dna clone 中文意思是什麼

dna clone 解釋
dna克隆技術
  • 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。
  • clone : n. 1. 【生物學】純種細胞，無性系。2. 復製品；（幾乎）一模一樣的人。3. （不動腦筋）機械行事的人；機器人。vt. 把…培養為純種細胞；無性繁殖；〈比喻〉復制。
  1. In our experiment, the specific fragment was amplified from transgenic bobwhite genome dna at annealing temperature 61 by using high - fidelity pfu dna polymerase and cloned into clone vector pgem - 7fz ( + ), then sequenced. the cloned sequence was completely identical to the sequence which was issued in genbank

    本實驗採用了高保真pfudna聚合酶，在退火溫度61條件下從轉基因bobwhite品種基因組dna中擴增出特異性片段，將此片段插入克隆載體pgem - 7fz （ + ） ，經測序和序列分析表明，所擴增得到的片段含有bar基因完整的讀碼框，並且序列與genbank中發表的序列完全一致。
  2. 4. the construction of middle - clone vector and expression vector the puc - cp and pgem - 7z plasmid were digested by kpnl and bamhi, and collected the digested cpti fragment and the pgem - 7z, then ligated by t4 dna ligase and formed the pgem - cp

    中間載體及表達載體的構建將puc - cp質粒和pgem ? 7z質粒，用kpni和bamhi酶切，分別回收cpti片斷和酶切后的載體片段，用t _ 4連接酶連接構建成中間載體pgem - cp 。
  3. Sub - - clone of s, . / hbsag fusion gene : pbuescripts, . / hbsag and ppiczaa were digested separately by xhoi and xbai enzyme, and were linked under t4 dna ligase, ppiczaa s, / hbsag was constructed and transformed to e. coli

    Hbsag質粒與ppiczaa載體分別經xhol和xbaln切，再在t4dna連接酶作用下進行連接，獲得工程菌表達型ppiczaas ； hbsag質粒，轉化大腸桿菌t0p10細胞，經xhol和xbal與sacll和xbal酶切電泳，證實s ； 。
  4. To clone large and random dna fragments, the second generation of yac, pjs97 - pjs98 was modified as gene replacement vector in streptomyces

    4kb和1 . okb片段，而且還插入了勿，七刃j和spc心t廠抗性基因。
  5. The donkey - adapted strain of eiav ( dv116 ), parental strain of eiav - dla, is a highly virulent isolate which was developed by sequential passaging a virulent eiav strain in donkeys in 1970s. the donkeys inoculated with fatal doses of eiav d strain can always be killed within in the first acute disease period. in this study, we constructed a full - length provirus dna clone of dv116 by pcr

    本實驗中將eiav驢強毒dv體外感染驢白細胞培養物，一定時間后收獲病毒（本文中簡稱dv116 ） ，提取eiav前病毒dna ，以pcr法分別擴增並克隆了包含全長基因的三段前病毒dna片段，以雙脫氧法測定了dv116病毒全基因序列共8236個核苷酸。
  6. At first, 1. 67 u g per well mcab all was coated on three wells of a plate, and then 1. 5 x 1011 phage virion was diluted and added, after incubating with the target, wash away unbound phage by tbst ( 0. 1 % tween - 20 ), the bound phage was eluted with ph 2. 2 tris - gly buffer and amplified, the specially bound phage was enriched by taking through addition binding / amplification cycles. ln the following cycles, the stringency of panning can be increased by raising the concentration of tbst or decreasing that of mcab all, collecting and titering the washing phage of last time and output phage in each round, the selective ratio and the false positive rate of each round were worked out, the gradually increasing of selective ratio and decreasing of positive rate shows that the panning was effective. after 4 rounds of panning, 11 phage clones were selected after competitive - ellsa, the dna samples of 8 positive clones and 1 negative clone were sequenced and all the foreign peptides inserted was also deduced, a clear consensus binding sequence emerged

