A heat shock promoter drives expression of the Sb cytoplasmic domain, transmembrane domain and some extracellular sequence (but not the disulfide knot).
13% of flies expressing two copies of SbCD-TM.hs (using four 1 hour heat shocks at 25, 27, 29 and 31 hours AP) in a Df(3R)sbd105/+ background have a short-bristle phenotype.
C. Bayer