Fig. 3

Specific Fab-PEG interactions. The PEG fragments are shown as thick stick models with yellow carbons. The protein models are shown as Cα-tracing diagrams. The heavy chains are colored green and the light chains cyan. The participating amino-acid side chains along with a few backbone parts are shown as thin sticks. The labels with asterisks denote the residues from the other monomer in a dimer. The two bound water molecules to the core PEG fragment are shown as pink spheres. Some hydrogen bonds are indicated by pink dashes. In (a) the view is centered at the core fragment. In (b) it is centered at the satellite fragment on the other side