Cartoon diagram of <a href="https://en.wikipedia.org/wiki/Pacific_electric_ray" class="extiw" title="w:Pacific electric ray">Pacific electric ray</a> (<i>Torpedo californica</i>) <a href="https://en.wikipedia.org/wiki/acetylcholinesterase" class="extiw" title="w:acetylcholinesterase">acetylcholinesterase</a> in complex with the <a href="https://en.wikipedia.org/wiki/enzyme_inhibitor" class="extiw" title="w:enzyme inhibitor">inhibitor</a> <a href="https://en.wikipedia.org/wiki/donepezil" class="extiw" title="w:donepezil">donepezil</a>.<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://www.pymol.org">http://www.pymol.org</a>) and <a href="https://en.wikipedia.org/wiki/GIMP" class="extiw" title="w:GIMP">GIMP</a>.
<a href="//commons.wikimedia.org/wiki/User:Fvasconcellos" title="User:Fvasconcellos">Fvasconcellos</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Fvasconcellos" title="User talk:Fvasconcellos">talk</a><span style="white-space:nowrap"> <b>·</b></span> <a href="//commons.wikimedia.org/wiki/Special:Contributions/Fvasconcellos" title="Special:Contributions/Fvasconcellos">contribs</a>)
<p>From <a href="https://en.wikipedia.org/wiki/Protein_Data_Bank" class="extiw" title="w:Protein Data Bank">PDB</a> <a rel="nofollow" class="external text" href="http://www.rcsb.org/pdb/cgi/explore.cgi?pdbId=1EVE">1EVE</a>.
More information:
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<ul><li><cite style="font-style:normal">Kryger G, Silman I, Sussman JL (March 1999). "Structure of acetylcholinesterase complexed with E2020 (Aricept): implications for the design of new anti-Alzheimer drugs". <i>Structure</i> <b>7</b> (3): 297–307. <a class="external mw-magiclink-pmid" rel="nofollow" href="//www.ncbi.nlm.nih.gov/pubmed/10368299?dopt=Abstract">PMID 10368299</a>.</cite></li></ul>