    在本實驗中，利用隨機12肽庫對抗豬瘟病毒（ classicalswinefeverviruscsfv ）糖蛋白me2的單抗a11進行表位篩選，經過四輪篩選以後，隨機挑取11個克隆作競爭- elisa檢測，結果表明，所挑11個克隆中，有9個克隆能對me2蛋白和a11反應產生抑制作用，抑制率最高可達64 ； dna測序以後經過dnastar軟體分析，發現它們的核心序列為anwralsl ，該核心序列與豬瘟病毒e2蛋白的28 - 35位氨基酸ttwkeysh具有同源性；夾心- elisa檢測和western - blotting試驗均證明所挑陽性克隆能被a11所識別；人工合成含核心序列的多肽經間接elisa試驗證實，也能被a11識別。
  7. Objective : construct high - level expression system of echistatin in e. coli methods : obtain amino - acid sequence of echistatin from genebank database. considering the bias of usage of 61 available aminoacid codons in e. coli, design the coding sequence of echistatin, synthesize the dna sequence chemically, get single copy coding gene and repeated two copy coding gene of echistatin. insert the sequence into expression vector pbv220, and more, we construct fusion expression clone of echistatin with pcr, identify the recombinant vector by dna sequencing

    目的構建蛇毒鋸鱗蝰素（ echistatin ）的原核高效表達體系方法由genebank數據庫檢索蛇毒鋸鱗蝰素（ echistatin ）的氨基酸序列，結合大腸桿菌蛋白質合成體系對氨基酸密碼子使用的偏愛性，設計了echistatin編碼基因，體外人工合成編碼基因dna片段，通過適當的限制性內切酶位點插入表達載體pbv220 ，分別構建了echistatin的單拷貝表達克隆、雙拷貝串聯表達克隆；進一步通過pcr技術構建echistatin的融合表達基因克隆。
  8. The total rna was purified from the germ in the liquid by the guanidine isothiocyantehod method, then the total rna digested by dnase that had not rnase was used for rt - pcr. i change the magnesium ion dencity in the pcr system in order to optimize the pcr condition. at the end i selected the magnesium ion density as 1. 25 mm. the production of rt - pcr was inserted directionally into pgem ? z ( ampr ). the pgem ? z ( ampr ) was used to transform e coli jm109. i got a positive clone through culling and identificatin. the dna sequence inserted into pgem ? z ( ampr ) was sequenced and blasted with the cdna sequence of the # - mannanase mature peptide that got from genbank

    分取誘導培養液中的菌體，用異硫氰酸胍法提取總rna ，總rna再經無rna酶的dna酶處理後用于rt ? pcr 。在pcr擴增目的基因時，通過優選擴增體系，使鎂離子濃度為1 . 25mm時rt ? pcr可順利地獲得目的基因，並能定向克隆到載體pgem ? 3z （ amp ~ r ）中。用克隆載體轉化宿主大腸桿菌jm109 ，通過篩選獲取陽性克隆子，對陽性克隆子進行酶切與pcr鑒定，並對載體中插入的目的基因進行測序。
  9. In this study, we designed a pair of primers based on the sequence of the upstream and downstream of chicken il - 2 gene. about 600 bp chicken il - 2 cdna fragment was cloned from cona - stimulated chicken splenocytes by reverse transcription - polymerase chain reaction ( rt - pcr ) and was subcloned into puc18 vector. recombinant clone was demonstrated by restriction enzyme digestion and dna sequencing. next, we construct recombinant plasmid pproex ? t - il - 2. the cdna of chicken il - 2 gene was subcloned into bamh i / hind iii sites of vector. the recombinant plasmid pproex ? t - il - 2 was transformed into e. coli dh5a and the bacteria was induced with iptg. it was demonstrated by sds - page and western blot that a 18kda protein which was equal to chicken il - 2 protein in molecular weight was expressed in e. coli dh5a. the expression level was up to 30 % of the total bacterial proteins. the purified protein was used to prepare the antibody against chicken il - 2 protein

    經酶切鑒定及dna序列測定，該基因為雞il - 2基因，其序列與sundick等報道的完全一致。在此基礎上，我們把雞il - 2基因亞克隆到大腸桿菌原核表達載體pproex ~ （ tm ） ht中，構建重組表達質粒並進行確證性序列測定，重組質粒測序結果表明將編碼雞il - 2成熟蛋白的基因正確地插入到原核表達載體pproex ~ （ tm ） ht的目的位點。重組質粒轉化受體菌dh5後用iptg於37進行誘導培養， sds - page和westernblot分析顯示，表達的雞il - 2融合蛋白分子量約為18kda ，表達的融合蛋白經薄層掃描發現目的蛋白表達量約占菌體蛋白的30 。
  10. Selected one of the 14 strains - s93, s93 dna was digested partially with sau3a i and 2 ~ 3kb fragments were collected and inserted into puc 18, then transformed into dh5 a. filtering the clone with hybridization in situ, a 1 kb frament clone has been cloned

