Abstract
Spore coat protein of Bacillus subtilis was purified by electrophoretic elution procedure. Solubilized coat protein components were separated on SDS-PAGE and the desired protein was recovered from the gel pieces under the optimal condition examined. Two purified polypeptides with molecular weights of about 40 kDa were obtained; each of them was in very closed size on SDS-PAGE, both retaining antigenic activity against anti-spore coat protein serum on immunoblot analysis. The N-terminal 23 and 30 amino acid sequences of them were determined, and they were not identical to each other and also not homologous in the sequences of coat proteins previously reported.
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