Structure 1.0.2

Structure is a screensaver for Mac OS X that draws on the National Center for Biotechnology Information's protein databases to display beautiful 3D protein structures on your screen. It ships with about ten sample structures and via the Internet has seamless access to a database of tens of thousands more. Regardless of whether you know anything about biology or not, the structures on your screen create a mesmerizing and informative
screensaver.
Structure's features include:

Support for five rendering styles:
ball and stick, space fill, tubes, wireframe, worms
Dynamic downloading of files from huge database
On-screen display of additional structure information (attribution, source organism, amino acid sequence, etc.)
Fast OpenGL rendering with multiple quality settings