    使用sau3ai對基因組dna進行不完全酶切，回收2 3kb片段，與puc18質粒連接轉化大腸桿菌，利用地高辛標記探針，使用菌落原位雜交篩選轉化子；篩選到包含有約1kb外源片段的轉化子。
  11. Correct clones were selected and plasmid dna was isolated and digested with saci and puvii. a dna fragment of about 2. 1kb was purified and labeled by dig - 11dutp as probe. at least 40 positive clones were obtained from human genomic library by in situ colony hybridyzation with this probe. among them one clone contains human serum album dna by sequence

    以pcr擴增的人血清白蛋白（ hsa ）基因片段為探針，從人的基因組文庫中雜交篩選的陽性克隆中，經測序分析，有一個克隆含有全長hsadna ，用從其它的陽性克隆中選取兩種dna片段，即dna修復基因hfen1和一段非編碼大片段cit987sk - 384d8 ，與人hsadna一起，進行顯微共注射，成功制備了轉多基因小鼠。
  12. After electrophorised on 1 % agarose gel, the pcr production was purified with agarose gel dna extraction kit. the segment was ligated with vector pmd18 - t and then was tranformed into the competent cell of dh5 a. a construction mstnd - pmd18t was generated by inserting the sequence of 254bp into pmd18 - t vector and selecting the sense clones. positive clone was identified by three ways : endonuclease digestion, pcr and sequencing. the result showed that the cloned sequence coincides with the designed sequence. this construction was digested with nco i and xho i and ligated the pet28a ( + ) vector digested with the same enzymes using dna ligation kit. the production of ligation reaction was transformed into the competent cell of bl21 ( de3 ). after 12 - 16 hours of culture, several colnes appeared on the plate. some positive clones were selected to extract their plasmid. these plasmids were digested by nco i and xho i and indentified by pcr. a contraction, mstnd - pet28a was generated. the result showed that the cloned sequence coincides with the designed sequence

    F _ 1長38bp ， r _ 1長36bp ，其它片段均40bp長， f _ 1和r _ 1片段兩端分別加上限制性內切酶nco和xho的識別位點序列。用成對單鏈片段進行延伸反應，然後用其他單鏈片段作為引物，進行pcr擴增，用dna快速純化回收試劑盒回收所得254bppcr產物，與pmd18 - t載體連接、轉化dh _ 5 。受體菌感受態細胞，利用藍白斑遺傳學篩選法篩選陽性克隆，提取其質粒，採用nco和xho雙酶切鑒定，獲得了254bp的片段；用pmd18 - t載體上的特異引物rv - m和m13 - 47進行pcr鑒定，獲得300bp的片段。
  13. Some other properties of the strain and the protease were discussed in detail. total dna of strain dy - a was extracted and clone of the protease gene was in progress

    通過以上的研究，該菌株有望成為進一步研究低溫堿性蛋白酶的出發菌株，在基礎研究和工業生產上有較大的應用潛力。
  14. The distribution and amount analysis of these bacteria in different layers of core sediment indicated that there was an intact cycle that coupled sulfur metabolism with methane metabolism existed in this area, which may be the microbial response to the environment because there was seldom similar bacteria detected from " manganese nodule " area sediment by dna - dna hybridization with specific oligonucleotide probe and 16s rdna clone library analysis

    而16srdna克隆文庫分析和dna - dna雜交的結果表明「結核」區沉積物中這兩類細菌數目很少，說明「暖池」區沉積物中的微生物群落結構特徵是對環境因素的一種響應，同時也可能是影響該海區深海及海洋環境的一個重要因素。
  15. The 3. 4kb ecori dna fragment of the pgxn201 and the mutant ecori dna fragments of the three mutant plasmids were subcloned into the ecori sites of the clone vectors ml3 and the pgem3z - f ( + ) respectively. through dna sequencing and dna sequence analysis by comparing with the bradyrhizobium japonicum dna sequences reported, we found that there are four intact open reading frames in the 3. 4kb fragment and it was highly homologous to the bradyrhizobium japonicum dna sequence reported, and the tn5gusa5 containing in the pgxn217 was inserted in one of the four open reading frames. this open reading frame located on about 5. 5kb upstream of the nfec gene, which includes 207bp nucleotides, coding 68 putative amino acids and this is completely identical to that of the bradyrhizobium japonicum dna sequence reported

