Noun
CXCR4 (countable and uncountable, plural CXCR4s)
Initialism of C-X-C chemokine receptor type 4. (a co-receptor of CD4 receptor)
It does this by down-regulating the expression of CXCR4 on the surface of these cells. Source: Internet
Prevalence of CXCR4 tropism among antiretroviral-treated HIV-1-infected patients with detectable viremia. Source: Internet