Synthesis of Uridine 5′-(<scp>L</scp>-Arabinofuranosyl pyrophosphate) and the Structure of the UDP-<scp>L</scp>-arabinose Formed in Plants from UDP-α-<scp>D</scp>-xylopyranose

Abstract

Uridine 5′-(L-arabinofuranosyl pyrophosphate) and uridine 5′-(β-L-arabinopyranosyl pyrophosphate) have been synthesized chemically and compared with the UDP-L-arabinose formed from UDP-α-D-xylopyranose and UDP-α-D-glucuronic acid by plant particulate fractions. It is concluded that the product of enzymic reaction has a pyranose ring structure.