Polio Virus - monomer. This model is a subunit of the poliovirus. It is 5 million times real life. This monomer recombines with 59 other copies to form the icosahedral virus shown here: http://shpws.me/FjwV
The red, blue, gray and yellow coloring in the full color sandstone model represent the individual atoms that make up this protein. Red represents oxygen, blue is nitrogen, gray is carbon and yellow is sulfur.