<pre>        <span class="sld">u</span>   <span class="sld">gu</span>                uuagggucacac
5' uggga <span class="sld">gag</span>  <span class="sld">aguagguuguauaguu</span>            c
   ||||| |||  ||||||||||||||||            c
3' auc<span class="sld">cu</span> <span class="sld">uuc</span>  <span class="sld">ucaucuaacauauc</span>aa            a
        -   <span class="sld">ug</span>                uagagggucacc </pre>