dna restriction 中文意思是什麼

dna restriction 解釋
dna限制
  • 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。
  • restriction : n. 1. 限制，限定。2. 拘束，束縛；自製。3. 【邏輯學】限定。
  1. The pcr product was inserted into expression plasmid pet - 32a ( + ) after restriction digest. then the recombinant plasmid was identified by endonuclease analysis, pcr ampliation and dna sequencing. the report showed that the recombinant plasmid had right open reading frame

    重組質粒經酶切鑒定， pcr鑒定和測序，結果證實豬肺炎支原體黏附因子p97基因的抗原決定簇r1區定向插入了質粒pet - 32a （ + ） ，且閱讀框架正確。
  2. Two primers, designed according to the conserved regions of ban gene in arabidopsis thaliana, were used to amplify the ban homologous fragments from the genomic dna of brassica napus, b. chinensisl, b. juncea, a. thaliana and other cultural plants of cruciferae. the very similar pcr fragments were obtained from all the amplifications, which implicated that ban may be a conserved gene existing widely in the genomes of cruciferae. pcr fragments were cloned and confirmed by restriction enzyme digestion

    參照擬南芥（ arabidopsisthaliana ） ban基因與cdna設計引物，對甘藍型、白菜型、芥菜型油菜，擬南芥及其它十字花科栽培品種的基因組dna進行pcr擴增，均擴增出與擬南芥ban基因擴增片段大小極其相似的dna片段，提示ban可能廣泛存在於十字花科植物中。
  3. Large dna molecules are first dissected with restriction enzymes to produce specific fragments.

    首先用限制性內切酶將大的DNA分子切斷，產生出特殊的片段。
  4. Mouse ; restriction fragment length polymorphism ; dna fingerprint ; probe jl - 02 ; es cell

    小鼠限制性片段長度多態性dna指紋圖jl - 02探針胚胎幹細胞
  5. 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。
  6. Based on the structure and function analysis of hirudin, a potent thrombin inhibitor, and some platelet aggregation inhibitors, which contain the recognition sequence argglyasp as their functional motif, two chimeric antithrombotic molecules were designed by introducing rgd sequence to hirudin cterminus. these chimera genes were constructed by pcr and inserted into the expression vector pet21a, the constructs were confirmed by restriction enzyme digestion and dna sequence analysis. these recombinant plasmids were transformed into

    經限制酶消化和dna序列分析，證明兩種重組質粒與設計完全一致。由於rgd -水蛭素嵌合基因上游連接了金黃色葡萄球菌蛋白a spa的信號肽序列，在iptg誘導下兩種嵌合分子都獲得了分泌表達，表達產物主要集中在細胞周質空間。
  7. 1. because the taxonomic division is rather complex and has been much disputed and revised, in this part, we will review the classification and phylogeny of families, subfamilies and tribes of anseriformes based on morphology, ethology, osteology, mitochondrial and nuclear dna restriction fragment length polymorphism, single - copy nuclear dna hybridization and the sequences of mitochondrial gene analysis referring to the different definition, classification and phylogenetic relationships of the families, subfamilies and tribes of anseriformes. the controversial questions and deficiency in the systematic studies of anseriformes were pointed out

    具體包括以下幾個部分： 1 、針對雁形目鳥類異常復雜的分類狀況及分類上存在的爭議，根據雁形目鳥類的形態學、行為學、骨骼學、角蛋白、線粒體與核dna酶切片段長度多態、單拷貝核dna - dna雜交及線粒體基因dna序列分析等方面的研究，對雁形目鳥類分類中科、亞科和族的劃分及其相互間的系統發生關系進行綜述，分析系統學研究中存在的不足，提出了雁形目鳥類分類中急需解決的問題。
  8. Culture of mg7 hybridoma cells and detection of antigen - binding affinity of mg7 mab by elisa 2. construction and identification of mg7 recombinant phage antibody library mrna was isolated from cultured mg7 hybridoma cells and converted into cdna ; the variable fragments of heavy and light chain were separately amplified and assembled into scfvs with a specially constructed dna linker by pcr. the scfvs dma was ligated into the phagmid vector pcantabse and the ligated sample was transfered into competent e. co / / tg1 to generate a bacterial form of mg7recombinant phage antibody library ; volume and recombinant ratio of the library were evaluated by means of bacterial colony counts and restriction analysis ( ecor i and hind iii )

