http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Helicobacter pylori 편모 유전자의 클로닝 및 염기서열 분석
이광호,이우곤,조명제,도영미,백승철,강경희,박필성,이상룡 경상대학교 유전공학연구소 1993 遺傳工學硏究所報 Vol.12 No.-
A λgt11 expression libary of H. pylori DNA in E. coli Y1090 was screened with flagellin-specific rabbit antiserum for molecular cloning of the flagellin gene of H. pylori. A positive clone, λHPF4, was obtained and the recombinant antigen expressed from λHPF4 was a fusion protein with the molecular weight of 168kd. Sequence analysis of antigen-encoding DNA showed that an open reading frame composed of 1,536 nucleotides encodes a polypepride with a oredicted molecular size of 54kd. This open reading frame did not show the homology with flaA gene encoding 56kd protein of H. pylori and was confirmed as a unique sequence through homoligy searching. Therefore, the cloned antigen is supposed to be the carboxy-terminal region of the other flagellin protein of H. pylori, flaB, with the molecular weight of 58kd.
우상규,정선미,이상기,안병윤,김희철 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3
Transglutaminase(TGase Ⅱ)는 펩타이드-결합 글루타민 잔기와 펩타이드-결합 라이신잔기 및 1차 아민류를 포함하는 다양한 화합물과의 교차결합에 의하여 단백질의 변형을 촉매하는 효소이다. 동물세포에는 구별가능한 5종류의 TGase가 존재한다[TGase Ⅰ(또는 K), Ⅱ(C), Ⅲ(E), Ⅳ(P)와 혈장단백 ⅩⅢa]. 그들은 아미노산 서열에서 N-말단에 약 70%의 상동성을 갖고 있으며, C-말단의 경우에는 거의 상동성이 부위(N-말단 2/3)와 비상동성 부위(C-말단 1/3 부위)의 역할을 알아보기 위해 전체효소 또는 C-말단이 결손된 형태의 효소를 Saccharmoyces cerevisiae에서 발현 하고자 하였다. Southern blot, 역전사 중합 연쇄 반응, Western blot등을 통해 전체효소 및 C-말단 결손형 효소가 형질전환된 효모에서 발현되는 것을 확인하였다. Succinylated casein에 [1,4-^14C]-putrescine이 통합되는 반응을 이용한 활성 측정에서 C-말단이 결손된 TGase Ⅱ는 같은 세포 농도에서 전체 TGase Ⅱ 효소와 비교하여 유사한 수준의 활성을 나타내었다. 이러한 결과들은 사람 TGase Ⅱ의 경우 N-말단의 높은 상동성부위가 효소의 역가결정에 중요하다는 것을 나타내 준다. 효모시스템에서 발현한 결과 효소의 역가가 나타났으나 높지 않았으며 발현된 양이 극히 낮아서 단백질의 정제나 특성연구를 위하여 발현벡터의 개량을 포함한 방법의 개선이 필요하다고 사료된다. 흥미롭게도 TGase Ⅱ의 발현이 효모의 성장을 저해하는 것으로 나타나 이러한 현상이 표피세포의 각질화에 수반된 세포의 죽음과 유관한지의 가능성에 대한 보다 자세한 연구가 필요하다. In an effort to understand the role of the conserved domain and of the heterologous one-third part of the carboxy terminal domain of transglutaminase C (TGase Ⅱ), attempts were made to express TGase Ⅱ cDNA of human origin in yeast Saccharmoyces cerevisiae as in a full-length form as well as in a form of C-terminal truncation. The 2μ-based expression plasmids which contained the TGase Ⅱ cDNA under the gal inducible promoter were introduced into yeast and the maintenance of the full-length and truncated form of the TGase Ⅱ gene plasmids were confirmed by Southern blot. The expression of e results indicate that the N-terminal homologous domain of human TGase Ⅱ retains a catalvtically active domain. The level of TGase Ⅱ expressed in yeast, however, was far lower than satisfactory and other expression system should be sought further characterization of the enzyme. The negative effect of TGase Ⅱ on the growth of yeast is interesting with respect to the physiological effect of TGase Ⅱ in the cornification f epidermal keratinocytes.
