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Xenopus neurula cells were cultured in a medium that contained ammonium salts, amines, polyamines or alpha-methylornithine, and their rRNA synthesis was examined. All the ammonium salts and amines, but not polyamines, were strong and selective inhibitors of rRNA synthesis at 1.25-5.0 mM. alpha-Methylornithine did not inhibit rRNA synthesis, although it inhibited ornithine decarboxylase, an enzyme claimed to be a direct stimulator of rRNA synthesis. During the treatment ammonium ions and monomethylamines were accumulated within the treated cells. However, monomethylamines did not induce the accumulation of ammonium ions, and vice versa. Ammonium salts and amines also selectively inhibited rRNA synthesis in Xenopus borealis neurula cells.
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
March 1984,
Cell structure and function,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
January 1978,
Development, growth & differentiation,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
October 1982,
Developmental biology,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
August 1973,
Developmental biology,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
November 1982,
The Journal of experimental zoology,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
January 1988,
Journal of molecular evolution,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
September 1979,
Biochimica et biophysica acta,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
July 2013,
Peptides,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
February 1984,
Experimental cell research,
K Shiokawa, and
Y Kawazoe, and
K Tashiro, and
K Yamana
October 1990,
Nucleic acids research,
