Guanosine diphosphate mannose, acid

In the cytosol, these monosaccharides can be phosphorylated and subsequently coupled with nucleotides such as uridine diphosphate (e.g., UDP-GlcNAc), guanosine diphosphate (e.g., GDP-mannose), or cytosine monophosphate in the case of sialic acids (Fig. 2b) to create a set of high energy building blocks for glycan assembly. In some cases, such as for the initial steps... 

Fig. 20.1. Abbreviated scheme of the synthesis of a diantennary N-glycan. Fucose modification has been omitted. 20.1, Phosphomannomutase 2 (PMM2) 20.2, phosphoman-nose isomerase (PMI) 20.3, glucosyltransferase I (GT I) 20.4, mannosyltransferase VI (MT VI) 20.5, dolichol phosphate-mannose synthase-1 (DPM synthase-1) 20.5, N-acet-ylglucosaminyltransferase II (GnT II) 20.7, glucosidase I (G I) GDP, guanosine diphosphate Marly mannose GlcNACy N-acetylglucosamine Do/, dolichol P, phosphate G/c, glucose Gal galactose SiUy sialic acid. Dotted arrow indicates multiple steps...

L-fucose, D-rhamnose GDP-D-mannuronic acid GDP-4-keto-6-deoxy-D-mannose P, P -Diguanosine tetraphosphate P, P -Diguanosine triphosphate Guanosine tetraphosphate Cytidine diphosphate-X CDP-D-glucose CDP-L-ribitol... 

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