Gene	Where Expressed	Action of Gene Product
dorsal	Ovary	Affects the expression of genes such as twist and decapentaplegic
cactus	Ovary	Traps Dorsal protein in the cytoplasm
toll	Ovary	Leads to the phosphorylation of Cactus, which is then degraded, releasing Dorsal to move into the nuclei of ventral cells
twist	Embryo	Takes part in the development of mesodermal tissues*
decapentaplegic	Embryo	Takes part in the development of gut structures
*One of the three primary tissue layers in the early embryo.