| Literature DB >> 4141598 |
D L Fine, L O Arthur, J K PLOWMAN, E A Hillman, F Klein.
Abstract
An in vitro system for production, purification, and concentration of mouse mammary tumor virus is described. Monolayer cultures of C(3)H mouse mammary tumor cells propagated at 34 C in roller bottles in the presence of dexamethasone, a glucocorticoid hormone, release B-type particles which possess ribonucleic acid and a ribonucleic acid-dependent deoxyribonucleic acid polymerase. One thousandfold concentration by ultracentrifugation with subsequent gradient fractionation yielded > 7 x 10(10) particles per ml in the 1.16- to 1.18-g/ml region. Mouse mammary tumor virus produced in this system was free of detectable C-type virus.Entities:
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Year: 1974 PMID: 4141598 PMCID: PMC186879 DOI: 10.1128/am.28.6.1040-1046.1974
Source DB: PubMed Journal: Appl Microbiol ISSN: 0003-6919