| http://www.w3.org/ns/prov#value | - HIV-1 infection of human cells requires binding of the viral envelope protein (Env) to CD4 and a coreceptor, which may be either the CCR5 or CXCR4 chemokine receptor.1-10 CCR5 is of particular interest because it is used by the viruses that are detected in new infections, and it is therefore thought to be important in transmission of HIV infection.11 The recognition of the importance of CCR5 came
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