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HIV/AIDS Glossary

Coreceptor

A protein on the surface of a cell that serves as a second binding site for a virus or other molecule. In order to enter a host cell, HIV must bind to two sites on the cell: the primary CD4 receptor and either the CCR5 or CXCR4 coreceptor.

Related Term(s): CCR5, CXCR4, Receptor

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HIV binds to a host CD4 cell via coreceptors.

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