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CD4

Definition

CD4 is a protein, which can be found on the surface of various cells, among others T-lymphocytes (T4-cells, helper T-cells). By binding to the CD4-molecules, HI-viruses can pass into the cells. CD4-test determines the amount of helper T-cells . The CD4-value is reverse proportionally to the impairment of the immune system, this means,


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