UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 3, Golgi apparatus
udpgal_g + acgalfuc12gal14acglcgalgluside_hs_g ⇌ h_g + galacgalfuc12gal14acglcgalgluside_hs_g + udp_g
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