transforming dna 中文意思是什麼

transforming dna 解釋
轉化dna
  • transforming : 重排
  • dna : 1. deoxyribonucleic acid 【生物化學】去[脫]氧核糖核酸。2. deoxypentose-nucleic acid 去[脫]氧戊糖核酸。
  1. In this paper, first strand cdna of 3abc gene was synthesized using template rna extracted from cells infected with fmdv. the complete 3abc gene about isoobp was amplified by pcr and ligated into pgem - t easy vector. after transforming e. coli dh5 a, ampicillin resistant colonies were isolated and plasmid dna was prepared and analyzed by restriction analysis and pcr. presence of the full length 3abc gene was verified by nucleotide sequence analysis and the plasmid containing the expected sequence was named as pgem - 3abc. comparing the aquired sequence of 3abc with that of reference strains, the homology is more than 99 percent. the pgem - 3abc was digested with sal i and bgl ii and ligated into xho i and bgl ii - digested expression vector ptriex - 4 neo. lt was identified by restriction analysis and pcr and sequencing that this fragment had a 17bp deletion hi the nucleotide sequence 708bp of 3abc gene, which happened to form a terminator codon behind 3ab gene, but it contained the complete open reading frame ( orf ) of 3ab gene. positive clones were selected and induced with lmmol / l isopropyl - d - galactoside ( iptg ), bacteria were detected by sds - page and western blotting after properly treated. the results showed that the 3ab gene expressed successfully in e. coli and 33. 5ku fusion protein can be recognized by the positive bovine serum of fmdv. the amount of target protein is over 26 % of the total bacteria protein by gel thin layer scanning analysis

    擴增產物連接到pgem - teasy載體中，轉化大腸桿菌dh5菌株，篩選氨芐青霉素抗性菌落，提取質粒經酶切鑒定、 pcr分析以及確證性測序證明，所克隆的1500bp左右的片段含有完整的3abc基因，與國外參考序列相比，同源性在99以上。將重組質粒pgem - 3abc和表達載體ptriex - 4neo分別用sal和bgl與xho和bgl消化后，亞克隆3abc基因至原核表達載體ptriex - 4neo中，通過酶切鑒定、 pcr擴增以及序列分析，發現克隆到ptriex - 4neo載體上的片段於3abc基因708bp處出現了17bp的缺失，碰巧在3ab基因后形成一終止密碼子，但3ab基因的閱讀框架完整，選出含有3ab基因完整閱讀框架的陽性克隆，用iptg誘導表達，收集菌液進行sds - page電泳、 westernblotting分析，結果表明， 3ab基因在大腸桿菌中成功表達，其表達產物為分子量33 . 5ku的融合蛋白，並能被口蹄疫病毒陽性血清識別。經薄層掃描分析，表達量占總蛋白量的26以上。
  2. Conclusion : by restriction enzyme secting, ligating, transforming, restriction enzyme analysis, and final dna sequencing, the pbd - i and pbd - ii gene were proved to be recombinated with the expression vector and the recombinated vector ppd - 1 and ppd2 were transformed successfully

    結論：經過酶切、連結，構建成重組質粒ppd上、 ppd上，再經轉化、抽提質粒及酶切分析，最後經dna測序證實， rticr擴增的pbd i 、 pbd 11基因與piflpdt 」 xsi表達載體構建成功。
  3. Hsp70, a kind of molecular chaperone, has the main functions of taking part in protein folding, protein degredation and reparation of dna damadge and has important effects on the constructure and function of mitochondria. it has already been proved that there is a close correlation between hsp70 and the development of plants and animals. this paper deals with integrating sense and antisense cdnas of hsp70 into tobacco dna by constructing an expression vector of sense and antisense cdnas of hsp70 and gene - transforming methods - genegun bombarding and agrobacterium mediation. provided expression of hsp70 gene is inhibited by sense and antisense cdnas of hsp70 we can get male sterile plants so as to prove that antisense cdna of hsp70 leads to male sterility 1

    Hsp70是一種分子伴侶，主要功能是參與細胞有關蛋白新生肽的折疊、亞基組裝、細胞內運輸、蛋白質降解及dna損傷的修復，對線粒體結構和功能發揮重要作用，已有研究證明hsp70與動植物的發育有密切的關系，本研究將hsp70正、反義cdna構建成表達載體，並運用基因槍和農桿菌介導法將hsp70正、反義cdna導入煙草，試通過hsp70反義cdna抑制hsp70基因的表達從而創造雄性不育株，以證明hsp70反義cdna能創造雄性不育系。
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