span>after <span  title="" class="an ">&ensp;</span>elevation <span  title="" class="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span>calcium <span  title="" class="an ">&ensp;</span>from <span  title="" class="an ">&ensp;</span>the <span  title="" class="an ">&ensp;</span>cytoplasmic <span  title="" class="an ">&ensp;</span>side <span  title="" class="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span>the <span  title="" class="an ">&ensp;</span>membrane <span  title="" class="an ">