Homologs of BT0494 from Bacteroides thetaiotaomicron VPI-5482
protoporphyrin IX magnesium chelatase (NCBI ptt file)
SEED: CobN/magnesium chelatase family protein
73 hits from BLASTp (E < 0.01)
Or try PaperBLAST, fast.genomics, the ENIGMA genome browser, or the comparative fitness browser