Searching for Enyzme Commission number 1.7.99.4 (Nitrate reductase.) by Reannotation, by TIGRFam, by KEGG ortholog group, by SEED annotation, or by best hit in MetaCyc

Match by SEED's EC number for 1.7.99.4

Gene ID	Gene Name	Seed Annotation	Genome	Fitness
ABZR88_RS14815		Assimilatory nitrate reductase large subunit (EC:1.7.99.4)	Mucilaginibacter yixingensis YX-36 DSM 26809	cofit
ABZR88_RS16935		Assimilatory nitrate reductase large subunit (EC:1.7.99.4)	Mucilaginibacter yixingensis YX-36 DSM 26809	strong

Or search for '1.7.99.4' in Mucilaginibacter yixingensis YX-36 DSM 26809 using Curated BLAST