XXIII.—On acetyl- and nitro-derivatives of alizarin
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Crystalline Acetyl Derivatives of Pepsin
Crystalline pepsin has been acetylated by the action of ketene in aqueous solution at pH 4.07-5.5. As acetylation proceeds the activity decreases, the decrease being more rapid at pH 5.0-5.5 than at 4.0-4.5. Three acetyl derivatives have been isolated from the reaction mixture and obtained in crystalline form. The crystal form of these derivatives is similar to that of pepsin. Fractionation and...
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ژورنال
عنوان ژورنال: J. Chem. Soc.
سال: 1876
ISSN: 0368-1769
DOI: 10.1039/js8763000578