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SDS–PAGE analysis of porins and LPS preparations from Salmonella typhimurium. Lane A, molecular weight standards (phosphorylase b, 94 000; albumin, 67 000; ovalbumin, 43 000; carbonic anydrase, 30 000; trypsin inhibitor, 20 100; α-lactalbumina, 14 000). Lane B, SH5014 porins. Lane C, SH5014 LPS-R. Lane D, 74 NCTC LPS.
