This image was created using a combination of [http://www.ks.uiuc.edu/Research/vmd/ VMD], [http://office.microsoft.com/en-us/powerpoint/default.aspx powerpoint] [http://www.openoffice.org/ openoffice] and [http://www.gimp.org/ GIMP].