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Separation of lymphocyte chromatin into template-active fractions with specificity for eukaryotic RNA polymerase II or prokaryotic RNA polymerase.
- Source :
- Proceedings of the National Academy of Sciences of the United States of America; December 1975, Vol. 72 Issue: 12 p4830-4834, 5p
- Publication Year :
- 1975
-
Abstract
- When chromatin prepared from WI-L2 lymphocytes by low salt extraction and shearing is centrifuged on a glycerol gradient, one area of the gradient yields chromatin enriched in template activity for Escherichia coli DNA-dependent RNA polymerase (EC 2.7.7.6; nucleosidetriphosphate:RNA nucleotidyltransferase) as compared to Saccharomyces cerevisiae RNA polymerase II (or B). Another area yields chromatin preferred by the eukaryotic enzyme. Kinetic studies indicate that the differences in activity cannot be explained by differences in affinity of the enzymes for the various templates. The DNA isolated from either fraction has a molecular weight of 8.5 X 106. The "yeast active" fraction seems enriched in proteins. Mixing experiments indicate that the yeast enzyme does not alter the template in such a way as to improve it for the bacterial enzyme.
Details
- Language :
- English
- ISSN :
- 00278424 and 10916490
- Volume :
- 72
- Issue :
- 12
- Database :
- Supplemental Index
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Periodical
- Accession number :
- ejs60440324
- Full Text :
- https://doi.org/10.1073/pnas.72.12.4830