"an ">&ensp;</span>Q <span  title="" class="an ">&ensp;</span>X <span  title="" class="an ">&ensp;</span>mutations <span  title="" class="an ">&ensp;</span>were <span  title="" class="an ">&ensp;</span>expressed <span  title="" class="an ">&ensp;</span>in <span  title="" class="an ">&ensp;</span>photoreceptor <span  title="" class="an ">&ensp;</span>derived <span  title="" class="an ">&ensp;</span>W <span  title="" class="an ">&ensp;</span><span  title="Neuron" class="an Neuron">cells</span><span  title="" 