Definition of CD4

CD4: A large glycoprotein molecule found on the surface of T lymphocytes that serves as the receptor for HIV. The CD4 gene is on chromosome 12 in region 12pter-p12. CD4 is also called T4. See also: Absolute CD4 count.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=33403
Last Editorial Review: 4/27/2011 5:27:15 PM