This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Which compound shifts the oxygen dissociation curve to the right? \nSelect and explain. \nA. 1-Phosphoglycerate, B. 2,3 DPG, C. 1,3 DPG, D. Gyceraldehyde', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Three important conditions affect the oxygen-hemoglobin dissociation curve: the pH, the temperature, and the concentration of 2,3-diphosphoglycerate(DPG; 2,3-DPG). A rise in temperature or a fall in pH shifts the curve to the right. When the curve is shifted in this direction, a higher pO2 is required for hemoglobin to bind a given amount of O2. Conversely, a fall in temperature or a rise in pH shifts the curve to the left, and a lower\xa0pO2 is required to bind a given amount of O2.\xa0\n2,3-DPG is very plentiful in red cells. It is formed from 3-phosphoglyceraldehyde, which is a product of glycolysis via the Embden-Meyerhof pathway. It is a highly charged anion that binds to the β chains of deoxyhemoglobin. One mole of deoxyhemoglobin binds 1 mol of 2,3-DPG. In effect,', 'role': 'assistant'}]