Ribonuclease Inhibitor

Model of Bovine Ribonuclease Inhibitor based on the Protein Data Bank entry 1DFJ:
http://www.rcsb.org/pdb/explore/explore.do?structureId=1dfj

"Ribonuclease inhibitor (RI) is a large (~450 residues, ~49 kDa), acidic (pI ~4.7), leucine-rich repeat protein that forms extremely tight complexes with certain ribonucleases. It is a major cellular protein, comprising ~0.1% of all cellular protein by weight, and appears to play an important role in regulating the lifetime of RNA."
-https://en.wikipedia.org/wiki/Ribonuclease_inhibitor

STL file created using VMD:
http://www.ks.uiuc.edu/Research/vmd/