Studies on Phospholipids:I. Comparative Analysis of Phospholipids from Mammalian Blood Stroma and Spleen

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  • MATSUMOTO MAKOTO
    the Department of Chemistry, Institute for Infectious Diseases, the University of Tokyo

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1. Phospholipids from erythrocyte stroma of human, cat, guinea pig, horse, rabbit, sheep, and cattle, together with the spleens of cattle and horse, were separated by chromatography on silicic acid column and compared with each other.<br> 2. The molar ratios of lecithin, cephalin, and their lyso derivatives were presented for each of the red cells and spleens. Results obtained by Bürger et al. and Turner et al. that red cells of ruminants contain little or no lecithin were also confirmed. Unexpectedly, a large amount of lyso derivatives was found in stroma lipids of human, cat, guinea pig, and cattle red cells.<br> 3. Spleens and red cells of horse and cattle showed no similarity in their phospholipid compositions.<br> 4. Inositol in red cells of sheep, cattle, horse, and human beings was found to be a minor component, the amount of which was in every case less than 0.3 per cent of that of total acetone-insoluble lipids. Ether-soluble phospholipids of horse and bovine spleens together with egg yolk contained an average 0.25 per cent of inositol.<br> The author wishes to acknowledge his great indebtedness to Prof. T. Yamakawa who made this work possible, and to Prof. T. Ukita for his constant encouragement. Thanks are also due to Miss Y. Natsume for her skilful assistance in technical work and to Miss M. Iwanaga for elementary analysis.

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