Back to Search
Start Over
Isopycnic zonal centrifugation and characterization of the mouse mammary tumor virus (MTV) in different gradient solutions
- Source :
- Virology. 40:912-919
- Publication Year :
- 1970
- Publisher :
- Elsevier BV, 1970.
-
Abstract
- The buoyant density of MTV in several different gradient solutions was determined, using a single pool of MTV-infected milk as the source of virus. Increased ultraviolet absorbance and detectable MTV B-particle antigenicity correlated with the positions of discrete light-scattering bands formed during centrifugation. MTV isodensities were found to be similar to those reported for other RNA tumor viruses. Centrifugation of MTV-positive preparations in preformed gradients containing sucrose or potassium tartrate resulted in the formation of two distinct light-scattering bands. Electron microscopic examination showed that only those bands at the higher buoyant density contained characteristic MTV particles. The bands of lower isodensity consisted of viruslike particles having considerable variability in size and shape, which may represent incomplete MTV particles. The properties of isopycnically centrifuged MTV-free milk samples were clearly distinguishable from those of MTV-positive samples; no discrete light-scattering bands were formed, and no viruslike particles were observed in electron micrographs.
- Subjects :
- Immunodiffusion
Sucrose
Antigenicity
Potassium tartrate
Morphology (linguistics)
Ultraviolet Rays
Potassium
Cesium
chemistry.chemical_element
Biology
Mice
chemistry.chemical_compound
Chlorides
Virology
Spectrophotometry
parasitic diseases
Centrifugation, Density Gradient
medicine
Animals
Centrifugation
Tartrates
Chromatography
Staining and Labeling
medicine.diagnostic_test
Immune Sera
RNA
Phosphotungstic Acid
Rubidium
Microscopy, Electron
Milk
Mammary Tumor Virus, Mouse
Isopycnic
chemistry
Female
Rabbits
Oncogenic Viruses
Subjects
Details
- ISSN :
- 00426822
- Volume :
- 40
- Database :
- OpenAIRE
- Journal :
- Virology
- Accession number :
- edsair.doi.dedup.....4e619ca7bdc49236e965a45320e32ec2