Die Acetylierung der Proteine des Blutes. VII. Mitteilung.

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Abstract
Reference is made to articles previously published which, it is asserted, prove that Emil Fischer''s theory of the protein molecule as being formed by long polypeptid chains can no longer be sustained. The proteins are heated with acetic acid and acetyl chloride, in some cases HBr being added to the acetic acid. From 40-50% of the N of the protein is separated as acetyl bases, which can be fractionated in petroleum ether, CS2, ether, and benzol. The first 3 fractions are appreciably volatile, notably in a high vacuum. Twenty-five % of the acetyl derivatives of globin can be distilled. The fractions are analyzed, and both the qualitative samples and the analyses suggest the existence of heterocyclic compounds.

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