title: Preparative density gradient centrifugation of RNA and DNA in cesium sulfate-urea mixture.
abstract: A new procedure is described for a large scale separation and purification of unfixed DNA and RNA from a mixture of partially extracted nucleic acids and lysates of subcellular fractions by centrifugation to equilibrium in cesium sulfate-urea mixture. Optimum conditions are described for the separation and quantative recovery of both RNA and DNA in a pure form. The procedure allows determination of peak buoyant densities of 4-5s RNA, 7-11s mRNA and total cytoplasmic RNA. The procedure also allows fractionation of small molecular weight classes of cytoplasmic RNAs from the 18s and 28s rRNAs.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient / Q000379:methods; D002586:Cesium; D004247:DNA / Q000302:isolation & purification*; D004372:Ducks; D004900:Erythroblasts / Q000032:analysis; D066298:In Vitro Techniques; D012313:RNA / Q000302:isolation & purification*; D014508:Urea
chemical_list: D002586:Cesium; D012313:RNA; D014508:Urea; D004247:DNA