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SDS–10% PAGE analysis of 250-μg portions of whole-culture dried powders of B. sphaericus 2362 (lane 1), IAB-59 (lane 2), IAB-872 (lane 3), and IAB-881 (lane 4). The gel was stained with Coomassie blue. Broad-range molecular weight standards (lane MW) were obtained from New England BioLabs. The arrows labeled BinB and BinA indicate the 56- and 42-kDa polypeptides of the binary toxins, respectively.
