TABLE 1.

Specific interactions between dipeptide and gp120 residues^a

Interacting atoms	Residue in:		Distance (Å)b	Interaction type
	gp120	Dipeptide
Indole rings	W422	W1	3.5	Hydrophobic
Cζ2-Cγ1	V255	W1	3.6	van der Waals
O-Cδ1	D470	W1	3.2	van der Waals
O-N	D470	W1	3.2	Hydrogen bond
Cδ3-Cγ	E368	W1	2.9	Hydrophobic
Oδ1-N	N420	G2	3.2	Hydrogen bond
Oδ1-N	D366	G2	2.8	Hydrogen bond
Cγ1-Cγ2	V255	V1	3.3	Hydrophobic
Cζ3-Cγ2	W111	V1	3.5	Hydrophobic
Oε2-N	E368	V1	3.6	Salt bridge
Cβ-Cα	W422	Q2	3.3	Hydrophobic
O-N	G468	Q2	3.2	Hydrogen bond
O-Oε1	M421	Q2	3.1	Hydrogen bond—water mediated

^aThe table summarizes the specific interactions between atoms of residues belonging to dipeptides and residues belonging gp120 and their type of interaction.

^bNearest atom distance.