Composite of a silver-stained SDS-17.5% acrylamide gel (A) and the corresponding Western blots with monoclonal antibodies 4G5 (B) and 3F7 (C). The gel contains LOS samples from M. catarrhalis wild-type 7169 (lanes 1), 7169::lgt2KM (lanes 2), 7169::lgt2KM(REV) (lanes 3), 7169::lgt1KB (lanes 4), 7169::lgt1KB(REV) (lanes 5), 7169::lgt3KH (lanes 6), and 7169::lgt3KH(REV) (lanes 7). PAGE, polyacrylamide gel electrophoresis.