Figure 2

Crystal structures of the WW domain fused with MBP.
(a) Overall structure of the WW domain fused with MBP. The regions of the WW domain and linker are shown as ribbon models and the regions of MBP are shown as surface models. (b) Secondary structure of the regions of the WW domain. The cylinders and arrows indicate alpha helices and beta strands, respectively. The disordered regions are shown as dashed lines. (c) Superimposition with three WW11. The (a,b) chains in the Form I crystal are colored magenta and pink, while the A chain in the Form II crystal is colored purple.