clusters of differentiation (CD)


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Refers to cell surface antigens (Ag) that are useful in discriminating between different cell types. The cell-surface molecule is designated CD followed by a number (e.g. CD3, CD4,CD8 etc). Each CD molecule has a specific function, many of which are known and well over 200 have been classified on human cells.

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International Union of Immunological SocietiesUniversity of South AfricaInstitute of Infectious Disease and Molecular MedicineElizabeth Glazer Pediatric Aids FoundationStellenbosch University