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Drosophila terminal systemComments
parentDrosophila development
siblingsDrosophila axis formationDrosophila germ layer formationDrosophila maternal effect genesDrosophila Sex-Lethal (Sxl) protein

Drosophila terminal system

trunk torso active ligand inactive ligand embryogenesis

Torso is a receptor tyrosine kinase (aka Torso RTK) uniformly located in the oocyte's plasma membrane. Torso Ligand is produced by follicle cells and present only at the termini. Huckebein and Tailless are also involved.