Searching for Enyzme Commission number 2.7.1.21 (Thymidine kinase.) by Reannotation, by TIGRFam, by KEGG ortholog group, by SEED annotation, or by best hit in MetaCyc

Match by KEGG's EC number for 2.7.1.21

Gene ID	Gene Name	KO	KO Description	Genome	Fitness
b1238	tdk	K00857	thymidine kinase	Escherichia coli BW25113	strong

Or search for '2.7.1.21' in Escherichia coli BW25113 using Curated BLAST