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南疆部分地区绵羊捻转血矛线虫苯并咪唑抗性相关分子Ⅰ型β-微管蛋白基因的多态性分析
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作者 张颖 瓦热斯·吐尔松 +7 位作者 辛连喜 热依兰木·吐尔洪 卡力比夏提·艾木拉江 阿得力江·吾斯曼 胡敏 巴音查汗·盖力克 郭庆勇 赛福丁·阿不拉 《畜牧与兽医》 CAS 北大核心 2024年第10期49-56,共8页
为了解南疆地区绵羊捻转血矛线虫对苯并咪唑类药物的抗性相关分子β-微管蛋白基因的多态性,本研究对克州及喀什的183条捻转血矛线虫成虫进行ITS-2基因特异性PCR鉴定后,对抗药相关的Ⅰ型β-微管蛋白基因进行了扩增和测序,并对该抗药基因... 为了解南疆地区绵羊捻转血矛线虫对苯并咪唑类药物的抗性相关分子β-微管蛋白基因的多态性,本研究对克州及喀什的183条捻转血矛线虫成虫进行ITS-2基因特异性PCR鉴定后,对抗药相关的Ⅰ型β-微管蛋白基因进行了扩增和测序,并对该抗药基因的单核苷酸多态性(SNP)167、198和200位点进行了分析。结果:在2个地区种群中,198位点及200位点均发生不同程度突变,且以198位点突变为主,暂未在167位点发生突变;两地共发现了5种基因型,其中198位点纯合敏感型及200位点纯合抗药型(喀什12条占12.37%,克州2条占2.33%),198位点纯合抗药型及200位点纯合敏感型(喀什23条占23.71%,克州7条占8.14%)两地均存在,提示这2个种群都存在抗药性。本研究首次报道了南疆部分地区捻转血矛线虫种群Ⅰ型β-微管蛋白基因存在苯并咪唑类药物抗药性突变,为新疆地区捻转血矛线虫病的有效防控及抗药性研究提供理论依据。 展开更多
关键词 抗药性 苯并咪唑 捻转血矛线虫 型β微管蛋白基因 单核苷酸多态性 新疆南疆
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Phylogeny of Apaturinae Butterflies (Lepidoptera: Nymphalidae) Based on Mitochondrial Cytochrome OxidaseⅠ Gene 被引量:4
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作者 张敏 曹天文 +3 位作者 张睿 郭亚平 段毅豪 马恩波 《Journal of Genetics and Genomics》 SCIE CAS CSCD 北大核心 2007年第9期812-823,共12页
The phylogenetic relationships of genera in the subfamily Apaturinae were examined using mtDNA sequence data from 1,471 bp of cytochrome oxidase subunit Ⅰ (COI). The mitochondrial COI gene from a total of 16 specie... The phylogenetic relationships of genera in the subfamily Apaturinae were examined using mtDNA sequence data from 1,471 bp of cytochrome oxidase subunit Ⅰ (COI). The mitochondrial COI gene from a total of 16 species in 11 genera were sequenced to obtain mtDNA data, along with those of 4 species obtained from GenBank, to construct the MP and the NJ trees using Athyma jina, Penthema adelma, Polyura nepenthes, and Charaxes bernardus as outgroups. The transitions at the third codon positions of the COI data set were found saturated, but they were retained for analysis, because they contain the majority of the phylogenetic information. The impacts of equal weight assumptions for all characters in the parsimonious analysis were assessed by potential alternations in clades in response to different transition/transversion weighting schemes. The results indicated four distinct major groups in Apaturinae. Moreover, several well supported and stable clades were found in the Apaturinae. The study also identified undetermined taxon groups whose positions were weakly supported and were subject to changes under different weighting schemes. Within the Apaturinae, the clustering results are approximately identical to the classical morphological classification. The mtDNA data suggest the genus Mimathyma as a monophyletic group. Lelecella limenitoides and Dilipa fenestra have close relationship with very strong support in all phylogenetic trees. It also supports the taxonomic revision of removing several species from Apatura to other genera, namely Mimathyma schrenckii, M. chevana, M. nycteis, Chitoria subcaerulea, C. fasciola, C. pallas, and Helcyra subalba. 展开更多
关键词 NYMPHALIDAE apaturinae MTDNA molecular phylogeny cytochrome oxidase gene
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Development and Clinical Application of a Single-tube Nested PCR Method to Amplify the DNA Polymerase Ⅰ Gene of Treponema Pallidum 被引量:2
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作者 曾铁兵 吴移谋 +1 位作者 黄澍杰 吴志周 《Chinese Journal of Sexually Transmitted Infections》 2004年第2期101-104,i004,共5页
