Hexokinase, Lyophilized, Recombinant Reference: LS002515 A lyophilized powder. Phosphohexose isomerase, 6-phosphogluconate dehydrogenase, adenylate kinase and creatine phosphokinase contaminant activities are 0.10%, 0.005%, 0.005% and 0.005%, respectively. Store at -20°C.