Abstract
IT has previously been observed by many workers that the phospholipid fractions from several animal tissues contain unidentified bases in addition to choline, ethanolamine, or serine. Recently, Rhodes and Lee1 showed the existence of a small amount of threonine in the phospholipids of hen's egg. We have also found threonine in the hydrolysate of the so-called cephalin fraction, obtained from the muscle of a tunny, Thynnus orientalis2. From this fraction we prepared dinitrophenyl derivatives, from which a small amount of a phospholipid containing dinitrophenylthreonine was obtained, besides considerable quantities of lipids containing dinitrophenylserine and dinitrophenylethanolamine, by means of chroma-tographic separation on a silicic acid/‘Celite’ column. These substances have been identified by chromatographic methods, periodate oxidation, and analytical results.
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References
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IGARASHI, H., ZAMA, K. & KATADA, M. Presence of a Threonine-containing Phospholipid in Tunny Muscle. Nature 181, 1282–1283 (1958). https://doi.org/10.1038/1811282a0
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DOI: https://doi.org/10.1038/1811282a0
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