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Su Y, Wang L, Fan Z, Liu Y, Zhu J, Kaback D, Oudiz J, Patrick T, Yee SP, Tian X, Polejaeva I, Tang Y. 161 Establishment of bovine induced pluripotent stem cells. Reprod Fertil Dev 2021; 34:318-319. [PMID: 35231370 DOI: 10.1071/rdv34n2ab161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Y Su
- Department of Animal Science, Institute of Systems Genetics, University of Connecticut, Storrs, CT, USA
| | - L Wang
- Department of Animal Science, Institute of Systems Genetics, University of Connecticut, Storrs, CT, USA
| | - Z Fan
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Y Liu
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - J Zhu
- Department of Animal Science, Institute of Systems Genetics, University of Connecticut, Storrs, CT, USA
| | - D Kaback
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA
| | - J Oudiz
- Department of Animal Science, Institute of Systems Genetics, University of Connecticut, Storrs, CT, USA
| | - T Patrick
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - S P Yee
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA
| | - X Tian
- Department of Animal Science, Institute of Systems Genetics, University of Connecticut, Storrs, CT, USA
| | - I Polejaeva
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Y Tang
- Department of Animal Science, Institute of Systems Genetics, University of Connecticut, Storrs, CT, USA
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Abstract
During the cell cycle in Saccharomyces cerevisiae there is an ordered appearance of a number of enzymes and various physiological properties but a continuous increase in the rate of rRNA synthesis. A detailed study of rRNA synthesis has shown that there are reiterated genes for rRNA which are largely clustered on chromosome I and appear to be transcribed continuously during the cell cycle. However, the level of activity of polymerase I is proportional to the level of rRNA during the cell cycle and is correlated with the growth rate of the culture. In contrast, the level of polymerase II, thought to be involved in mRNA synthesis, increases during a definite period of the cell cycle characteristic of step enzymes in yeast. It would appear that the level of the activity of polymerase I is involved in the regulation of rRNA synthesis. Possible other mechanisms for the regulation of rRNA are discussed.
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