朴愚喆,李光熙,金進鎬,李麟九,曺晋基 慶北大學校出版部 1987 慶北大農學誌 Vol.5 No.-
This experiment was conducted to search for Rhizobia with good nitrogen fixation abilities and to investigate their physiological characteristics isolated from 12 soybean cultivars and the affinities of root nodule bacteria with soybeans. The results obtained were as follows ; Based on colors, Rhizobia grown on YMA medium were divided into 3 groups, i. e., white, translucent and transparent, amounting to 60, 30 and 10%, respectively. In litmus milk reation, the strains which produced alkali, acid serum, alkaline serum and acid reached to 51, 29, 9 and 11%, respectively. Strains, S022, and S096 were slow-growers and produced alkaili, while strains, S080, S090, and S118 were fastgrowers and produced acid. The growth of root nodule bacteria on YMA medium was favorable between the initial pHs of 6.0~7.0. Glutamine, asparagine and allantoin as nitrogen sources enhanced the growth of root nodule bacteria. All the strains tested formed nodules on the soybean roots, and the strains with good symbiotic nitrogen fixation abilities that had white color, small colony, nitrate reduction abilities and no nitrite reduction abilities showed comparatively high nitrogen fixing activities. Some strains varied in nitrogen fixing activities according to soybean cultivars, and a few strains formed ineffective nodules which showed no nitrogen fixing activity.
李宇榮,李炳熙 경북대학교 사회과학대학 1984 社會科學 Vol.3 No.-
No philosopher has been more influential than Marx, and no one has been more misunderstood, distorted and transformed. There are also many reasons why philosophical thought of Marx has remained hidden, even up to our day, at least in a partial obscurity. Important reasons can be as follows 1) Marx tried to link Praxis and concepts of Praxis. So unlike other philosophers Marx tried to build his theory on Praxis (Feuerbach These 11) 2) Marx uses the terms and words that appears like a bat. And so it is not easy to translate his true meaning into general theory 3) Although springing from Marx, Marxists often followed its own course independent of Marxist original thought. At any rate, in order to understand today's Marxism (Co-operative work of Marx and Marxists), it is indispensable to investigate the original intuitions of Marx. Essential problems are Marx's philosophical orientations i.e. the thoughts of young Marx. Roughly speaking, Marx's general thought comes from his original thought evident in his early writings. He places a stress on the role of ideas in history in his works from 1818∼1845, quite contrary to the work of maturity. In contrast with later writings, Marx develops his positive view on importance of ideas, especially, alienation in capitalist society. Many questions arise. Is there a continuity between young Marx and mature Marx? If not so, which is 'true' Marx? Is young Marx is related to older Marx? Is young Marx meaningless? Are a still idealistic Marx and views which his will soon slough off appeared in young Marx? Though most Marxists interpret these problems in wide variety, it is desirable to investigate young Marx and older Marx consistently. To conclude, this phenomenon suggests indirectly that Marx's theory is a good deal more emotive than a scientic treatise. 'Scientific' socialism, as Marx ardenty advoated, is dead, but Marx's feeling of social responsibility and his love for freedom and human beings must survive.
Helicobacter pylori와 대장균의 Shuttle Vector 개발
조명제,이우곤,이상룡,김경희,안영숙,김성희,김현주,류복덕,최여정,윤영혜,백승철,전영석,이광호 경상대학교 유전공학연구소 1997 遺傳工學硏究所報 Vol.16 No.-
In this study, a vehicle vector using cryptic plasmids was constructed for gene transfer in Helicobacter pylori. pHP51(3.9 kb) and pHP489(1.2 kb) were selected for constructing vectors from cryptic plasmid of H. pylori isolates in Korea. The HindⅢ-digestedDNA fragment(1.2kb) of pHP489 and 1.6kb DNA fragment of pHP51 were ligated with a kanamycin resistance gene(aph3'-Ⅲ) from C. jejuni to produce the recombinant plasmids pHP489K and pHP51K, respectively. Transformation frequency of pHP51K by electroporation was low. But pHP489K could be effectively transformed into various H. pylori strains. In order to design an intermdiate vehicle vector for gene transfer into H. pylori, pBlueHP489K was prepared by recloning pHP489K DNA into pBluescript and pTZ19R vector. This vector permitted the DNA fragment containing pHP489 sequence, aph3'-Ⅲ, and cloned DNA to be cut and self-ligated in the SacⅠ site after cloning. ureA and ureB gene were inserted into pBlueHP489K, resulting in pBlueHP489K/AB. The DNA fragment containing pHP489, kanamycin resistance gene(aph3'-Ⅲ), and urease structural gene was cut away from pBlueHP489K/AB and self-ligated to generate pBlueHP489K/AB. pBlueHP489K/AB made urease-negative H. pylori strains restore their urease activity. By this experiment, pBlueHP489K was confirmed to be the vehicle system for transferring H. pylori genes.