Abbreviations: PK, pyruvate kinase; G6PD, glucose-6-phosphate dehydrogenase; P5N, pyrimidine 5'-nucleotidase; AK, adenylate kinase; LDH, lactate dehydrogenase; AchE, acetylcholinesterase; G3PD, glyceraldehyde-3-phosphate dehydrogenase; GPI, glucose phosphate isomerase; PFK, phosphofructokinase; GR, glutathione reductase; ADA, adenosine deaminase; PGK, phosphoglycerate kinase; MPGM, monophosphoglyceromutase; 6PGD, 6-phosphogluconic dehydrogenase.