adenosine deaminase
n 1: an enzyme found in mammals that can catalyze the
deamination of adenosine into inosine and ammonia; "ADA
deficiency can lead to one form of severe combined
immunodeficiency disease"; "the gene encoding ADA was one
of the earlier human genes to be isolated and cloned for
study" [syn: {adenosine deaminase}, {ADA}]