The interconversion of dihydroxyacetone phosphate DHAP and g

The interconversion of dihydroxyacetone phosphate (DHAP) and glyceraldehyde-3-phosphate (G3P) is a part of both the glycolytic pathway and the Calvin cycle for photosynthetic carbon fixation dihydroxy acetonephosphate a glyceraldehyde 3 phosphate The value of AGo\' for this reaction is +1.8 kcal/mol at 250 C. In the glycolytic pathway, this reaction goes to the right, converting DHAP to G3P. In the Calvin cycle, this reaction proceeds to the left, converting G3P to DHAP

Solution

1. delta G value is positive, so the Keq (equlibrium constant) value is less than one.

2. delta G for spontaneous reaction is = -1.8, so the reaction proceed to left

3. G3P/DHAP =+1800+(1.987)(298) In (0.01) =+1800+592(-4.605) = -0.93 Kcal/mol

4. DHAP:G3P raio is -3000 = -1800+RTin