Results show that long - range correlation structure prevails through the entire molecule of dna , and the strict self - similarity is set up to describe dna sequences only on the segment of low frequency 结果表明， dna在全序列尺度上表现出渐进自相似结构，只有在低频部分才可以用严格自相似信号来描述。
It is found that sequences of rdna from three chaetoceros strains show high level of the total sequence similarities ( all above 99 % ) , and show close relationships 结果发现三株角毛藻的rdna序列相似性非常高(全序列的相似性均大于99 ) ，进化距离也非常接近；而两株裸甲藻(一株裸甲藻未鉴定种( gymnodiniumsp
Its at content is 51 . 61 % . the whole gene consists of five exons and four introns . the mean at values for all the exons and all the introns are 49 . 35 % and 62 . 23 % respectively 野桑蚕-淀粉酶基因全序列的at为51 . 61 ，包含5个外显子和4个内含子，外显子的at平均值为49 . 35 ，内含子的at平均值为63 . 23 。
In this thesis , the fractals of dna sequences , including the self - similarity structure , are researched with two aspects of full - scale and details , in order to show the fractals of dna sequences more globally and more exactly 本文从全局和细节两个角度对dna全序列的分形特征和自相似特性进行了研究，以求更全面更准确地反映dna序列的分形现象。
A pair of primer designed according to multi - sequence comparing results of published ibv sequences in genbank was used to amplify the nucleocapsid gene of 5 strains , the amplified rt - pcr product of all 5 strains is 1 . 2kb in length 对3个克隆质粒中的目的基因片段进行序列测定，结果表明该片段含有ibvn基因全序列，其结构基因全长1227bp ，编码409个氨基酸。
Flavonoid - 3 ' , 5 ' - hydroxylase ( f3 ' , 5 ' h ) corresponding to the genetic loci hfl and hf2 , a member of the cytochrome p450 family , is the key enzyme in the anthocyanin biosynthesis , which is generally required for blue or purple flowers 本研究以紫蓝色矮牵牛基因组dna为模板，利用pcr技术获得了两个扩增产物，分别将其克隆至pgem - teasyvector上，进行了全序列分析。
It is used as the bait to screen azospirillum brasilense sp7 genomic plasmid library which was constructed by fusing 0 . 5 - 3kb fragments of a . brasilense sp7 genomic dna to the dna - activation domain in the pgad plasmid vectors Brasilensesp7的nifa全序列构建在pgbd - c2载体上，得到重组质粒pgbd - nifa ，以其为诱饵，筛选sp7质粒基因组文库(构建在pgad系列质粒上) 。
Repeat this way until sequences in obtained new subfamilies are enough short to be aligned easily . after aligning these new families optimally , the original family is also aligned by concatenating these resulting alignments 重复这个处理过程直至得到充分短的序列集而能轻易的被对齐；接着，最优化对齐这些短序列子集；最后，通过连接对齐矩阵，得到全序列的对齐。
3 . the sequence variation of mitochondria ! cytochrome b gene and phylogenetic relationships of anseriformes were studied based on the complete cytochrome b gene sequences of 19 species combined with 4 species got from genbank 3 、研究测定雁形目鸟类19f mtdna细胞色素b基因全序列，结合genbank中的4个物种，分析了雁形目鸟类细胞色素b基因的序列变异及其分子系统发生。
Its genomic dna was partially digested by sauial . dna fragments from 4 to 16 kb were collected after electrophoresis and ligated with bamhi - digested puc18 to construct genomic library . the total number of recombinant plasmids is about 9000 进一步在opua基因的上下游序列分别设计引物，从h . trueperi基因组dna中扩增出所预期大小的片段，测序验证已获得opua基因的全序列。
