Peluso et al.: Shaping a Morphogen Gradient

Shaping A Morphogen Gradient Extracellular BMP-binding proteins, such as Sog, regulate the access of BMP ligands to their signaling receptors. Peluso et al. (Developmental Cell, August 2011) report how evolutionary changes in proteolytic control of Sog have influenced morphogen gradient formation and function in the Drosophila embryo.