title: Large-scale purification of ribonucleic acid tumor viruses by use of continuous-flow density gradient centrifugation.
abstract: This report describes a 200- to 300-fold increase in the quantity of ribonucleic acud tumor virus particles previously isolated at one time by zonal centrifugation.
mesh_terms: D001354:Avian Leukosis Virus / Q000302:isolation & purification; D002499:Centrifugation, Density Gradient; D002501:Centrifugation, Zonal; D017988:Gammaretrovirus / Q000302:isolation & purification; D008722:Methods; D009858:Oncogenic Viruses / Q000302:isolation & purification*; D012328:RNA Viruses / Q000302:isolation & purification*