                      <span class="stringliteral">&#39;DTT&#39;</span>,  <span class="comment"># 2,3-dihydroxy-1,4-dithiobutane</span></div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                                              <span class="stringliteral">&#39;PQN&#39;</span>,  <span class="comment"># phylloquinone</span></div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;                                              <span class="stringlite