Thus, D glucose in aqueous solution exists as an equilibrium mixture of 5 compounds. The pyranose form predominates in solution.

aD glucofuranose (0.5%)

aD-glucopyranose (37%)

aldehydo- -glucose (0.003%)

bD-glucofuranose (0.5%)

bD-glucopyranose (62%)

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The predominant hexokinase isozyme of liver is hexokinase IV (glucokinase) and it is GLUT2 dependent

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Hexokinase IV is not inhibited by glucose 6-phosphate, and it can therefore continue to operate 

when the accumulation of glucose 6-phosphate completely inhibits hexokinases I–III. 

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