The role of cell interactions in the control of RNA synthesis.
D000818:Animals; D002454:Cell Differentiation; D002499:Centrifugation, Density Gradient; D003593:Cytoplasm / Q000378:metabolism*; D004447:Echinodermata / Q000196:embryology; D010759:Phosphorus Isotopes; D012313:RNA / Q000096:biosynthesis*; D014461:Ultracentrifugation
D010759:Phosphorus Isotopes; D012313:RNA