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Analysis of RNA transcription from isolated mouse liver chromatin has been undertaken by means of RNA-excess hybridizations with small amounts of radioactive DNA. This analysis indicates that mouse liver chromatin is a restricted template for the in vitro synthesis of RNA complements to repetitive DNA, but more RNA species are synthesized than are found in the RNA isolated from mouse liver nuclei. Extraction with 0.5 M NaC1 destroys the template restriction of isolated chromatin. RNA synthesized in vitro from DNA or chromatin templates by Escherichia coli RNA polymerase, as well as in vivo mouse liver nuclear RNA, were each hybridized to 125I-labeled DNA of high, intermediate, or low reiteration frequency. Chromatin-primed and nuclear RNA saturate a smaller portion of each DNA fraction than does DNA-primed RNA. However, chromatin-primed RNA saturates more high and low reiteration frequency DNA than does nuclear RNA. Simultaneous hybridization of nuclear-and chromatin-primed RNA with 125I-labeled DNA indicates that chromatin-primed RNA contains all of the sequences present in nuclear RNA. Extraction of chromatin with 0.5 MNaC1 leads to removal of histone F1, as well as a wide variety of non-histone proteins. When used as a template for in vitro RNA synthesis, such salt-extracted chromatin produced RNAs that hybridize as large a portion of each DNA fraction as does DNA-primed RNA.
L T Bacheler, and
K D Smith
January 1975,
Biochimie,
L T Bacheler, and
K D Smith
May 1979,
Archives internationales de physiologie et de biochimie,
L T Bacheler, and
K D Smith
April 1978,
Nucleic acids research,
L T Bacheler, and
K D Smith
January 1978,
Molekuliarnaia biologiia,
L T Bacheler, and
K D Smith
March 1976,
Proceedings of the National Academy of Sciences of the United States of America,
L T Bacheler, and
K D Smith
April 1978,
Experimental cell research,
L T Bacheler, and
K D Smith
April 1973,
Proceedings of the National Academy of Sciences of the United States of America,
L T Bacheler, and
K D Smith
February 1978,
Cell,
L T Bacheler, and
K D Smith
December 1973,
Proceedings of the National Academy of Sciences of the United States of America,
L T Bacheler, and
K D Smith
May 1975,
Nucleic acids research,
