galactosyldiacylglycerol alpha-2,3-sialyltransferase activity (Q22321891)
Catalysis of the reaction: 1,2-diacyl-3-beta-D-galactosyl-sn-glycerol + CMP-N-acetyl-beta-neuraminate = 1,2-diacyl-3-[3-(alpha-D-N-acetylneuraminyl)-beta-D-galactosyl]-sn-glycerol + CMP + H(+).
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aliases CMP-N-acetylneuraminate:1,2-diacyl-3-beta-D-galactosyl-sn-glycerol N-acetylneuraminyltransferase activity
GO:0047289
description Catalysis of the reaction: 1,2-diacyl-3-beta-D-galactosyl-sn-glycerol + CMP-N-acetyl-beta-neuraminate = 1,2-diacyl-3-[3-(alpha-D-N-acetylneuraminyl)-beta-D-galactosyl]-sn-glycerol + CMP + H(+).

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