https://doi.org/10.1351/goldbook.13164
Viral glycoprotein, non-covalently associated with gp41 in the viral envelope of human immunodeficiency virus (HIV).
Note: The gp120 portion of the glycoprotein complex binds with high affinity to the cell-surface molecule CD4. Before fusion and entry of the virus, gp120 must bind to a coreceptor in the membrane of the host cell, for instance chemokine receptors (mainly CCR5).