For 10 points, identify this family of signaling proteins named after a certain animal, whose three mammalian members are desert, Indian, and Sonic.
Molecules in this family are typically cleaved at a glycine around position 250, resulting in a C-terminal domain that has no known use.  The signaling pathway of one molecule in this family involves a complex consisting of the proteins Fused, Costal-2, and Cubitus interruptus, and members of this family often attach to the membrane proteins Patched and Smoothened.  Neural tube differentiation is controlled by a ventral-dorsal gradient of one protein in this family.  For 10 points, identify this family of signaling proteins named after a certain animal, whose three mammalian members are desert, Indian, and Sonic.
Molecules in this family are typically cleaved at a glycine around position 250, resulting in a C-terminal domain that has no known use.  
{hedgehog} or {Hh} (do not accept or prompt on “Sonic Hedgehog” as we need the family and the signaling pathway is relevant to Drosophila Hedgehog, not Sonic hedgehog)