TRANSFERASE, STRUCTURAL GENOMICS CONSORTIUM (SGC), SINGLE NUCLEOTIDE POLYMORPHISM, SNP, MUTATION, ACETYLATION, ALLOSTERIC ENZYME, ALTERNATIVE SPLICING, GLYCOLYSIS, KINASE, MAGNESIUM, METAL- BINDING, PHOSPHOPROTEIN, POLYMORPHISM, PYRUVATE 3G2G S437Y MUTANT OF HUMAN MUSCLE PYRUVATE KINASE, ISOFORM M2