This is the CD4 receptor
 
 
 
 

 CD4 is the receptor site on the human lymphocyte cell, to which gp-120 binds. Once gp-120 binds with CD4 a chain reaction of events occur that eventually allow the HIV virus to inject its genetic material into the cell for infection.
 
 
 
 
 

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 Group 2
The Biology Project
University of Arizona
Tucson, AZ. 85719