title: Developmental biology. How to make the gradient.
authors.forename: J M
authors.initials: JM
authors.lastname: Slack
mesh_terms: D028341:Activins; D000818:Animals; D004627:Embryonic Induction / Q000502:physiology*; D018507:Gene Expression Regulation, Developmental; D007265:Inhibins / Q000502:physiology; D015398:Signal Transduction; D014981:Xenopus
chemical_list: D028341:Activins; D007265:Inhibins