COP1 is found in the nucleus in the dark and in the cytoplasm in the light. COP1 movement into the nucleus in the dark requires the COP9 signalosome (CSN) complex

#Id: 8083

#XL - T Zoology

#Id: 8082

#XL - T Zoology

#Id: 7853

#XL - T Zoology

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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#XL - T Zoology

The pyranose forms of the sugars are more stable than the furanose forms in solution.

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#XL - T Zoology

The 6-membered cyclic form of sugars is usually called the “pyranose” form in reference to the cyclic ether pyran.

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#XL - T Zoology

The pyranose form of glucose dominates (>99%) at equilibrium in aqueous solution