    Mg _ 7重組噬菌體抗體庫的構建及鑒定從培養的mg _ 7雜交瘤細胞中提取並分離mrna ，反轉錄成cdna ；利用pcr分別擴增mg _ 7單抗的重鏈及輕鏈可變區基因，並通過? dna連接子將二者連接起來形成mg _ 7單鏈抗體基因；將mg _ 7單鏈抗體基因插入pcantab5e ；將連接產物轉化感受態tg1大腸桿菌，制備細菌形式的mg _ 7重組噬菌體抗體庫；通過菌落計數和限制性酶切分析（ ecor和hind ）評估mg _ 7重組噬菌體抗體庫的容量和重組率。
  9. To search proteins that associate with the mouse mint protein and regulate notch signaling in nuclei, and to study the function and mechanism of mint - mediated transcription repression, yeast two - hybrid assay was used to screen proteins that interact with a fragment of mint ( f5, amino acids 2226 - 2959 ). from 4x106 yeast clones transformed with the bait plasmid and a cdna library of 9 dpc mouse embryo, fifty - one were positive for nutritional screening and p - galactosidase assay. restriction digestion identified 10 independent positive clones and these were analyzed by dna sequencing these clones represent 3 correctly fused cdna fragments, which are mint, alpha a - crystallin - binding protein i ( alphaa - crybpl ), and nuclear receptor co - repressor 1 ( n - corl ), respectively

    鑒于mwt基因編碼區較長，共有10799個堿基，故此我們將mint分為六段，分別命名為fi一f6 ，本研究以其中的f5 （ 222e959 ）和f6 （ 296s576 ）片段為研究對象，將h者分別插入pgb盯7載體中，結果顯示： mintfs可與核受體輔助抑制因子1階cori ） ， o晶狀體蛋白結合蛋白1hlphatcrybp入及mw加互作用，而f6可與igm的重鏈恆定區、泛素結合酶2l6和一個未知功能的新的蛋白基因進行結合。
  10. Restriction enzymes and dna probes are used to determine the exact sequence, but it is possible to get a rough estimate by analyzing the frequency of recombination between the alleles of linked genes

    雖然可以利用限制性內切酶和dna探針精確的分析出特定序列，但是在分析連鎖基因等位基因間的重組序列時，會出現不準確的估計。
  11. We found that sit variant gene ( slt2vha ) was identified in strains e. coli o157 : h7 isolated from patients and dung beetles 2000 in xuzhou city, jiangsu province. the primers used for stx2 variant analysis are shown in tablel. genomic dna restriction fragments digested by pstiwere sonthern - blotted and hybridized with an stx2 - specific dna probe. the probe was prepared fromed a 285 - bp pcr productof the strain 882364 stx2 gene obtained by using the specific primer pair ( tablel )

    2000年在江蘇省徐州市銅山縣腹瀉病患者的糞便標本分離的10株產生志賀毒素的菌株以及從蜣螂腸道分離到的4株產生志賀毒素的大腸桿菌o157 ： h7 ，屬于另兩個pfge型，和1986 、 1987 、 1988年在徐州市腹瀉病患者的糞便標本分離的菌株pfge圖譜不同。
  12. Restriction fragment lenth polymorphism ( rflp ) analysis n random amplified polymorphic dna analysis [ rapd ], the sequence analysis of internal transcribed spacers ( its ) of ribosomal dna ( rdna ), induction of microcyclic conidiation, sem ( scanning electron microscopy ) ascosporal isolation and other methods were applied to study more than 100 specimens or isolates of cordyceps, its anamorphs and other entomogenous fungi

    本文採用了rapd 、 rdnaits的rflp 、 rdna的its序列分析、誘發微循環產孢、掃描電鏡觀察、子囊孢子分離等方法研究了蟲草及其他蟲生真菌的100多個標本或菌株。
  13. 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 。
  14. Errors intrinsic to the testing systems, such as the inability to precisely measure dna restriction fragment lengths, are well compensated for by interpretation guidelines which take these kinds of errors into account

