DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Ryu, Dewey D. Y. | - |
dc.contributor.advisor | 유두영 | - |
dc.contributor.author | Choi, Young-Chul | - |
dc.contributor.author | 최영철 | - |
dc.date.accessioned | 2011-12-12T08:55:52Z | - |
dc.date.available | 2011-12-12T08:55:52Z | - |
dc.date.issued | 1983 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=63685&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/28154 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생물공학과, 1983.2, [ vi, 57 p. ] | - |
dc.description.abstract | The stability of ColEl-trp recombinant plasmid was studied in Escherichia coli mutant strains. MV12/pVH5 trp$^+$ strains were stable during the cultivation up to stationary phase regardless of the composition of medium. In death phase, trp$^-$ cells were generated at a frequency of 1\% and one of 4 trp$^-$ cells had three modified plasmids and the rest had no plasmid. When MV12/pVH5 trpR$^+$ strain was cultivated in chemostat culture without tryptophan, stability of the plasmid was maintained at 100\% until 50 generation times. In glucose-limited chemostat culture, trp$^-$ cells began to appear after about 30 generation times and they were enriched in the culture medium due to the higher growth rate than trp$^+$ cells. In MV12/pVH5 tna$^-$ strains and in the cultivation with indoleacrylic acid ($30\mu$g/ml), the stability was decreased by about 10\%. In these conditions, trp$^-$ cells showed the heterogeneous profile of plasmids whose sizes were smaller and/or 2-3 times larger than original ColEl-trp plasmid. However, in MV12/pVH5 trpR$^-$ strains, the stability of the plasmid was decreased by about 95\% because trp$^-$ cells were enriched in the culture medium due to the higher growth rate than trp$^+$ cells, and the trp$^-$ cells were lossed their entire plasmids. In trp$^-$ cells which appeared in death phase, the interconversion between trp$^+$ and trp$^-$ cells was detected and it is believed that this event was related to the expression of trp operon. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.title | Instability of trp operon recombinant plasmid in E. coli | - |
dc.title.alternative | E. coli 내 trp operon recombinant plasmid 의 불안정성에 관한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 63685/325007 | - |
dc.description.department | 한국과학기술원 : 생물공학과, | - |
dc.identifier.uid | 000811285 | - |
dc.contributor.localauthor | Ryu, Dewey D. Y. | - |
dc.contributor.localauthor | 유두영 | - |
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