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Nucleic Acids Research, 1977, Vol. 4, No. 12 4261-4278
© 1977

Articles

The SV4O transcription complex. I. Effect of viral chromatin proteins on endogenous RNA polymerase activity

Timothy L. Brooks and Melvin H. Green

Department of Biology, University of California San Diego. La Jolla, CA 92093, USA

Received September 12, 1977. SV40 chromatin obtained from infected monkey cells was used to study the effect of the viral chromatin proteins on endogenous RNA polymerase II. Ammonium sulfate activated the rate of transcription by endogenous RNA polymerase in two ways: 1) by direct action on the enzyme; and 2) by causing a reversible conformational change in the viral chromatin. Under optimal reaction conditions, the viral chromatin proteins did not limit the rate of RNA chain elongation, and high molecular weight RNA (1.6 x 106d) was synthesized by the SV40 chromatin.


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