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.
1qisA - 1b4xA of substitution F-S at 191
*1qisA: red cartoon and yellow stick
*1b4xA: green cartoon and blue stick
Protein structure alignment:
Protein sequence alignment:
Protein sequence alignment: