Abstract
Summary
Our previous results, demonstrating with crude trypsin the digestibility of B. megaterium and the non-digestibility of B. cereus, could be confirmed with crystalline trypsin only by pretreating the bacteria with fat solvents or by adding lipase to it. The surface of B. cereus is different from that of B. megaterium; a lipid material can be removed from the surface of the later one which renders the bacterial protoplasts accessible to the action of proteolytic enzymes.
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