"In an otherwise wild-type background, the
mab-5::lacZ reporters muIs3 and muIs4 were expressed in the QL descendents but not in the QR descendants (Table 5). In addition, we examined the expression of these reporters in the QL descendents in the
egl-20(
n585) background. Consistent with prior observations (Harris et al. 1996),
egl-20(+) is required for
mab-5 expression in these cells (Table 5)."