NCIt definition : Human CD3D wild-type allele is located within 11q23 and is approximately 4 kb in length.
This allele, which encodes T-cell surface glycoprotein CD3 delta chain protein, plays
a role in the regulation of signal transduction underlying the developmental transition
of immature thymocytes to mature CD4 or CD8 T cells. Certain allelic variants of
the CD3D gene cause a form of severe combined immunodeficiency (SCID) characterized
by the absence of T cells but normal numbers of B cells and NK cells.;