Guanosine pyrophosphate , isolation

Uronic acid derivatives are also known among the guanosine 5 -pyrophosphate esters. A mixture of the a-D-mannopyranosyluronic acid ester (20) and, presumably, the /J-L-gulopyranosyluronic acid ester (21) was isolated from the brown alga Fucus gardneri,88 The conversion of the uronic acid in the ester 20 into D-mannitol, and that... 

Among the deoxyhexosyl esters of guanosine 5 -pyrophosphate, the most common is the /3-L-fucopyranosyl ester 22. It was isolated from extracts of Aerobacter aerogenes,90 milk,91 mammary gland,76 and blood cells,48 and was considered of probable occurrence in higher plants also (compare Ref. 92). 

The ester (25) of guanosine 5 -pyrophosphate with 3,6-dideoxy-/3-L-xj/lo-hexopyranose (colitose) was isolated from an extract of... 

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