ION REGULATION IN TETRAHYMENA
نویسندگان
چکیده
منابع مشابه
Regulation of Microtubules in Tetrahymena
Experiments are reported which were designed to test for induced synthesis of microtubule proteins associated with the rapid proliferation of basal bodies and associated intracytoplasmic microtubules which occurs during oral replacement in Tetrahymena. None was found. Instead, it is shown that these structures can be formed with de novo synthesis of as little as 6% of their microtubule proteins...
متن کاملRegulation of ribosomal RNA synthesis in Tetrahymena pyriformis.
Ribosomal RNA is synthesized at constant rate during most of the cell cycle in heat-shock synchronized populations of Tetrahymena pyriformis. Early in each macronuclear S-period the rate of synthesis increases abruptly, concomitant with replication of the genes coding for ribosomal RNA. The increase is prevented by inhibitors of DNA replication, added prior to the S-period. Similarly, in cultur...
متن کاملRegulation of cellular osmolarity and volume in Tetrahymena.
Freshwater Protozoa are hyperosmotic to their environment. Direct determinations of intracellular osmolarity on Amoeba proteus and Pelomyxa carolinensis have given values between 101 and 117 m-osmole/kg cells, when the external osmolarity was 2-8 m-osmole/1 (Lovtrup & Pigon, 1951; Riddick, 1968; Schmidt-Nielsen & Schrauger, 1963). No measurements were made of intracellular osmolarity in respons...
متن کاملTranscriptional regulation of gene expression in Tetrahymena thermophila.
The only well-characterized study of gene expression in Tetrahymena thermophila (1) demonstrates that the temperature dependent expression of the Ser H3 gene is regulated at the level of mRNA stability. A run-on transcription assay was developed to determine if regulation of RNA stability was a major mechanism regulating gene expression in Tetrahymena or if transcriptional regulation dominates....
متن کاملPositive and negative regulation of Tetrahymena telomerase holoenzyme.
Telomerase replenishes the telomeric repeats that cap eukaryotic chromosome ends. To perform DNA synthesis, the active site of telomerase reverse transcriptase (TERT) copies a template within the integral telomerase RNA (TER). In vivo, TERT and TER and additional subunits form a telomerase holoenzyme capable of telomere elongation. We previously purified epitope-tagged Tetrahymena thermophila T...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1961
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1539465