In part 3 of this series (Davidson & Smellie, 1952b) a method was described for the accurate determination of the specific activities of the individual ribonucleotides of the ribonucleic acid (RNA) of the tissues of animals which had received radioactive phosphorus. This method has now been applied to ,he RNA of cell nuclei and of the various morphoogical fractions of the cell cytoplasm. Preliminary aotes on this work have already been published (Davidson, McIndoe, & Smellie, 1951; Smellie & McIlndoe, 1952) and a full account is given here. METHODS
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.