gliteral">&#39;UTP&#39;</span>,  <span class="comment"># uridine 5&#39;-triphosphate</span></div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;                                              <span class="stringliteral">&#39;AR&#39;</span>,  <span class="comment"># argon</span></div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;                                              <span class="stringliteral">&#39;N4M&#39;</span>, <span class="comment"># 5