F(ab')2 (dimer of an antigen-binding fragment) is IgG minus Fc (the constant/crystalline/complement-fixing fragment). It has 2 antigen-binding paratopes.
Spacefilling model of F(ab')2 fragment.
Spacefilling:
Heavy Chain,
Heavy Chain.
Light Chain,
Light Chain.
Cartoon,
Disulfide bonds.
Backbone.
Hide backbone.
Zoom to inter-chain disulfide bonds.