transversion 中文意思是什麼
transversion
解釋
（顛換）：指一個嘌呤被嘧啶代替或相反的突變。-
The substitution of a purine for a pyrimidine, or vice versa is a transversion.
嘌呤為嘧啶取代或嘧啶為嘌呤所取代，叫做顛換。 -
( 3 ) the data support that roe deer ( capreolus capreolus ) moved into hydropotinae ( presently in which there is only one species : hydropotes intermix ) and stemed its own independent genus ; ( 4 ) the results are object to the usual standpoint that dusky musk deer and alpine musk deer are two different species ; ( 5 ) it is more reasonable that moschidae ( musk deer ) is placed at the level of super family ; ( 6 ) the number of transition within 12s rrna is within the range of 2 to 20 times bigger than that of transversion ; ( 7 ) as to nucleotide composition, adenine ( a ) is much more abundant than any of other bases ( averagely 36. 88 % ) and guanine ( g ) is the least ( averagely 17. 65 % ) in the complete sequence, which is similar with the loop region
（ 4 ）黑麝與馬麝的12srrna基因序列完全相同， 12srrna基因數據不支持黑麝與馬麝為兩個種。 （ 5 ）本實驗結果支持麝作為上科的分類階元存在。 （ 6 ） 12srrna基因的堿基代換中轉換數遠遠大於顛換數（ 2 - 20倍） （ 7 ） 12srrna基因二級結構中，全序列核苷酸的堿基組成腺嘌呤（ a ）最多（平均為36 . 88 ） ，鳥嘌呤最低（平均17 . 65 ） ，與環區的堿基組成相類似。 -
Transversion has the bias of a t and t a, and always happen in the 3rd position
顛換的發生主要以t - a ， a - t為主，大都發生在密碼子第三位。 -
Among the nucleotides substitution of cytb, transition is obviously higher than transversion
斑翅蝗cytb基因中核苷酸的替代轉換明顯高於顛換。 -
( 8 ) the substitution rate in loop regions is 2. 24 times of that in stem regions. the transition rate is almost same ( 0. 051 and 0. 082 ), compared with the results that the transversion rate of loop regions is the 12. 67 times of that of stem regions
（ 8 ）環區的所有核苷酸堿基代換率為莖區的2 . 24倍，轉換率幾乎相同（ 0 . 051和0 . 082 ） ；而環區的顛換率卻高達莖區的12 . 67倍。 -
In e coli, dna polymerases are key enzymes involved in two distinguished pathways contributing to untargeted mutagenesis. replication of dna by pol v ( umuc ), in the presence of umud1, reca and single strand binding protein ( ssb ), is highly mutagenic and exhibits a predominant mutation pattern of base transversion. another error prone polymerase involved in untargeted mutagenesis is pol iv, encoded by dinb gene
在umud ' ， reca和單鏈結合蛋白ssb的協助下， polv （ umuc ）能在單鏈模板上催化dna合成並產生高頻率的以堿基顛換為主要形式的突變；另一個與非定標性突變有關的易誤dna聚合酶是pol ，為dinb基因的編碼產物。 -
Sequence variation analysis exhibits high transition to transversion substitution ratios, and transitions and transversions are unsaturated in the sequence of cytochorme b gene. the base composition of the cytochrome b sequences was highly biased. using a structural model of the cytochrome b protein as a template, we divided cyt b sequence data for species within anserifomes into three functional domains
3 ）序列具有較高的轉換顛換比，基因序列中的轉換與顛換都未飽和，序列中的堿基組成高度偏倚： 4 ）按照細胞色素為蛋白結構模型，細胞色素b基因全序列可分為三個功能區，堿基替換飽和狀況與不同功能區相關聯。 -
The average transition : transversion ratio was 1. 0 which indicated the genetic differentiation was great. the ration was 2 in nuclear dna gene. as a rule the ts : tv ratio decreased with the increasing genetic distance
1數據分析軟體，構建蚜總科蚜蟲分子系統樹，探討這些類群這間的分類地位和親緣關系，這在國內外尚屬首次。 -
However, marked high transition / transversion was found on loop e. this could be caused by the presence of pseudogenes. in the spacer region, elements related to tra
長度差異體現在基因間隔區，而基因區極端保守， 「基本為120hp 。 -
The results showed : ( 1 ) in the d - loop of mtdna genome from 18 individuals, there were only transition and transversion, were not insertion and deletion, and the frequency of transition was higher than transversion ; ( 2 ) and nucleotide diversity was 0. 0011, the sequence divergence values among haplotypes was 0. 005
研究結果顯示： （ 1 ） 18隻大鴇的301bp - 330bpmtdna控制區序列的突變只有轉換和顛換，無插入和缺失，且轉換的頻率高於顛換； （ 2 ）核苷酸多態性只有0 . 0011 ，不同單元型間的序列差異值為0 . 5 。
分享友人