Write the function of adenosine deaminase enzyme. State the cause of ADA deficiency in humans. Mention a possible cure for a ADA deficiency patient.

Adenosine deaminase enzyme is a very important enzyme which is for the functioning of immune system.Cause: ADA deficiency is due to deletion of the gene for adenosine deaminase.Cure: The possible permanent cure is gene therapy where lymphocytes from the blood of the patients are grown in a culture outside the body. Then functional ADA is introduced into these lymphocytes which are then introduced into the patient.