Objective: To develop a sensitive, specific and simple method for detection of extremely low numbers of T. pallidum in clinical specimens, as a significant addition to the serologic tests for syphilis diagnosis. Metho... Objective: To develop a sensitive, specific and simple method for detection of extremely low numbers of T. pallidum in clinical specimens, as a significant addition to the serologic tests for syphilis diagnosis. Methods: Double-tube nested PCR(DN-PCR) and single-tube nested PCR(SN-PCR) assays were performed to amplify specific fragments of the DNA poly-merase I gene(polA) of T. pallidum. Sensitivity and specificity of the two PCR assays were tested. Eighty-six whole blood specimens from persons with suspected syphilis were detected by the two nested PCR methods. The TPPA test was used as a comparison for detecting syphilis in sera from corresponding patients. Results: Only specific amplicons could be obtained during amplification of the T. pallidum polA gene and the detection limit was approximately 1 organism when analyzed on gel by the two PCR methods. Of 86 clinical specimens, 62 were positive by TPPA. Of these, 54 and 51 were positive by the DN-PCR and SN-PCR, respectively, which does not represent a statistically significant difference between the two PCR tests. Of 24 TPPA-negative specimens, 5 were positive by both DN-PCR assay and SN-PCR assay. Conclusion: The SN- polA PCR method is extremely sensitive, specific and easy to perform for detecting low numbers of T. pallidum in clinical blood specimens as a complementary to serology for syphilis diagnosis. 展开更多
关键词 nested polymerase chain reaction(PCR) DNA polymerase gene(polA) Treponema pallidum whole blood
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Analysis of Rb gene Xba Ⅰ polymorphism in Shaanxi aged atherosclerosis population
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作者 刘军 舒青 +2 位作者 郑强荪 杜日映 张宁仔 《Journal of Medical Colleges of PLA(China)》 CAS 2000年第3期224-226,共3页
Objective:To investigate variable number tandem repeat (VNTR) polymorphism of the 17th intron of Rb gene in Shaanxi aged population and the relationship between the polymorphism of Rb gene and atherosclerosis(AS) gene... Objective:To investigate variable number tandem repeat (VNTR) polymorphism of the 17th intron of Rb gene in Shaanxi aged population and the relationship between the polymorphism of Rb gene and atherosclerosis(AS) genetic suscepti- bility. Methods: VNTR polymorphism of the 17th intron of Rb gene were examined in 100 Shaanxi aged AS patients and 100 Shaanxi aged control individuals by PCR-Rb-Xba Ⅰ-RFLP. Results::Two alleles were found both in AS group and control group, which were separately 945 bp(S1) and 630bp + 315bp(S2). S1S2 genotype was the most frequent one in the two populations. Significant difference in allele frequency was not found between AS group and control group, and allele frequency was no significant difference between Chinese and Caucasian. Conclusion: Xba Ⅰ enzyme site of Rb gene could have been certainly stable in AS population, and it was inferred that the polymorphism locus was not liable to cause mutation, which might not implicated in the formation of AS. 展开更多
关键词 ATHEROSCLEROSIS RB gene Xba restrict FRAGMENT length POLYMORPHISM
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The gene diagnosis and mutation survey of autosomal dominant polycystic kidney disease Ⅰ
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作者 王立明 闵志廉 +4 位作者 朱有华 齐隽 缪为民 陈建鹤 焦炳华 《Journal of Medical Colleges of PLA(China)》 CAS 1999年第4期299-303,共5页
