You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is True about Hb dissociation curve: and explain in detail?
Oxygen-hemoglobin dissociation curve is shifted to right in the following conditions: 

Decrease in partial pressure of oxygen.
 Increase in partial pressure of carbon dioxide (Bohr effect).
Increase in hydrogen ion concentration and decrease in pH (acidity). 
Increased body temperature. 
Excess of 2,3-diphosphoglycerate (DPG) in RBC. It is also called 2,3-biphosphoglycerate (BPG). DPG is a byproduct in Embden-Meyer-hof pathway of carbohydrate metabolism. It combines with β-chains of hemoglobin. In conditions like muscular exercise and in high attitude, the DPG increases in RBC. So, the oxygen-hemoglobin dissociation curve shifts to right to a great extent.