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The abilities of two bacterial active heme transporters, HmbR of Neisseria meningitidis and HemR of Yersinia enterocolitica, to use different heme sources were compared. While HmbR-expressing cells used only hemoglobin (Hb) and heme, HemR-expressing bacteria were able to grow on Hb, heme, myoglobin, hemopexin, catalase, human and bovine serum albumin-heme,(More)
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