pan></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;                                              <span class="stringliteral">&#39;NAD&#39;</span>,  <span class="comment"># nicotinamide-adenine-dinucleotide</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;                                              <span class="stringliteral">&#39;CR&#39;</span>,  <span class="comment"># chromium ion</span></div><div class="line"><a name="l00016"