4.1.1.57 pyridoxal 5'-phosphate - 748128 4.1.1.57 pyridoxal 5'-phosphate 0.1 mM: 100% activity, 0.001 mM: 50.4% activity, 0.00001 mM: 30.4% activity. No pyridoxal 5'-phosphate added: 22% activity 651387 4.1.1.57 pyridoxal 5'-phosphate coenzyme 4723, 4725 4.1.1.57 pyridoxal 5'-phosphate stimulates 4720, 4721