From this page you can use interactive molecular graphics 
to examine some of the molecular systems presented as colour
images.
You will need to install the Chime molecular visualiser
which can be downloaded from the MDL web-site (click
<a href="http://www.mdlchime.com">here</a>). 
Note that some of these files may take up to a minute to download,
especially on a slow connection.
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<a href="./mm2e_chime_nadph.html">NADPH</a> - demonstrates some of the varied ways to represent "small" molecules.
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<a href="./mm2e_chime_dhfr.html">DHFR</a> - demonstrates the representation of proteins (pdb file 4dfr).
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<a href="./mm2e_chime_nu87.html">NU87</a> - A zeolite structure indicating the various pores and channels.
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<a href="./mm2e_chime_serine_proteases.html">chymotrypsin-like serine proteases</a> - a comparison of three homologous proteins (pdb files 1try, 1chy, 1dwd).
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<a href="./mm2e_chime_isostar_thiazole.html">Intermolecular interactions</a> -
the distribution of OH groups around thiazole rings,
extracted from the Cambridge Structural Database using IsoStar.
The data demonstrates the greater propensity of the nitrogen atom
to act as a hydrogen bond acceptor than the sulphur atom.
<p>
<a href="./mm2e_chime_lipid.html">Lipid membrane</a>. A snapshot from a molecular dynamics simulation of a protein embedded in
a lipid membrane. To aid clarity the water molecules have been omitted from the
display. Data generated by Alan Robinson.
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<a href="./mm2e_chime_hiv_protease.html">HIV protease</a> - showing bound ligand (CGP53820), key water molecule (in white) and the catalytic aspartyl groups (pdb file 1hih).
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