The smallest protein: Trp-Cage Miniprotein PDB 1L2Y

https://www.science20.com/princerain/blog/smallest_protein

I have rendered this protein in 4 styles:

Surface
All atoms (except hydrogens) as sticks
Ribbons
Ribbons with side chains as sticks

And here is a scientific article showing how fast it folder:
"Smaller and Faster: The 20-Residue Trp-Cage Protein Folds in 4 μs"
https://pubs.acs.org/doi/10.1021/ja0279141