Figure 2: X-ray structure of an IgG antibody
(Top) Antibody structure with key distances highlighted. (Bottom) The different structures (1:1, 2:2, 3:3, n:n) that can be formed by the aggregation of a bivalent antibody with a bivalent ligand. Here, ÒYÓ shaped structures with triangular or circular binding pockets will be used to represent IgGs.