title: Causal analysis of embryonic differentiation. II. Dual function of exogenous RNA in differentiation of presumptive ectoderm.
mesh_terms: D000818:Animals; D001853:Bone Marrow; D001921:Brain / Q000196:embryology; D002417:Cattle; D002454:Cell Differentiation / Q000187:drug effects*; D003238:Connective Tissue / Q000196:embryology