ass="stringliteral">&#39;GA&#39;</span>,  <span class="comment"># gallium (iii) ion</span></div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;                                              <span class="stringliteral">&#39;TPP&#39;</span>,  <span class="comment"># thiamine diphosphate</span></div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;                                              <span class="stringliteral">&#39;CHX&#39;</span>,  <span cla