The enzyme pyrazolylalanine synthase () catalyzes the chemical reaction
This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this enzyme class is <small>L</small>-serine hydro-lyase [adding pyrazole 3-(pyrazol-1-yl)-<small>L</small>-alanine-forming]. Other names in common use include ò-pyrazolylalaninase, ò-(1-pyrazolyl)alanine synthase, and <small>L</small>-serine hydro-lyase (adding pyrazole). It employs one cofactor, pyridoxal phosphate.