UASt regulatory sequences drive expression of mature SP (lacking the signal sequence) that is tagged at the N-terminal end with Tag:polyHis. The protein produced cannot be secreted due to the lack of signal sequence.
Scer\GAL429BD, Scer\GAL4C357, Scer\GAL4C420, Scer\GAL4C370, Scer\GAL4C502b, Scer\GAL4156Y, Scer\GAL419Y, Scer\GAL49Y, Scer\GAL47B and Scer\GAL455B-mediated expression does not affect female receptivity but ovulation is reduced to zero or very low levels.