Homologs of Rru_A2082 from Rhodospirillum rubrum S1H
Hemerythrin HHE cation binding region (NCBI)
SEED: hemerythrin-like metal-binding protein
76 hits from BLASTp (E < 0.01)
Or try PaperBLAST, fast.genomics, the ENIGMA genome browser, or the comparative fitness browser