Searching for Enyzme Commission number 6.3.4.21 (unknown) by Reannotation, by TIGRFam, by KEGG ortholog group, by SEED annotation, or by best hit in MetaCyc

Match by TIGRFam's EC number for 6.3.4.21

Gene ID	Gene Name	Description	Genome	Domain ID	Fitness
SMc02276		nicotinate phosphoribosyltransferase	Sinorhizobium meliloti 1021	TIGR01514	sig.

Or search for '6.3.4.21' in Sinorhizobium meliloti 1021 using Curated BLAST