Homologs of Rru_A1146 from Rhodospirillum rubrum S1H
5-aminolevulinic acid synthase (NCBI)
SEED: 5-aminolevulinate synthase (EC 2.3.1.37)
KEGG: 5-aminolevulinate synthase
Top 100 hits from BLASTp (E < 0.01)
Or try PaperBLAST, fast.genomics, the ENIGMA genome browser, or the comparative fitness browser