UASt sequences regulate expression of N in which a. the N-terminal EGF repeat containing part of the extracellular domain has been replaced by Tag:LBD(FSHR) and b. a conserved Leu codon present in the spacer between the first two LIN-12/Notch repeats of the juxtamembrane NRR (negative regulatory region) has been deleted. The coding sequence is tagged with mCherry just upstream of the juxtamembrane NRR (negative regulatory region). A single FRT site is present in between the UASt and coding sequences.