Red blood cells can contain a molecule called 2,3-bisphosphoglycerate (2,3-BPG). If 2,3-BPG binds to haemoglobin, a greater partial pressure of oxygen is required for haemoglobin to become 50% saturated with oxygen. Which of the following statements about the effect of 2,3-BPG are correct?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only