title: Ultracentrifugation of a murine leukemia virus in polymer density gradients.
mesh_terms: D002586:Cesium; D002951:Citrates; D003168:Complement Fixation Tests; D005947:Glucose; D066298:In Vitro Techniques; D009052:Leukemia Virus, Murine; D008854:Microscopy, Electron; D011108:Polymers; D011188:Potassium; D014461:Ultracentrifugation / Q000295:instrumentation*
chemical_list: D002951:Citrates; D011108:Polymers; D002586:Cesium; D005947:Glucose; D011188:Potassium