堿基顛換 的英文怎麼說
中文拼音 [jiǎnjīdiānhuàn]
堿基顛換
英文
base transition-
Phylogenetic analysis surports that anseranas should be placed in monotypic family anseranatidae, and the whistling ducks and the white - backed duck should be separated from subfamily anserinae and placed them into family dendrocygnidae. the family anatidae could be classified into two subfamilies, anserinae and anatinae. the results approve that the swans should be put into the tribe cygnini of subfamily anserinae as suggested by livezey ( 1996, 1997b ) and the shelducks should be placed in the tribe tadornini of subfamily anatinae, therefore, our results do not support sibley and ahlquist ' s ( 1990 ) establishment of the subfamily cygninae and placing the shelducks in the tribe anserini
研究結果表明： 1 ）雁形目鳥類12srrna基因有較多的堿基插入和缺失，堿基轉換數高於顛換數； 2 ）贊同將鵲鵝（ anseranas ）置於鵲鵝科（ anseranatidae ）中，樹鴨（ dendrocygna ）應從雁亞科（ anserinae ）中獨立出來設立樹鴨科（ dendrocygnidae ） ，白背鴨（ thalassornis ）隸屬于樹鴨科； 3 ）鴨科（ anatidae ）可分為雁亞科和鴨亞科（ anatinae ） 2個亞科，不贊同sibley & ahlquist （ 1990 ）設立天鵝亞科（ cygninae ）及將麻鴨歸入雁族（ anserini ）的觀點，支持livezey （ 1996a ， 1997b ）的觀點建議將天鵝類歸為雁亞科天鵝族（ cygnini ） ，麻鴨置於鴨亞科下麻鴨族； 4 ）在鴨亞科內的系統發生上，潛鴨最早分歧出來，麻鴨、海中文摘要鴨及棲鴨彼此iaj的親緣關系較近；河鴨族為一單系發生群，在系統演化中形成獨立的一支。( 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。At the same time, there exists not some base deletion but only base substitution among them. there are 6 base transitions between the sequence of boacal5 ' and boccal5 ", and 2 transitions and 1 base transversions between boacal5 " and bogcal5 ", 3 transversions and 2 transitions between boccal5 " and bogcal5 ". 3. alignment of according sequences of putative amino acid of cal homologs from 8 plants reveals high conservation according to the mads domains of them
發現三者之間堿基序列差異僅僅是發生了堿基替代而不存在堿基的缺失現象，其中boacal5 』與boccal5 』之間存在6次堿基轉換，而boaca15 』和bogcal5 』之間則存在2次堿基轉換和1次堿基顛換， boccal5 』和bogcal5 』之間則有3次堿基顛換和2次堿基轉換。( 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。分享友人