Expression of wg^PE2.hs in a wild-type background using a single heat shock at 4 hours of development results in an excess of naked cuticle. Expression of wg^PE2.hs in a wild-type background using a single heat shock at 6 hours of development subtly alters the denticle pattern, producing a partial loss or rearrangement of denticles in the second or third row of the denticle belt, but does not induce naked cuticle. Expression of wg^PE2.hs by three consecutive heat shocks in wg^l-17 embryos restores denticle diversity, but there is no secretion of naked cuticle. Expression of wg^PE2.hs using a single heat shock at 6 hours of development in wg^l-17 embryos produces reorientation of the denticles toward the ventral midline, but no specification of naked cuticle.