="an ">&ensp;</span>to <span  title="" class="an ">&ensp;</span>the <span  title="" class="an ">&ensp;</span>P <span  title="" class="an ">&ensp;</span>X <span  title="" class="an ">&ensp;</span>agonist <span  title="" class="an ">&ensp;</span>alpha <span  title="" class="an ">&ensp;</span>beta <span  title="" class="an ">&ensp;</span>methylene <span  title="" class="an ">&ensp;</span><span  title="ProteinName, CAP" class="an ProteinName CAP">ATP</span><span  title="" class="an ">&ensp;</span>indicating <sp