I principali nucleotidi
<ul><li>PNG by <a href="//commons.wikimedia.org/wiki/User_talk:BorisTM" title="User talk:BorisTM">Boris</a></li>
<li>SVG by <a href="//commons.wikimedia.org/w/index.php?title=User:Gigillo83&amp;action=edit&amp;redlink=1" class="new" title="User:Gigillo83 (page does not exist)">Gigillo83</a></li></ul>
<a href="https://en.wikipedia.org/wiki/Image:Nucleotides.png" class="extiw" title="en:Image:Nucleotides.png">Nucleotides.png</a>