This was made on a MakerBot with support. Some of the atoms did not print as well, but errors were patched with air-dry clay. I used acrylic paint to color the model. For the one showing the residues, I used dark colors for the side chains and light colors for the backbone to highlight the different amino acids.
Coloring for this model was inspired by:
http://www.3dmoleculardesigns.com/Education-Products/Beta-Sheet-Models.htm
Click to Enlarge - 4 image(s)