UASt regulatory sequences drive expression of a truncated form of by which lacks amino acids 451-720.
byΔC.UAS/Scer\GAL4Bx-MS1096 fails to rescue by2
Expression of byΔC.Scer\UAS under the control of Scer\GAL4Bx-MS1096 fails to rescue the wing blister phenotype of by2 homozygotes.