KEGG Orthology (KO) [BR:ko00001] 09100 Metabolism 09104 Nucleotide metabolism 00230 Purine metabolism [PATH:ko00230] K00942 gmk, GUK1; guanylate kinase [EC:2.7.4.8] Enzymes [BR:ko01000] 2. Transferases 2.7 Transferring phosphorus-containing groups 2.7.4 Phosphotransferases with a phosphate group as acceptor 2.7.4.8 guanylate kinase K00942 gmk, GUK1; guanylate kinase [EC:2.7.4.8]