Conditions for optimal MTV synthesis in vitro and the effect of steroid hormones on virus production.

Adrenal Cortex Hormones/pharmacology Animals Carbon Radioisotopes Cell-Free System Centrifugation, Density Gradient Culture Techniques Desoxycorticosterone/pharmacology Dexamethasone/pharmacology Dose-Response Relationship, Drug Hydrocortisone/pharmacology Immunodiffusion Mammary Neoplasms, Experimental Mammary Tumor Virus, Mouse/enzymology,growth & development,metabolism Mice Mice, Inbred Strains Microscopy, Electron RNA, Viral/biosynthesis RNA-Directed DNA Polymerase/metabolism Stimulation, Chemical Uridine/metabolism Virus Replication/drug effects

Adrenal Cortex Hormones Carbon Radioisotopes RNA, Viral Desoxycorticosterone Dexamethasone RNA-Directed DNA Polymerase Uridine Hydrocortisone