UAS regulatory sequences drive expression of a slmb-binding mutant of SAK, in which two key residues in the binding consensus have been mutated, changing DSGIIT to DAGIIA (S293A/T297A).
Expression of SAKScer\UAS.SBM under the control of Scer\GAL4Bx-MS1096 causes no growth or polarity defects in wing discs.