The ectopic vein phenotype of Gap1sxt-BJ61 homozygotes is enhanced by a copy of pbhs.PB. This enhancement is reduced if the flies also carry one copy of Ras85De1B. One copy of Gap1sxt-BJ61 has only a weak effect on the pbhs.PB phenotype, but two copies of Gap1sxt-BJ61 significantly enhance the antenna to maxillary transformation seen in pbhs.PB flies. This enhancement is reduced if the flies also carry one copy of Ras85De1B. Alters the labial transformation phenotype of pb4 homozygotes towards wild-type. Enchances the scd1/Y and Df(3R)Ubx109/+ phenotypes. The enhancement of the Df(3R)Ubx109/+ phenotype by Gap1sxt-BJ61 is partially reversed if the flies also carry Ras85De1B.