title: Conserved in structure but diverse in recognition.
authors.forename: Peter D
authors.initials: PD
authors.lastname: Sun
mesh_terms: D030201:Activin Receptors, Type I / Q000737:chemistry* / Q000378:metabolism; D030301:Activin Receptors, Type II / Q000737:chemistry* / Q000378:metabolism; D001665:Binding Sites; D046911:Macromolecular Substances; D011487:Protein Conformation; D011506:Proteins; D015398:Signal Transduction; D016212:Transforming Growth Factor beta / Q000378:metabolism
chemical_list: D046911:Macromolecular Substances; D011506:Proteins; D016212:Transforming Growth Factor beta; D030201:Activin Receptors, Type I; D030301:Activin Receptors, Type II