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- Holgersson, J, et al.
(författare)
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Blood group A glycolipid antigen biosynthesis: discrimination between biosynthesized and enzyme preparation derived blood group A antigen by mass spectrometry.
- 1990
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Ingår i: Analytical biochemistry. - 0003-2697. ; 184:1, s. 145-50
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Tidskriftsartikel (refereegranskat)abstract
- A monofucosyl type 1 chain blood group A hexaglycosylceramide was biosynthesized in solution using the type 1 chain blood group H pentaglycosylceramide as precursor, a crude microsomal fraction prepared from the mucosa scraping of a blood group A pig small intestine as enzyme source, and uridine diphosphate-N-acetyl-(1-14C)galactosamine as sugar donor. The radioactive product was enriched using reversed-phase column chromatography and silica gel HPLC. The peak, as detected by a beta-flow scintillation counter, was collected, permethylated, and analyzed by mass spectrometry. Carbohydrate sequence ions were found, indicating the presence of both the biosynthesized and a native, non-14C-containing blood group A hexaglycosylceramide. The blood group A pig small intestinal mucosa used as the enzyme source contain blood group A hexaglycosylceramide as the predominant glycolipid. Therefore, it is concluded that the nonradioactive blood group A hexaglycosylceramide found after the biosynthesis is derived from the enzyme preparation.
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