Comparison of bouyant density of two mutants of ECHO 6 by density gradient ultracentrifugation.
D002499:Centrifugation, Density Gradient; D002586:Cesium; D029822:Enterovirus B, Human; D009154:Mutation; D014461:Ultracentrifugation; D014774:Virulence; D014776:Virus Cultivation
D002586:Cesium