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- W1972033818 abstract "A solid-phase assay for the activity of CMPNeuAc:Gal β1-4GlcNAc-R α-2,6-sialyltransferase (2,6ST) has been developed. In the assay an acceptor glycoprotein is immobilized onto microtiter plate wells. The two glycoprotein acceptors used were asialofetuin (ASF), which contains oligosaccharides terminating in the sequence Gal β1-4GlcNAc-R, and a neoglycoprotein of bovine serum albumin containing covalently attached Gal β1-4GlcNAc-R units. Samples containing the donor CMPNeuAc and the 2,6ST were incubated with the immobilized acceptor to generate the product NeuAc α2-6Gal β1-4GlcNAc-R. The product was detected by a biotin-streptavidin system using the biotinylated plant lectin Sambucus nigra agglutinin (SNA), which binds to sialic acid in α-2,6, but not in α-2,3, linkage. The biotinylated SNA bound to the product was then detected with streptavidin and biotinylated forms of either alkaline phosphatase or the recombinant bioluminescent protein aequorin. The assay was optimized with respect to the commercially available 2,6ST and shown to be dependent on the concentration of acceptor and CMPNeuAc and proportional to the 2,6ST activity in the range of 20 to 400 μU in a 1-h assay. The solid-phase assay also allows for the selective detection of 2,6ST activity in human and fetal bovine serum, where the activity was proportional in the range of 0.1 to 2 μl of serum." @default.
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- W1972033818 date "1992-11-01" @default.
- W1972033818 modified "2023-09-27" @default.
- W1972033818 title "A solid-phase assay for the activity of CMPNeuAc:Gal β1-4GlcNAc-R α-2,6-sialyltransferase" @default.
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- W1972033818 doi "https://doi.org/10.1016/0003-2697(92)90389-o" @default.
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