    鑒定系統本身固有的誤差，如不能精確的測量dna限制酵素片段長度，可以由解釋規則來很好的彌補，因為解釋規則會考慮到這些種類的誤差。
  15. Then, the plasmid was transformed into jm109. the full length pstvd cdna recombinant plasmid was further identified by restriction mapping analysis and the nucleotide sequence of cdna cloned in pmd 18 - t vector was analyzed with ab1 377 dna sequence. test showed that the cdna of this chinese pstvd isolate was the same as pstvd - kf - 6 mild " type " isolate which originated from naturally infected potatoes in field of cornell university potato breeding program

    利用rt - pgr技術，設計一對引物，對田間採集的經鑒定含pstvd的陽性樣品進行全序列擴增，並將所得產物純化回收，連接到pmd18t - vector中，並轉化至大腸桿菌jm109中，挑選白斑進行雙酶切（ saci / ecorv ）鑒定證明插入片段為359bp大小，進行序列測定，所得克隆基因為pstvd全序列負鏈，大小為359bp 。
  16. The dissertation consists of five chapters : in chapter one, the recent progress in molecular approaches in systematic studies of macroalgae e. g. dna extraction, restriction endonuclease fragment length polymorphisms ( rflps ), random amplified polymorphic dna ( rapd ), gene sequencing, intersimple sequence jepeats ( issr ), amplified fragment length polymorphisms ( aflp ) and single strand. conformation polymorphisms ( sscp ) were reviewed

    本論文由五部分組成：在第一部分，綜述了大型海藻dna的提取、限制性片段長度多態性（ rflps ） 、隨機擴增多態性dna （ rapd ） 、核酸序列分析、擴增片段長度多態（ aflp ） 、單鏈構象多態（ sscp ）等分子手段在大型海藻系統學研究中應用的一些進展。
  17. The hinf i restriction enzyme digestion gave rise to restriction fragment length polymorphism ( rflp ) of the pcr products. when there were two dna fragments of 363bp and 305bp were produced from a pcr product, the strains were assumed to have a mutation at ser83, when three fragments of 363bp, 206bp and 99bp were produced, the strains were assumed to have no mutation at the 83or 116. the results indicated that certain mutation of ser 83 abolished a hinf i restriction enzyme site and may be detected as a rflp

    本研究重點分析了16株菌對氟喹諾酮類（ fqns ）藥物的耐藥性，結果表明： 16株菌對諾氟沙星、環丙沙星、沙拉沙星、單諾沙星和氧氟沙星等（ nor 、 cip 、 sar 、 dan 、 ofl ）的耐藥率在31 . 3 - 56 . 3之間。
  18. The aflp ( amplified fragment length polymorphism ) technique is based on the selective pcr amplification of restriction fragments from genomic dna digested by restriction enzymes completely

    擴增片段長度多態性技術（ aflp ）是基於選擇性擴增完全酶切消化后的基因組dna片段。
  19. After pcr checking and electro - transformation plasmid from c. elegans into dh5a, isolating plasmid from dhsct, digesting them with restriction enzymes and dna sequencing, six cdna fragments, which protein products can interact with rapgap, from cdna library were got

    將pcr擴增陽性及或lacz強陽性質粒電轉化入dhsa細菌，提取質粒后酶切、測序。發現有6個來源於celegqnscdna文庫的dna片段編碼的蛋白可以與ra帥ap相互作用，其中兩個為rapgap 。
  20. A dna fragment of 348 - bp amplified from the b subunit gene was cut into two dna fragment of 216 and 132 - bp by haelli. endonuclease restriction analysis of the plasmid content with psti showed that strainas with the same result of southern - blot with spesific probe had the different cleavage pattern. the isolated 285 - bpand 348 - bp dna was ligated with plasmid puc18. the ligation mixture was used to transform e. coli jm109and the transformants were plated on lb agar containing antibiotics. plasmid dna containing cloned genes were used for direct sequencing

    提示1999年的疫情由不同的病原菌引起。另外使用針對志賀毒素2及其變種的引物對進行pcr檢測、細菌染色體pst和pcr產物的hae 、 ras酶切分析，以及pcr產物的序列分析，發現2000年從江蘇省徐州市患者和家畜家禽糞便標本分離的大腸桿菌o157 ： h7菌株僅僅攜帶slt2vha基因。
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