tokens: Mutations affecting only CD4 regulation mapped to residues previously shown to mediate the binding of Nef to this receptor , such as W57 and L58 , as well as to an AP recruiting dileucine motif and to an acidic dipeptide in the C-terminal region of the protein .
folded_tokens: mutation affect only cd4 regulation map to residue previously show to mediate the binding of nef to this receptor , such as w57 and l58 , as well as to a ap recruiting dileucine motif and to a acidic dipeptide in the c-terminal region of the protein .