    本研究首先利用轉座子tn5gusa5對重組質粒pgxn201進行誘變，獲得3 . 4kbecori片段插入了tn5gusa5的突變質粒pgxn215 、 pgxn216 、 pgxn217 。對這些突變質粒進行亞克隆及測序分析並與基因庫中已報道的慢生型大豆根瘤菌的dna序列作比較，發現突變質粒pgxn217中tn5gusa5恰好插入在一個未知功能的開放閱讀框架內。將pgxn201的3 . 4kbecori片段與m13作連接，獲得亞克隆pgxn201c ，對pgxn201c進行測序分析，發現與基因庫中已報道的慢生型大豆根瘤菌的dna序列有95的同源性。
  16. Some characteristics of cold - active protease and chitinase were analyzed then. microbial 16s rdna ( ribosomal dna ) clone libraries of deep sea sediments were constructed and studied by pcr - rflp ( restriction fragment length polymorphism ) and phylogenetic analysis based on 16s rdna sequences. the microbial diversity and community structures of deep sea sediments collected from two different sea area including the west pacific " warm pool " and the east pacific " manganese nodule " area, as well as the interaction between microbial community and environment, were analyzed based on these studies

    通過構建沉積物中微生物16srdna克隆文庫，採用pcr - rflp分析、 dna - dna雜交、 16srdna序列測定以及系統發育分析的方法，研究了兩太平洋「暖池」區和東太平洋「結核」區兩個不同海區深海沉積物中的微生物多樣性和群落結構特徵及其與環境的相互關系，得到了一些與「暖池」區環境特點緊密相關的新發現，新認識。
  17. The purpose of this thesis was to clone two different group 3 lea genes. on one hand, we designed and synthesized a pair of degenerate primers according to the foreign reports. a 500bp dna fragment was obtained with pcr technique from the dna of highly drought - resistant china leymus

    一方面，參照國外報道幾種植物的第三組lea中的hva1基因的相對保守的氨基酸序列，設計併合成一對兼并引物，提取抗旱、耐鹽性強的羊草的dna ，採用pcr技術，擴增出了495bp的一段基因片段。
  18. Main works and their important results are showed as following. firstly, the cdna encoding bullfrog gh is amplified by use of the total rna, extracted from adult bullfrog ' s pituitary, as the template, pi ( 5 ' - cggatcc atg gct tca ggg tta ggc ) and p2 ( 5 ' - cgaattc tta aaa ggt gca gtt gct ) as the primer pair and one particular cdna product, 660bp, was obtained after the rt - pcr - the product was purified by using dna agarose gel extraction method. after the purified cdna and pmd18 - t vector were ligated at 16 over night, the ligation products were transformed into e. coli strain dh5a and then the transformants were screened by clone pcr method

    首先，以成體牛蛙的腦垂體總rna為模板，進行rt ? pcr擴增得到約660bp的特異性pcr產物帶，切下瓊脂糖凝膠中的特異產物帶進行cdna膠回收，將cdna與pmd18 ? t載體進行t ? a克隆連接並轉化到dh5 e . coli后，進行菌落pcr 、質粒酶切鑒定，篩選出陽性菌株，測序結果經blast分析，與已報道的牛蛙生長激素基因高度同源，證實此陽性克隆為牛蛙生長激素基因轉化子，命名為pbfgh 。
  19. And the two pah ' s of pcr primers that bind to the adapter and the sequence of f fragment close by tn5 respectively were also designed. the genomic dna of b8 was isolated, digested with bamh i, and ligated to the adapter. using the two pairs of the primers, two rounds of pcr were performed hi turn and a fragment of 239bp was amplified successfully. lt was proved by cloning and sequencing that 18bp of the fragment is the sequence opposite to f fragment on the left of tn5 insertion site in b8f, the other is part of the 728 bp of f fragment. this result makes it possible to continue to carry out chromosome walking, to clone and sequence the whole genes of b fragment and f fragment, and to reveal the antagonistic molecular mechanism of b8

    試驗研究設計併合成了由40和44個堿基的寡聚脫氧核苷酸組成的染色體爬行接頭，在接頭序列和測定的f片段近tn5的序列上，設計了2對染色體爬行用的pcr引物，從b8菌株中提取基因組dna ， bamhi酶切，與染色體爬行接頭連接，依次用2對引物進行pcr ，擴增出239bp產物，經克隆、測序，發現其中18bp為擴增的相應于f片段在b8f菌株tn5插入位點對面的序列，其餘則為f片段728bp序列的一部分，為進一步進行染色體爬行，克隆和測定整個b和f基因，揭示陽菌株的拮抗分子機制提供了技術資料貯備。
  20. Scientists are eager to conduct dna tests to see if eve is truly a clone baby

    科學家急欲以dna測試，檢驗夏娃是否真為復制寶寶。
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