Word: pepsin
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Dates: during 1940-1949
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Fellow biochemists were sure he would have some news last week. He did. He has been working with enzymes, the chemical substances found in the body and in plants, that act like catalysts (e.g., pepsin in the stomach). Previously, he had isolated eight of eleven enzymes that cause fermentation, then devoted his time to studying just one of them, an enzyme he called zymohexase. He found that the blood of rats with cancer contains more zymohexase than that of normal rats, and that the larger the tumor, the greater the amount of the enzyme...