title: Enhancing factor for Rous sarcoma virus: in vitro assay and action on both cells and virus.
mesh_terms: D000327:Adsorption; D000818:Animals; D001354:Avian Leukosis Virus / Q000254:growth & development; D001358:Avian Sarcoma Viruses / Q000187:drug effects* / Q000254:growth & development; D002471:Cell Transformation, Neoplastic / Q000187:drug effects; D002478:Cells, Cultured / Q000187:drug effects*; D002499:Centrifugation, Density Gradient; D002642:Chick Embryo; D003911:Dextrans / Q000494:pharmacology; D005615:Freezing; D006133:Growth Substances / Q000302:isolation & purification / Q000494:pharmacology*; D014020:Tissue Extracts; D014316:Tritium; D014357:Trypsin; D014465:Ultrasonics; D014529:Uridine; D014776:Virus Cultivation
chemical_list: D003911:Dextrans; D006133:Growth Substances; D014020:Tissue Extracts; D014316:Tritium; D014357:Trypsin; D014529:Uridine