.51 β-pyrazolylalanine synthase
EC 2.5.1.52 L-mimosine synthase
EC 2.5.1.53 uracilylalanine synthase...
http://www.chem.qmul.ac.uk/iubmb/enzyme/EC2/cont2bb.html