<p>Ribbon diagram of <i><a href="https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae" class="extiw" title="w:Saccharomyces cerevisiae">Saccharomyces cerevisiae</a></i> <a href="https://en.wikipedia.org/wiki/RNA_polymerase_II" class="extiw" title="w:RNA polymerase II">RNA polymerase II</a> in complex with <a href="https://en.wikipedia.org/wiki/Alpha-Amanitin" class="extiw" title="w:Alpha-Amanitin">α-amanitin</a> (red). <a href="https://en.wikipedia.org/wiki/Active_site" class="extiw" title="w:Active site">Active site</a> <a href="https://en.wikipedia.org/wiki/magnesium" class="extiw" title="w:magnesium">magnesium</a> ion visible in pink near center.<br>Created using <a href="https://en.wikipedia.org/wiki/PyMOL" class="extiw" title="w:PyMOL">PyMOL</a> (<a rel="nofollow" class="external free" href="http://pymol.sourceforge.net">http://pymol.sourceforge.net</a>) and <a href="https://en.wikipedia.org/wiki/GIMP" class="extiw" title="w:GIMP">GIMP</a>. Style and orientation made to match <a rel="nofollow" class="external free" href="http://www.pnas.org/content/vol99/issue3/images/large/pq0326646002.jpeg">http://www.pnas.org/content/vol99/issue3/images/large/pq0326646002.jpeg</a>.
</p>
<dl><dt>Legend</dt></dl><div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:lightblue;color:#202122;text-align:center;"> </div> <a href="https://en.wikipedia.org/wiki/RNA_polymerase_II" class="extiw" title="w:RNA polymerase II">RNA polymerase II</a></div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:magenta;color:#202122;text-align:center;"> </div> <a href="https://en.wikipedia.org/wiki/Active_site" class="extiw" title="w:Active site">Active site</a> <a href="https://en.wikipedia.org/wiki/magnesium" class="extiw" title="w:magnesium">magnesium</a> ion</div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:red;color:#202122;text-align:center;"> </div> <a href="https://en.wikipedia.org/wiki/alpha-Amanitin" class="extiw" title="w:alpha-Amanitin">α-amanitin</a></div>
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:grey;color:#202122;text-align:center;"> </div> <a href="https://en.wikipedia.org/wiki/Zinc" class="extiw" title="w:Zinc">Zinc</a> ions</div>
<a href="//commons.wikimedia.org/wiki/User:Fvasconcellos" title="User:Fvasconcellos">Fvasconcellos</a> 21:15, 14 November 2007 (UTC)
<p>From <a href="https://en.wikipedia.org/wiki/Protein_Data_Bank" class="extiw" title="w:Protein Data Bank">PDB</a> entry <a rel="nofollow" class="external text" href="http://www.rcsb.org/pdb/cgi/explore.cgi?pdbId=1K83">1K83</a>.<br>More information:
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<ul><li><cite style="font-style:normal">Bushnell DA, Cramer P, <a href="https://en.wikipedia.org/wiki/Roger_D._Kornberg" class="extiw" title="w:Roger D. Kornberg">Kornberg RD</a> (2002). "Structural basis of transcription: alpha-amanitin-RNA polymerase II cocrystal at 2.8 A resolution". <i>Proc Natl Acad Sci USA</i> <b>99</b> (3): 1218–22. <a class="external mw-magiclink-pmid" rel="nofollow" href="//www.ncbi.nlm.nih.gov/pubmed/11805306?dopt=Abstract">PMID 11805306</a>.</cite> <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1073%2Fpnas.251664698">10.1073/pnas.251664698</a> <a rel="nofollow" class="external text" href="http://www.pnas.org/cgi/content/full/99/3/1218">Free full text</a></li></ul>