Linkage of the <a href="https://en.wikipedia.org/wiki/Nucleobases" class="extiw" title="en:Nucleobases">nucleobases</a> <b><a href="https://en.wikipedia.org/wiki/Cytosine" class="extiw" title="en:Cytosine">C</a></b>, <b><a href="https://en.wikipedia.org/wiki/Guanine" class="extiw" title="en:Guanine">G</a></b>, <b><a href="https://en.wikipedia.org/wiki/Adenine" class="extiw" title="en:Adenine">A</a></b> and <b><a href="https://en.wikipedia.org/wiki/Thymine" class="extiw" title="en:Thymine">T</a></b> to the deoxyribose phosphat backbone of <a href="https://en.wikipedia.org/wiki/DNA" class="extiw" title="en:DNA">DNA</a>
<a href="//commons.wikimedia.org/wiki/User:Sponk" title="User:Sponk">Sponk</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Sponk" title="User talk:Sponk"><span class="signature-talk">talk</span></a>)
<span class="int-own-work" lang="en">Own work</span>