9483
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 .
 CD4, Nef, AP - recruiting dileucine motif
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CD4, Nef, AP - recruiting dileucine motif