        <span class="stringliteral">&#39;GTP&#39;</span>,  <span class="comment"># guanosine-5&#39;-triphosphate</span></div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;                                              <span class="stringliteral">&#39;UDP&#39;</span>,  <span class="comment"># uridine-5&#39;-diphosphate</span></div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;                                              <span class="stringlitera