Expression of a 570bp EcoRI-SalI fragment isolated from PCR product of psq02403 truncation mRNA is driven by an Hsp70 promoter. Fragment contains the entire coding region of the predicted fusion protein as well as 47bp of psq 5' UTR and 29bp of sequence 3' to the predicted l(3)87Df stop codon.
Heat induced expression of P{hs-psq-l(3)S12} causes a dramatic drop in the number of eggs laid. Females exhibit a decreased number of egg chambers at all stages.