sli-1 mutations suppress the engulfment defects caused by engulfment ced gene mutations.

First larval stage (L1) worms were anaesthetized and viewed using DIC microscopy. The numbers of cell corpses in the heads were counted. s.d., standard deviation.将处于首次幼虫期（L1）的线虫施以麻醉处理，随后以微分干涉差（DIC）显微镜进行观测，并计数其头部的细胞尸体（cell corpses）数量。其中s.d.即标准差（standard deviation）。