Objective: To explore gene diagnosis of autosomal dominant polycystic kidney disease (ADPKD Ⅰ ),and to look for the typical mutation in order to improve the gene diagnosis. Metbods: southern blot and PCR wasused to o... Objective: To explore gene diagnosis of autosomal dominant polycystic kidney disease (ADPKD Ⅰ ),and to look for the typical mutation in order to improve the gene diagnosis. Metbods: southern blot and PCR wasused to observe the mutation condition of 3' end single copy region of ADPKD Ⅰ gene ; Amplifying and analyzingthe microsatellite SM7 by PCR. Results: ①After the probe AH4 was hybridized with 16 patients' genomic DNAby Southern blot, the common 15 kb fragments were found in every one; ②For 27 patients, 5. 72 kb genomicDNA, which is between the probe AH4 and JH14, was amplified by PCR, and no 5. 5 kb genomic DNA deletionwas found in this region; SM7 was amplified in lO9 health persons, its PIC was 0.76, and was closely linked towith ADPKD Ⅰ gene in three patient families. Conclusion: In Han nation, ①No large genomic DNA segmentdeletion could be found frequently in ADPKD Ⅰ gene 3' end single copy region; ②The PIC of SM7 is high, it canbe used to make rapid gene diagnosis in about 70% ~80% ADPKD Ⅰ families. 展开更多
关键词 ADPKD SM7 gene DIAGNOSIS
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Establishment of a Real-time Fluorescent Quantitative RTPCR Method for Detecting NP Gene of Class Ⅰ Newcastle Disease Virus(NDV)
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作者 Junping CAO Xiaoquan WANG +2 位作者 Han CHENG Xiaowen LIU Xiufan LIU 《Agricultural Biotechnology》 CAS 2018年第6期16-19,24,共5页
Newcastle disease( ND) is one of the most serious infectious diseases that infect the poultry industry.There is only one serotype of Newcastle disease virus( NDV),but NDVs can be divided into two distinct classes( cla... Newcastle disease( ND) is one of the most serious infectious diseases that infect the poultry industry.There is only one serotype of Newcastle disease virus( NDV),but NDVs can be divided into two distinct classes( class Ⅰ,and class Ⅱ) according to their genetic relationship.To develop a method for rapid quantitative detection of class Ⅰ NDV,a pair of primers and a TaqM an probe were designed and synthesized according to the conservative sequence of NP gene of class Ⅰ NDV.The positive recombinant plasmid harboring NP gene of JS-18-05 isolate was used as a positive template to establish the standard curve.A real-time fluorescent quantitative RT-PCR method was established for rapid detection of class Ⅰ NDV with strong specificity,high sensitivity and good repeatability.The established method exhibited a good linear relationship within the concentration of 102 to 108 copies of NDV,by which 1 μl of 10 copy of NDV nucleic acid could be detected in the initial template.Compared with conventional virus isolation methods,the established method had similar sensitivity and led to the same results in detecting33 class Ⅰ,class Ⅱ NDV isolates.The study provided the basis for rapid quantitative detection of class Ⅰ NDVs and further clarification of their pathogenicity and pathogenic mechanism in poultry. 展开更多
关键词 CLASS Newcastle disease virus NUCLEOCAPSID protein gene FLUORESCENT quantitative RT-PCR
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Inhibition of α_1(Ⅰ) collagen gene in vitro transcription by antisense oligodeoxynucleotides
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作者 单越新 罗超权 +1 位作者 徐钤 利天增 《Journal of Medical Colleges of PLA(China)》 CAS 2000年第3期176-177,181,共3页
