This image was created using a combination of <a rel="nofollow" class="external text" href="http://www.ks.uiuc.edu/Research/vmd/">VMD</a>, <a rel="nofollow" class="external text" href="http://office.microsoft.com/en-us/powerpoint/default.aspx">powerpoint</a> <a rel="nofollow" class="external text" href="http://www.openoffice.org/">openoffice</a> and <a rel="nofollow" class="external text" href="http://www.gimp.org/">GIMP</a> and uses the <a href="https://en.wikipedia.org/wiki/Protein_Data_Bank" class="extiw" title="en:Protein Data Bank">pdb</a> files <a rel="nofollow" class="external text" href="http://www.pdb.org/pdb/explore/explore.do?structureId=2ANT">2ANT</a> (model <b>A</b>) and <a rel="nofollow" class="external text" href="http://www.pdb.org/pdb/explore/explore.do?structureId=1AZX">1AZX</a> (model <b>B</b>).
<a href="https://en.wikipedia.org/wiki/User:K.murphy" class="extiw" title="en:User:K.murphy">K.murphy</a> (<a href="https://en.wikipedia.org/wiki/User_talk:K.murphy" class="extiw" title="en:User talk:K.murphy">talk</a>)
<span class="int-own-work" lang="en">Own work</span> (<span lang="en" dir="ltr">Original text: <i><bdi lang="">self-made</bdi></i></span>)