KEGG Orthology (KO) [BR:nzs00001] 09100 Metabolism 09104 Nucleotide metabolism 00240 Pyrimidine metabolism [PATH:nzs00240] SLY_0545 tdk; Thymidine kinase K00857 tdk; thymidine kinase [EC:2.7.1.21] Enzymes [BR:nzs01000] 2. Transferases 2.7 Transferring phosphorus-containing groups 2.7.1 Phosphotransferases with an alcohol group as acceptor 2.7.1.21 thymidine kinase SLY_0545 tdk; Thymidine kinase K00857 tdk; thymidine kinase [EC:2.7.1.21]