NCIt definition : Human ADA wild-type allele is located within 20q12-q13.11 and is approximately 32
kb in length. This allele, which encodes adenosine deaminase protein, is involved
in the hydrolysis of adenosine to inosine. Certain allelic variants of the ADA gene
are associated with adenosine deaminase deficiency which, in some cases, causes autosomal
recessive severe combined immunodeficiency.;