Figure 4.

Feedback Inhibition on Glycan Activation Pathways. The Figure shows the known biosynthetic pathways relating to the formation and recycling/salvage of monosaccharides found in glycans. The nucleotide sugars are the end products of each pathway and are shown in red e.g., UDP-Glc. The individual reactions, which are subject to feedback inhibition, are shown with a red arrow, →. The individual monosaccharides found in glycan structures, and which are activated to the nucleotide sugars through the metabolic pathways, are shown in blue e.g., Glc. The black text and black arrows show the intermediate monosaccharides on the pathways and their conversion steps in the pathways. Abbreviations are as listed at the end of the paper.