Jmol view
The 3D View page visualizes the PDB structures using Jmol (an open-source Java viewer for chemical structures in 3D, http://www.jmol.org/) and provides options to render structures in different styles and colors.
1qk2A - 4au0B of substitution A-D at 221
*1qk2A: red cartoon and yellow stick
*4au0B: green cartoon and blue stick
Protein structure alignment:
Protein sequence alignment:
Protein sequence alignment: