In the next step of the viral life cycle, the structural subunits of HIV mesh with the cell's membrane and begin to deform a section of the membrane.
When tested in in vitro assays, compoundsand showed EC50 values of 5. Attachment is a specific binding between proteins on the surface of the virus and proteins that serve as receptors on the surface of the T-cell. The viral RNA is protected in the nucleocapsid.
Examples are plants from the Anadenanthera genus that are used in the hallucinogenic yopo snuff.