Extended Data Fig. 7: Native mass spectrometry of OmcZ50 purified from E. coli shows molecular weight and heme groups consistent with native OmcZ50.
From: Structure of Geobacter cytochrome OmcZ identifies mechanism of nanowire assembly and conductivity
a, Coomassie and Heme staining gel of OmcZ50 purified from E. coli. b, Mass spectrum of OmcZ purified from G. sulfurreducens. Detected mass corresponds to the OmcZ monomer covalently bound to eight hemes. c-d, Mass spectrum of OmcZ50 purified from E. coli. Detected proteins exist as monomer and homodimer. Mass analysis shows that OmcZ50 monomer is bound covalently to primarily c, eight haems but sometimes also to d, six hemes.
