2.5.1.51 beta-(1-Pyrazolyl)alanine synthase, beta-pyrazolealanine synthase, beta-pyrazolylalanine synthase (acetylserine), BPA-synthase, Pyrazolealanine synthase, pyrazolylalaninase, synthase, pyrazolealanine - - 2.5.1.51 EC 4.2.99.14, EC 4.2.99.17 formerly -