title: A puzzle: how similar signals yield different effects.
authors.forename: K
authors.initials: K
authors.lastname: Schmidt
mesh_terms: D000818:Animals; D002450:Cell Communication; D004627:Embryonic Induction; D018507:Gene Expression Regulation, Developmental; D011905:Genes, ras; D009024:Morphogenesis; D015398:Signal Transduction; D018631:ras Proteins / Q000235:genetics / Q000502:physiology*
chemical_list: D018631:ras Proteins