Abstract
We found that the lipid bases of the small intestines of fasted rats differed from those of other tissues by the presence of a fraction that moved more slowly than C 18-dihydrosphingosine on thin-layer (TL) chromatograms in the solvent mixture of Sambasivarao and McCluer (1963). Observations which will be described in this report leave little doubt that this fraction consists, at least predominantly, of C 18-phytosphingosine. The occurrence of phytosphingosine in sphingolipids of some human tissues, e. g. of hair, and in the ceramide hexosides of kidney has been observed (Karlsson 1964, Michalec and Kolman 1966, Karlsson and Mårtensson 1968). Phytosphingosine was not found in the sphingomyelin fraction of human kidney.
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