KEGG Orthology (KO) [BR:psa00001] 09100 Metabolism 09104 Nucleotide metabolism 00230 Purine metabolism [PATH:psa00230] PST_0461 gmk; guanylate kinase K00942 gmk; guanylate kinase [EC:2.7.4.8] Enzymes [BR:psa01000] 2. Transferases 2.7 Transferring phosphorus-containing groups 2.7.4 Phosphotransferases with a phosphate group as acceptor 2.7.4.8 guanylate kinase PST_0461 gmk; guanylate kinase K00942 gmk; guanylate kinase [EC:2.7.4.8]