an class="comment"># zinc ion on 3-fold crystal axis</span></div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;                                              <span class="stringliteral">&#39;TTP&#39;</span>,  <span class="comment"># thymidine-5&#39;-triphosphate</span></div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;                                              <span class="stringliteral">&#39;NO3&#39;</span>,  <span class="comment"># nitrate