When
lin-39 transgene deIs6, which showed P6.px GFP expression in 60% of animals, was introduced into a
lin-1(
e1777) loss-of-function background, in which all the VPCs adopt vulval fates, the GFP expression domain was expanded to all six VPCs. However, GFP expression in P6.px was significantly reduced compared to deIs6 (7% vs. 60%).