P{EP} insertion within an intron, 5' of the CDS.
Expression of CG4747EP594 under the control of Scer\GAL4sca-537.4 results in the loss of external support cells of the scutellar and dorsocentral macrochaetae without loss of the sheath cell. Sensory organs with no socket and one shaft, one socket and no shaft and dot-like shaft morphology are seen.