double strand dna 中文意思是什麼
double strand dna
解釋
雙鏈dna-
Mms, a kind of dna - damaging agent, predominantly methylates ring nitrogens of pyrine, leading to dna double - strand breaks, point mutation and so on
甲磺酸甲酯（ methylmetbanesulfonate ， mms ）是一種能夠損傷dna的烷化劑，主要使dna嘌呤堿基上的o 、 n甲基化，造成dna雙鏈斷裂、點突變。 -
In this experiment, dna double strand breaks induced by heavy ions in the early period were investigated with atomic force microscopy ( afm )
本實驗旨在用原子力顯微鏡（ afm ）研究重離子輻射后早期的dna雙鏈斷裂。 -
The damage of dna is the most basic and important sector in this process. meanwhile, the double strand breaks ( dsb ) of dna molecule is the primary damage of all biological effectiveness induced by ionizing radiation
Dna的輻射損傷是其中最基本和最關鍵的一環，而dna的雙鏈斷裂（ dsb ）又是輻射引起的各種生物學效應中最重要的原初損傷。 -
By means of the afm made in shanghai aijian co., ltd. and digital instruments co., ltd ( u. s. ), the dna strand and their fragments were observed successfully. 2. by comparison with afm experiments of three categories of ion beams, the result has been observed in qualitatively : in the uniform dose, the higher let heavy ions have caused more double strand breaks than the lower let radiation
通過afm對實驗結果的觀測，可以定性地得知：在同等劑量條件下，高let值的重粒子與低let的射線相比， dna雙鏈斷裂的數目要多一些；在相同let條件下，隨劑量增加dsb的片段變短、數量增加。 -
Recently, a new gene dr0167 ( pprl or irre ) that serves as a general switch for downstream dna repair and protection pathways via its regulatory function on the gene expression of reca, ppra was discoveried. expression of d. radiodurans pprl also promotes dna repair and protection pathways and enhances the radioresistance of e. coli. this finding provides a new clue to understand the mechanism of dna repair, especially double strand break ( dsb ) repair
最近我們實驗室在耐輻射球菌電離輻射敏感株中鑒定了一個與電離輻射抗性相關的基因ppri ，該基因可能通過調控dr細菌reca 、 ppra等基因的表達加速對電離輻射引起的dna損傷修復，而在大腸桿菌中表達ppri基因能促進reca 、 soda等表達水平顯著提高，使其抗輻射和抗氧化能力明顯增強，這將為我們理解其特殊抗性機制，特別是雙鏈斷裂修復提供新的線索。 -
In this study, the suitable parameters for the introduction of plasmids phz1358 and pset152 into s. nanchangensis ns3226 from e. coli were tested for developing an conjugation system for s. nanchangensis ns3226. a dnd gene cluster, which encodes an unknown modification system for 5 hvidans 1326 and renders its dna susceptible to site - specific double - strand dna cleavage during electrophoresis was conjugated from e. coli into s. nanchangensis ns3226
將克隆在整合型載體pset152上的變鉛青鏈黴菌1326的dnd基因簇通過接合轉移導入野生型南昌鏈黴菌ns3226中進行異源表達，觀察到接合轉移子的dna獲得了在含fe ~ （ 2 + ）的電泳緩沖液中電泳時降解的表型。 -
Exponential phase cultures of the dr rl strain survive exposure to gamma radiation at doses as high as 5, 000 gy without loss of viability or evidence of dna damage induced mutation. 6000 gy of irradiation will induce approximately 200 dna double - strand breaks in dr chromosomes, but it is still able to reconstruct a functional genome from chromosomal fragments without any mutation
指數生長期的r1菌株即使在5kgy劑量的-射線照射后，其生長能力也未受影響， 6kgy -射線照射后染色體基因組產生約200個的雙鏈斷裂碎片，但是其基因組dna經修復后沒有引起任何的突變。 -
