Farlex Partner Medical Dictionary © Farlex 2012
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In plants, the most common substrate for transferring reaction is UDP-glucose (Lim et al., 2004).Typical donors of plant GTs are UDP-glucose (UDP-Glc), UDP-rhamnose (UDP-Rha), UDP-galactose (UDP-Gal), UDP-xylose (UDP-Xyl) and UDP-glucuronic acid (UDP-GlcUA).
HASes use cytosolic UDP-GlcUA and UDP-GlcNAc and are able to extrude the nascent polysaccharide chain through the plasma membrane into the ECM [21].
UDP-GlcUA derives from glucose-1-phosphate which is linked to UDP forming UDP-glucose in the irreversible reaction catalyzed by UDP-glucose pyrophosphorylase.