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E. coli LPS profiles. Purified LPS on SDS-PAGE gels was silver stained as described in Materials and Methods. Lane 1, MG1655 Strr; lane 2, MD42; lanes 3 to 5, SDS-sensitive revertants isolated from SDS-resistant MD42 mm5; lanes 6 to 8, individual SDS-resistant MD42 mm clones; lane 9, waaG::aacC1 mutant of F470; lane 10, waaP::aacC1 mutant of F470; lane 11, waaQ::aacC1 mutant of F470; lane 12, wild-type F470.
