three analogs of phosphoenolpyruvic acid : ( z ) -phosphoenol-3-fluoropyruvate , ( z ) -phosphoenol-3-bromopyruvate and ( z ) -phosphoenol-alpha-ketobutyrate were found to be substrates for yeast pyruvate kinase ( atp : pyruvate ( z ) -o-phosphotransferase , ec 2.7.1.40 ) with maximal velocities much greater than those found for rabbit muscle pyruvate kinase .
C0034348
pyruvate kinase
C0031727
phosphotransferase