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SDS-PAGE analysis of EPS produced by OP and TR strains. EPS samples were diluted twofold in electrophoresis sample buffer. Equal volumes were analyzed by SDS-PAGE and stained with Stains-All. The 5% polyacrylamide or “stacking” portion of the gel is shown. Two independent preparations from each strain were examined. Lanes: 1 and 2, BB22OP; 3 and 4, BB22TR; 5 and 6, LM5093; 7 and 8, fivefold dilution of BB22OP.
