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An SDS-PAGE gel (7.5% polycrylamide) (panel 1) showing the OMP profile from M. catarrhalis 7169 grown under iron-replete (lane A) and iron-deficient (lane B) conditions. Panel 2 is the corresponding Western blot probed with MAb 11C6, which detects the presence of OMP B1, with an approximate molecular mass of 82 kDa (asterisk), in outer membranes of cells grown only under iron limitation (lane B). Molecular mass standards (left) are expressed in kilodaltons.
