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restriction endonuclease是什麼意思,restriction endonuclease的意思翻譯、用法、同義詞、例句

輸入單詞

常用詞典

  • 限制酶,限制性内切核酸酶

  • 例句

  • The recombinant plasmid PET- 11D-ospC was identified with restriction endonuclease analysis and sequencing.

    采用酶切分析及序列測定等方法鑒定重組質粒的正确性。

  • In this study, a detailed restriction map was constructed using multiple groups of restriction endonuclease analysis.

    本研究利用多種組合的酶切分析,繪制了較為詳細的酶切圖譜。

  • Results PCR, restriction endonuclease method and direct sequence analysis demonstrated that plasmids of YMDD, YVDD and YIDD were constructed successfully.

    結果經PCR方法、酶切鑒定及直接測序鑒定出YMDD、YVDD和YIDD質粒構建成功,且該方法具有較好的敏感性和特異性。

  • Methods PCR and DNA sequencing were performed to study the AR gene mutation; Mbo I restriction endonuclease was used to detect existence of the mutation in normal controls;

    并對發現突變的基因進行分析。方法 應用PCR擴增、DNA序列測定等技術分析所有AR基因外顯子及其鄰近DNA序列片段;

  • Restriction enzyme:Protein (more specifically, an endonuclease) produced by bacteria that cleaves DNA at specific sites along its length.

    限制性内切:由細菌産生的一種蛋白質,能在特定的地方切斷去氧核糖核酸分子。 收藏。

  • Finally, we could evaluate plasmids cDNA extracted with mono-restriction endonuclease enzyme and the agar gel electrophoresis.

    最後用限制性内切酶單酶切及瓊脂凝膠電泳進行鑒定。

  • Methods:DNA sequencing and restriction endonuclease reaction was used.

    方法:采用DNA測序及限制性酶切反應方法。

  • Finally, the cloned B antigen gene was identified by restriction endonuclease analysis, DIG probe hybridization and DNA sequencing.

    通過内切酶分析、*********(DIG)—探針原位雜交、DNA序列測定,确認克隆的B抗原基因正确。

  • Janpanese encephalitis virus; recombinant plasmid; DNA sequencing; restriction endonuclease analysis.

    流行性乙型腦炎病毒;重組質粒;DNA測序;限制性内切酶分析。

  • CP4-EPSPS gene was amplified from 13 samples, but all of them were proved to be false positives in restriction endonuclease digestion analysis of PCR products.

    有13個樣品在CP4-EPSPS基因檢測中雖擴增出類似陽性對照的條帶,但對PCR産物的進一步酶切鑒定表明,所有擴增結果為假陽性。

  • Result Restriction endonuclease digestion and sequencing showed that the modification of the sense mutation of OSCP gene can be successful.

    結果酶切及測序顯示對OSCP基因有義突變部分的糾正獲得成功。

  • Methods DNAs were extracted from the white blood cells of people in Hainan by salt-out method. Polymerase chain reaction and restriction endonuclease was used to determine the 4533G/A polymorphism.

    方法用鹽提取法提取人群中白細胞的DNA,以聚合酶鍊反應、限制性内切核酸酶檢測-4533G/A多态性。

  • Secondly, the preamplified DNA fragments were digested by a restriction endonuclease to form sticky ends, which were then ligated to a designed DNA adapter by ligase.

    然後用限制性内切酶将其消化成短片段,在連接酶的作用下與設計的DNA適配器相連;

  • The overlap extension mediated by restriction endonuclease to obtain the full length gene was established.

    建立一種用於克隆全長基因的、限制性内切酶介導的重疊延伸法 。

  • Then, we analyzed the specificity of PCR primers through digesting PCR products with restriction endonuclease.

    然後對擴增産物進行限制性酶切反應;

  • After a restriction endonuclease cleavage, two expected smaller fragments were observed.

    經限制性内切酶反應,獲得兩個預期大小的片段。

  • Result The recombinant was correctly constructed and restriction endonuclease analysis and PCR amplification.

    結果 經酶切鑒定及基因測序證實重組三突變型穿梭質粒構建成功。

  • 同義詞

  • |restriction enzyme;限制酶,限制性内切核酸酶

  • 專業解析

    限制性内切酶(Restriction Endonuclease)是一種在分子生物學中至關重要的酶,其核心功能是識别DNA分子上的特定核苷酸序列(稱為限制性位點或識别位點),并在該序列内部或附近切割DNA雙鍊。以下是詳細解釋:

    1. 定義與核心功能

      • 限制性 (Restriction): 這一名稱源於其生物學起源功能——細菌用來“限制”或防禦外來DNA(如噬菌體病毒DNA)入侵的一種機制。細菌自身的DNA則通過甲基化修飾得到保護,不會被自身的限制酶切割。
      • 内切酶 (Endonuclease): “内切”指該酶能在DNA分子内部的特定位置切割磷酸二酯鍵,從而将DNA鍊切斷。這區别於在DNA鍊末端進行切割的“外切酶”。
      • 因此,限制性内切酶是一種由細菌産生,能在DNA雙鍊内部特定序列處進行切割的酶。
    2. 識别與切割特性

      • 高度特異性: 每種限制性内切酶都有其嚴格識别的特定短核苷酸序列(通常為4-8個堿基對),這個序列通常是回文結構(即正讀和反讀序列相同,如EcoRI識别5'-GAATTC-3')。
      • 切割方式: 切割後會産生特定的末端:
        • 粘性末端: 最常見的切割方式。酶在識别序列的兩條鍊上交錯切割,産生帶有短單鍊突出(黏性末端)的DNA片段。例如,EcoRI切割産生5'-G和AATTC-3'的突出末端。
        • 平末端: 酶在識别序列的兩條鍊上對稱切割,産生平齊的末端。例如,SmaI識别CCCGGG并平切。
    3. 生物學意義與應用

      • 天然功能: 在細菌中,限制性内切酶與甲基化酶共同構成限制-修飾系統(R-M系統),是原核生物的一種免疫防禦機制,用於降解入侵的外源DNA。
      • 分子生物學革命性工具: 限制性内切酶的發現和應用是重組DNA技術的基石。它們使得科學家能夠:
        • DNA克隆: 切割載體DNA(如質粒、病毒DNA)和目的DNA片段,利用相同的粘性末端或平末端進行連接,構建重組DNA分子。
        • 基因作圖: 通過酶切産生不同長度的DNA片段,用於繪制DNA限制性圖譜。
        • DNA測序: 在桑格測序法等早期方法中用於制備片段。
        • 基因工程: 對基因進行體外操作的基礎工具。
        • 診斷: 用於限制性片段長度多态性分析等遺傳病診斷技術。

    權威性來源參考:

    網絡擴展資料

    Restriction endonuclease(限制性核酸内切酶)是分子生物學中的關鍵酶類,其定義、功能及相關信息可綜合如下:

    1.定義與基本特性

    2.分類與命名

    3.應用領域

    4.補充說明

    如需進一步了解其具體作用機制或曆史發現,可參考分子生物學教材或專業數據庫。

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