Studies over more than a decade have generated a picture of how the external Env subunit (gp120) interacts first with the primary receptor (CD4) and then with a co-receptor (a chemokine receptor ...

FcεRI (high-affinity Fc receptor for IgE) and CD23, as well as galectin-3 and several co-receptors for CD23, notably CD21 and various integrins. Here, we review recent progress in uncovering the ...