Nucleosome Core Complex

"A nucleosome is the basic unit of DNA packaging in eukaryotes, consisting of a segment of DNA wound in sequence around eight histone protein cores. This structure is often compared to thread wrapped around a spool."
http://en.wikipedia.org/wiki/Nucleosome

This model is based on Protein Data Bank entry 1KX5:
http://www.rcsb.org/pdb/explore.do?structureId=1kx5
There are separate STL files for the protein and DNA components.

Model created using VMD:
http://www.ks.uiuc.edu/Research/v