Fig. 7. Thoraces of pharate adults after misexpression of four copies of each of the BR isoforms at 56 hours APF. Note the shiny pupal-like cuticle and thin nonpigmented bristles after expression of the Z1 isoform (the line used in Fig. 5A). The thorax appears normal after misexpression of the Z2 isoform. After misexpression of both Z3 and Z4 isoforms, the cuticle appears normal, but the bristles are nonpigmented with the difference being that the sockets of the macrochaetes are prominent after Z3 but not after Z4 misexpression.