Here are three beautiful examples of computer models created to explain complex enzymes:
Computer model of ligase enzyme, which forms chemical bonds between molecules. The different colors show the different subunits that comprise the protein. Proteins form the majority of the structural and functional units in all organisms. Study of the structure and function of proteins provides greater insight into how organisms work.
Computer artwork of a molecule of neuraminidase, an enzyme found on the surface of the influenza virus. Neuraminidase allow the virus particles to exit the host cell after replication. There are nine known subtypes of neuraminidase, but only two of them (N1 and N2) have been linked to epidemics in humans.
A computer molecular model of a protein nanotube. This is a chaperonin heat shock protein, one that protects the bacterium from damage by high temperatures. The crystal structure actually contains information for only a single pair of red and green strands and the viewer imposes symmetry operations to arrange eight pairs around the circumference of the tube (which is also opened up to expose its interior). The green and yellow spheres represent amino acid residues.