="an ">&ensp;</span>sustained <span  title="" class="an ">&ensp;</span>K <span  title="" class="an ">&ensp;</span>stimulation <span  title="" class="an ">&ensp;</span>Significant <span  title="" class="an ">&ensp;</span>contributions <span  title="" class="an ">&ensp;</span>to <span  title="" class="an ">&ensp;</span>the <span  title="" class="an ">&ensp;</span><span  title="ProteinName" class="an ProteinName">Ca</span><span  title="" class="an ">&ensp;</span>transient <span  title="" class="an ">&ensp;</sp