Letter | Published:

Effect of Neutral Salts on the Structure of Collagen and Gelatin


IN a current project in this laboratory, the optical rotatory properties of aqueous solutions of gelatin and soluble collagen from three different species of vertebrates have been examined in the absence and presence of lithium bromide. Results (Table 1) are in general agreement with the earlier work of Carpenter and Lovelace on bovine gelatin1. It will be observed that, although striking changes occur in the specific rotations of collagen and gelatin in the presence and absence of salt, the value of λc (obtained from the slopes of linear Drude plots of λ2[α] vs. [α]) changes only slightly and, if anything, may decrease somewhat.

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