Absorption Spectra of Proteins

Abstract

IN a recent communication¹, Prof. F. Haurowitz and Dr. T. Astrup describe observations of absorption spectra on solutions of native and digested serum globulin, which are said to be in better accord with the classical theory of the structure of proteins than with the cyclol hypothesis. They reason that because, after digestion of serum globulin with trypsin to a stage at which only a fine opalescence is given with sulphosalicylic acid, there is no increased absorption at λ 240 mµ, there has therefore been no formation of CO groups from >C(OH)–N< groups which are required by the cyclol hypothesis.