Searching for Enyzme Commission number 1.3.99.1 (Succinate dehydrogenase.) by Reannotation, by TIGRFam, by KEGG ortholog group, by SEED annotation, or by best hit in MetaCyc

Match by KEGG's EC number for 1.3.99.1

Gene ID	Gene Name	KO	KO Description	Genome	Fitness
b0723	sdhA	K00239	succinate dehydrogenase flavoprotein subunit	Escherichia coli BW25113	strong
b0724	sdhB	K00240	succinate dehydrogenase iron-sulfur protein	Escherichia coli BW25113	strong
b4153	frdB	K00245	fumarate reductase iron-sulfur protein	Escherichia coli BW25113	strong
b4154	frdA	K00244	fumarate reductase flavoprotein subunit	Escherichia coli BW25113	strong

Or search for '1.3.99.1' in Escherichia coli BW25113 using Curated BLAST