title: Recycling signaling molecules during development.
authors.forename: Sara
authors.initials: S
authors.lastname: Ahlgren
authors.forename: Marianne
authors.initials: M
authors.lastname: Bronner-Fraser
mesh_terms: D000818:Animals; D001921:Brain / Q000196:embryology; D002642:Chick Embryo / Q000502:physiology*; D053823:Hedgehog Proteins; D015398:Signal Transduction / Q000502:physiology*; D015534:Trans-Activators / Q000502:physiology*
chemical_list: D053823:Hedgehog Proteins; D015534:Trans-Activators