Fig. 5

PEG binding in the 32D6-Fab crystal. a The first PEG fragment is shown as a thick stick model in pink. The protein molecules are shown as Cα-tracing diagrams, in green and cyan for the heavy and light chains of the primary Fab molecule, and in yellow and magenta for the heavy chains of two neighboring Fab related by crystallographic symmetry. Selected amino-acid side chains are shown as thin sticks. Potential hydrogen bonds are denoted by cyan dashes. b The second PEG fragment is shown in a similar way as in (a)