Optical Rotatory Power and Dispersion of Proteins

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Abstract
The rotatory powers of lipin-free serum albumin, pseudoglobulin, euglobulin, lactalbumin, egg albumin, caseinogen, and gelatin for different wave-lengths have been determined. Extracted serum albumin, pseudoglobulin, and euglobulin have different and distinct rotatory powers. Euglobulin is not a mechanicial complex of pseudoglobulin andlipin. Serum albumin, egg albumin, and lactalbumin have rotatory dispersions dominated by an absorption band at about 2760 A. U. Serum globulins, caseinogen, and gelatin have different rotatory dispersions from the albumins. Extraction of lipins from proteins results in a considerable increase of rotatory power, but crystallized and non-crystalline serum albumins have practically identical properties.