Answer:
E. It increases the affinity of hemoglobin for oxygen.
Explanation:
2,3-bisphosphoglycerate is a acid This is three carbon isomer of glycolytic.
The important about 2,3-bisphosphoglycerate
1. 2,3-bisphosphoglycerate binds at a distance from the heme groups of hemoglobin.
2. 2,3-bisphosphoglycerate is an allosteric modulator.
3. 2,3-bisphosphoglycerate is normally found associated with the hemoglobin extracted from red blood cells.
4. 2,3-bisphosphoglycerate binds with lower affinity to fetal hemoglobin than to adult hemoglobin .
So the option E is correct.