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  • Title: Long chain base and fatty acid compositions of equine kidney sphingolipids.
    Author: Hara A, Taketomi T.
    Journal: J Biochem; 1975 Sep; 78(3):527-36. PubMed ID: 818074.
    Abstract:
    Equine renal glycopshingolipids were composed of galactocerebroside, glucocerbroside, ceramide dihexoside, ceramide trihexoside, sulfatide, globoside I, Forssman globoside, and hematoside. Free ceramide and sphingomyelin were also found in equine kidney. Their long chain bases consisted of sphingosine, dihydrosphingosine, C18-phytosphingosine, and C20-phytosphingosine, whereas the fatty acids were separated into two groups: nonhydroxy and hydroxy fatty acids. Ceramide monohexoside was separated into five spots by TLC on borax-impregnated plates. The major component of ceramide monohexoside was glucocerbroside which accounted for 46.6% of the total ceramide monohexoside and contained a ceramide consisting of phytosphingosines and hydroxy fatty acids. The long chain bases of hematoside and sulfatide contained dihydroxy and trihydroxy bases in nearly equal ratios. On the other hand, the other glycosphingolipids contained mainly dihydroxy bases, though with significant amounts of trihydroxy bases. Free ceramides were separated into four groups by silicic acid column chromatography and the major ceramides were of two kinds, consisting of dihydroxy bases and nonhydroxy fatty acids (49.9% of the total ceramide) and of trihydroxy bases and nonhydroxy fatty acids (38.5% of the total ceramide). The minor ceramides contained predominantly hydroxy fatty acids. Neither trihydroxy bases nor hydroxy fatty acids were detected in spingomyelin.
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