2012-03-13: Note that I’m trying to supply support as soon as possible. Please, in return, show us one of your structures you handle with Atomic Blender by uploading some nice rendered images. Thanks!
Examples - 1: http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Import-Export/PDB#Examples
Examples - 2: http://development.root-1.de/Atomic_Blender_PDB_Examples.php
Here are some movies:
******************** Original message ********************
I just finished my small little Python/Blender project Atomic Blender. It loads crystal or molecule structures from PDB files into Blender 2.5 (and higher versions). I integrated a panel into the Tools tab with many kind of options, which permits an easy handling of the structures. More details can be found here:
I hope that it is for some good use.
If you have any comments, please let me know.
EDIT (2011-12-30): New version of the script: Version 1.2 (see http://development.root-1.de/Atomic_Blender_PDB_Changes.php)
EDIT (2011-12-16): Blender 2.61 is out. So, for activating the script in Blender 2.61 go to: File -> User Preferences -> Official/Community. Search and mark ‘PDB - Atomic Blender’ and choose also ‘Save As Default’. That’s it! You can import PDB files via: File -> Import -> Protein Data Bank (*.pdb)
EDIT (2011-12-09): A new version of Blender will be published soon, where Atomic Blender is a part of. Please, wait for the final release (next week).
Otherwise: You can find the newest version of Atomic Blender always here: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons/ or in the ad-on section of Blender (before version 2.61: User Preferences -> Testing, Later in version 2.61: User Preferences -> Official/Community).