Dna, or deoxyribonucleic acid, is the substance ? specifically, a nucleic acid molecule with a twisted double strand double helix form ? that carries the genetic information for humans and other living organisms from one generation to the next
Dna即脫氧核糖核酸，是一種雙螺旋鏈核酸分子，它攜帶人類及其他生物的遺傳信息，使其代代相傳。 -
Hmre11 plays an important role in u937 cellular response to dna double - strand breaks following etoposide
雙鏈斷裂后的修復中發揮重要作用 -
The dna double strand break ( dsb ) can be rejoined by at least two discrete pathways, i. e., the homologous recombination and the nonhomologous end - joining. at least 10 genes were found involved in nhej
Rad18是一種單鏈dna結合蛋白，具有許多泛素系統e3所有的典型ring結構，與rad6 （ ubc2 ）形成結合緊密的異二聚體。 -
This unusual modification causes wild type s. lividans 1326 dna sensitive to site - specific oxidative double - strand cleavage ( dnd phenotype ). preliminary study revealed that such dna modification involves incorporation of sulphur. the entire functional dnd cluster, 8. 3kb in size, including 3 orfs - dnda, dndb and dndc was involved in this dna modification
野生型變鉛青鏈黴菌具有一種不同於甲基化修飾的新型dna硫修飾系統，使dna在電泳時易遭到氧化雙鏈切割而導致降解（ dnd ， dnadegradation ）表型（ zhouetal . ， 1988 ， 1994 ， 1999 ） 。 -
3. dna double strand breaks ( dsbs ) induced by ion beams of gel electrophoresis experiment has shown positive linear with dose, i. e., double strand breaks will increase as the dose increased
分子生物學技術? ?電泳技術分析結果表明，離子輻射造成的dna雙鏈斷裂（ dsb ）與粒子劑量呈線性正相關關系，即隨著粒子劑量值增大， dsb量也逐漸上升。 -
A novel dna modification discovered in streptomyces lividans is different from dna methylation. this unusual modification causes wild type s. lividans dna sensitive to site - specific oxidative double - strand cleavage ( dnd phenotype, dna degradation )
變鉛青鏈黴菌的dna異常修飾系統是一種不同於甲基化修飾的新型修飾系統，它可使變鉛青鏈黴菌dna在電泳時易遭到氧化雙鏈切割（ dnd表型， dnadegradation ） （ zhouetal . ， 1988 ） 。 -
To investigate the silence effect of hela cells " telomerase gene expression after shrna based on human telomerase htert transfected into cells. methods : we constructed a partial double - strand dna with t7 promoter as dna template and synthesized small hairpinrna in - vitro using t7 rna polymerase
方法：根據端粒酶htert基因1573 ? 1591位的核酸序列，構建帶t7啟動子的部分雙鏈dna模板，用t7rna聚合酶體外合成短鏈shrna 。 -
Conclusions : the in - vitro method that partial double - strand dna with t7 wi l. - toi promoter sequence as template and synthesizing by t7 rna polymerase can product high yield, excellent purity shrna. lt is a convenient -, effective ^ low - cost method and fit for small rna synthesis and rna interference researches in ordinary laboratory
結論：以帶t7啟動子部分雙鏈dna為模板，用t7rna聚合酶體外合成出的shrna產量較高，純度較好，是一種簡便、高效、低成本的短鏈rna的制備方法，適合於普通實驗室用來進行短鏈rna的合成和rna干擾實驗。 -
Numerous lesions that include sugar alteration, base damage, and single - and double - strand breaks together with dna - dna crosslinks have been identified in irradiated dna. dna double strand breaks ( dsbs ) are considered as the most important initial damage of all biological effects induced by ionizing radiation
電離輻射可引起dna多種類型的損傷，如堿基損傷、糖基損傷、單鏈和雙鏈斷裂以及dna交聯等，其中雙鏈斷裂（ dsb ）是輻射所致生物效應中最重要的原初損傷。
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