I wanted to inform you that sine oculis interacts genetically also with eyeless (ey2/ey2; so3/+ flies have more severely reduced eyes that ey2/ey2; \+/+ flies). regards, FP Francesca Pignoni, Ph.D. Dept. of Ophthalmology (Genetics) Harvard Medical School 243 Charles Street, MEEI 509 Boston, MA 02114