Clustering of 41 antibody-antigen complexes based on combined distance. This dendrogram is showing the clustering of four groups of antibody-antigen complexes based on a combination of 3D and chemical distances. Complexes with antigen GP41 are shown with a green background. Complexes with antigen GP120 are shown with a yellow background. Complexes with antibody 17B, are shown with their PDB ID colored blue. Complexes with antibody 2F5 are shown with their PDB ID colored red. Complexes with antibody ANTI-HIV-1 V3 FAB 2557 are shown with their PDB ID colored black.