| 单词 |
sedoheptulose |
| 释义 |
Sedoheptulose
sedoheptulose[¦sē·dō′hep·tə‚lōs] (biochemistry) A seven-carbon ketose sugar widely distributed in plants of the Crassulaceae family; a significant intermediary compound in the cyclic regeneration ofD-ribulose. Sedoheptulose (also sedoheptose), C7Hl4O7, a monosaccharide of the ketoheptose group. Sedoheptulose exists in the optically active D-and L-forms and also occurs as the racemate. The D-form is widely distributed in nature. Sedoheptulose takes part in the biosynthesis of monosaccharides in the leaves of green plants during photosynthesis and in carbohydrate metabolism in animal organisms (pentose-phosphate cycle). sedoheptulose
se·do·hep·tu·lose (sē'dō-hep'tyū-lōs), A 2-ketoheptulose formed metabolically in the pentose monophosphate pathway as the 7-phosphate by condensation of d-xylulose 5-phosphate and d-ribose 5-phosphate, splitting out d-glyceraldehyde 3-phosphate; the unphosphorylated sugar is found naturally in Sedum (stonecrop). Synonym(s): d-altro-2-heptulose |
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