Homologs of SM_b20078 from Sinorhizobium meliloti 1021
response regulator
SEED: Nitrate/nitrite response regulator protein
KEGG: two-component system, NarL family, response regulator
Top 100 hits from BLASTp (E < 0.01)
Or try PaperBLAST, fast.genomics, the ENIGMA genome browser, or the comparative fitness browser