Anomeric compositions

By analysis of the products with glucose oxidase, it was shown that the anomeric composition of the glucose liberated from glucose-6-phos-phate by the enzymes acid or alkaline phosphatase or by glucose-6-phosphatase from rat liver was essentially the same as that of the substrate, thus indicating a lack of anomeric specificity for these enzymes also (106). 

P. J. Garegg and I. Kvamstrom, The orthoester glycosylation method. Variations in the anomeric composition of the product with aglycone basicity in the two step procedure, Acta Chem. Scand. B, 30 (1976) 655-658. 

From a study of the P n.m.r. spectra of phosphoribosyl diphosphate in the presence of magnesium ions, it has been deduced that the mono- and pyrophosphate residues act as independent binding sites for these ions. The anomeric composition and mutarotation rate of fructose 1,6-bisphosphate has been determined by P n.m.r., and it has also been observed that magnesium and zinc ions bind preferentially to the 1-phosphoryl group when it is in the a-ano-meric position. ... 

The n.m.r. spectra and anomeric compositions of ketohexose phosphates in solution are discussed in Chapter 20. A phosphoric ester having the properties of fructose 2,6-diphosphate was formed by mixing 85% phosphoric acid with 0.2 volumes of 1.8 M fructose 6-phosphate at 0°C. The syntheses of F -moraprenyl-/ -(o -L-rhamnopyranosyl-(l 3 )-a-D-galactopyranosyl)pyrophos-phate and P -moraprenyl-/ -( 3-D-mannopyranosyl-(l 4)-a-L-rhamnopyranosyl-(13)-a-D-galactopyranosyl)pyrophosphate have been described. Moraprenyl... 

The anomeric compositions of ketohexose phosphates and their conformations in solution have been investigated by n.m.r. spectra. The a 8 ratio for D-fructose 6-phosphate was found to be 19 81 for D-fructose 1-phosphate,... 

Low-melting hygroscopic cryst. Bpo 3 83-88°. [a]g-76 (c, 2 in EtOH). Anomeric composition not determined. 

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