title: Gangliosides of human, bovine, and rabbit plasma.
abstract: Gangliosides were isolated from human, bovine, and rabbit plasma and were quantified by gas-liquid chromatography. Purification was achieved by sequential use of partitioning in solvents, DEAE-Sephadex chromatography, base treatment, and silicic acid chromatography. Human and bovine plasma yielded slightly more than 1 micro mole of lipid-bound sialic acid/100 ml; for rabbit plasma the value was 0.28 micro mole/100 ml. The total bovine plasma ganglioside fraction contained equal amounts of N-acetylneuraminic and N-glycolylneuraminic acids, rabbit plasma gangliosides had about 1% of the latter, and the human plasma sample contained only the former. Thin-layer chromatography revealed important differences among the plasmas from the three species, but all possessed hematosides and hexosamine-containing gangliosides. The approximate ratios of these two categories, based on sialic acid content, were (hematosides: hexosamine-type): human, 2:1; rabbit, 3:2; and bovine, 2:3. The fatty acid compositions of both categories were characteristic of extraneural gangliosides and included six major acids: palmitic, stearic, behenic, tricosanoic, lignoceric, and nervonic. The major long-chain base in each sample was sphingosine, while only a trace of the C(20) isomer was detected.
mesh_terms: D000818:Animals; D002417:Cattle; D002845:Chromatography; D002848:Chromatography, DEAE-Cellulose; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D005227:Fatty Acids / Q000032:analysis; D005732:Gangliosides / Q000097:blood*; D006801:Humans; D009438:Neuraminic Acids / Q000032:analysis / Q000302:isolation & purification; D009439:Neuraminidase / Q000032:analysis; D011817:Rabbits; D013045:Species Specificity
chemical_list: D005227:Fatty Acids; D005732:Gangliosides; D009438:Neuraminic Acids; D009439:Neuraminidase