Expand the name of enzyme ADA. Why is the enzyme essential for human body? Suggest a gene therapy for its deficiency.

ADA enzyme:

Ada means adenosine deaminase

Ada enzyme is essential in the human body:

The enzyme is synthesis only when the gene responsible for coding the enzyme present in the cell of the body. If the gene is not present in the body the same may be implanted in the body by genetic engineering. This is a kind of gene therapy. For this purpose the some lymphocyte cells of the diseased persons is taken out to multiply such cells artificially. After that the gene responsible for coding Ada is inserted into the lymphocyte cells and the lymphocyte cells carrying the implanted gene are inserted into the body of the diseased person. If this can be done in the embryonic stage then the body remain protected whole life.