A 24 bit TrueColor TIFF high resolution version of each image is provided by clicking on the small inline images.
Yellow clouds represent hydrophobic pockets.
The accessible surface of the receptor is rendered translucent indicating the distance from the ligand atoms, i.e. close van der Waals contacts are opaque and the translucency increases by the square of distance between the van der Waals spheres until it becomes completely transparent at 2.5A. Surface colouring and the solid objects have the same meaning as on the previous image. A different view of the GDP - P21 interaction site. A different set of H-bonding sites is shown. Accessible surface and hydrogen bonding site representation as on the previous images. The active site of the protein P21.