Source was embryos of wild-type or mutant fly line; bait produced from endogenous gene; prey produced from endogenous gene.

Treatment with RNase abolishes the pAbp-tral interaction. Interaction decreases in 1-2 hr embryos and is undetectable 2-3, 3-4, and 4-5 hr embryos despite the presence of protein. Decrease/disruption in interaction requires wild-type png.