Figure 1
From: Clustering of HIV-1 Subtypes Based on gp120 V3 Loop electrostatic properties
Molecular models of the V3 loop. (A) Stick representation of backbone and side chains using the gp120 structure with PDB Code 2QAD. (B) Ribbon representation of backbone using the structure with PDB Code 2QAD. (C) Stick representation of backbone and side chains using the gp120 structure with PDB Code 2B4C. (D) Ribbon representation of backbone using the gp120 structure with PDB Code 2B4C. The color code for (A) and (C) is: blue, positively charged; red, negatively charged; green, polar; gray, nonpolar. The color code for (B) and (D) is according to secondary structure. Images were generated using VMD [78].