Objective and Methods: Excessive accumulation of collagen typeⅠ and type Ⅲ causes the formation of keloids and hypertrophic scars. To understand the mechanism by which antisense oligodeoxynucleotide (Oligo) acts on ... Objective and Methods: Excessive accumulation of collagen typeⅠ and type Ⅲ causes the formation of keloids and hypertrophic scars. To understand the mechanism by which antisense oligodeoxynucleotide (Oligo) acts on in vitro transcrption α1 (I) collagen gene, isotopes (α-32pGTP) was incorporated into 2 SP6 in vitro transcription systems. Results and Conclu- sion: Oligo 2 (at the transcription start region) could effectively inhibit in vitro transcription of pGEM3-Col13 and the control (random oligodeoxynucleotides) showed no inhibition. However, oligo 1 (at the transcription start region) obviously inhibited the in vitro transcription of pGEM3-Col14, while Oligo 2, which targeted at the down stream region (about 200 bp) of the promoter showed no significant inhibition effect. 展开更多
关键词 α_1() collagen gene antisense oligodeoxynucleotides in vitro transcription
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日本七鳃鳗转化生长因子βⅠ型受体基因(L-Tgfbr1)的克隆与表达分析
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作者 侯蕴轩 李文娜 +5 位作者 杨晓萱 雷丽桐 张代云 马畅蔚 王浩 《海洋科学》 CAS CSCD 北大核心 2023年第1期88-98,共11页
作为无颌类脊椎动物的现存代表之一,日本七鳃鳗(Lampetrajaponica)是研究免疫系统起源与进化的重要模型。为了探究TGF-β(Transforming growth factor beta)信号通路在日本七鳃鳗免疫调节中的功能,本研究利用PCR技术克隆了日本七鳃鳗TGF... 作为无颌类脊椎动物的现存代表之一,日本七鳃鳗(Lampetrajaponica)是研究免疫系统起源与进化的重要模型。为了探究TGF-β(Transforming growth factor beta)信号通路在日本七鳃鳗免疫调节中的功能,本研究利用PCR技术克隆了日本七鳃鳗TGF-βⅠ型受体基因(L-Tgfbr1)的编码序列,开放阅读框长度为1335 bp,编码444个氨基酸残基。L-Tgfbr1蛋白含有已知的TGF-βⅠ型受体分子的主要功能结构域,其中位于胞内的丝/苏氨酸激酶催化结构域保守性较高。系统进化树分析表明,L-Tgfbr1处于脊椎动物Tgfbr1蛋白的底端进化枝上,表明其在Tgfbr1进化史中具有原始性地位。实时定量PCR结果发现,L-Tgfbr1在心脏等组织中的转录水平较高。利用脂多糖注入七鳃鳗激活其先天性免疫应答,L-Tgfbr1在肾脏、鳃、髓小体、肝脏、白细胞、口腔腺中的转录水平呈现一过性的迅速上调。利用免疫印迹进一步验证了脂多糖免疫24 h时后L-Tgfbr1在白细胞中的蛋白表达水平显著上调。利用免疫荧光染色发现L-Tgfbr1蛋白主要分布于七鳃鳗白细胞和髓小体细胞的细胞质中。以上结果表明L-Tgfbr1及其介导的TGF-β通路可能在七鳃鳗免疫调控中发挥重要功能。 展开更多
关键词 日本七鳃鳗 转化生长因子β型受体 基因克隆 基因表达
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The Genetic Structure and Diversity of Repomucenus curvicornis Inhabiting Liaoning Coast Based on Mitochondrial COⅠ Gene and Control Region
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作者 Li Yulong Liu Xiuze +3 位作者 Yu Xuguang Li Yiping Fu Jie Dong Jing 《Animal Husbandry and Feed Science》 CAS 2018年第1期12-17,共6页
[Object] This study was conducted to explore the genetic diversity and structure of the wild Repomucenus curvicornis inhabiting Liaoning Coast, China. [Method] The mitochondrial COⅠ gene and control region(CR) were... [Object] This study was conducted to explore the genetic diversity and structure of the wild Repomucenus curvicornis inhabiting Liaoning Coast, China. [Method] The mitochondrial COⅠ gene and control region(CR) were PCR amplified from the wild R. curvicornis populations from the Liaodong Bay(n=22) and the northern Yellow Sea(n=18), sequenced and analyzed for genetic diversity. [Result] The contents of A, T, C and G of 624 bp COⅠ gene were 24.09%, 31.04%, 25.28%, and 19.59%, and those of 460 bp CR fragment were 32.96%, 32.80%, 14.86% and 19.38%, respectively. The total number of variable sites, average number of nucleotide differences( k), haplotype diversity(H) and nucleotide diversity(π) based on COⅠ gene were 38, 4.67,(0.96±0.02) and(0.007 5±0.004 2), and those based on CR fragment were 26, 3.35,(0.97 ±0.02) and(0.007 3±0.004 3), respectively. Based on mitochondrial COⅠ gene and CR, the genetic diversity of Liaodong Bay population was lower than that of the northern Yellow Sea population. The AMOVA analysis based on CR fragments revealed almost significant genetic divergence between the Liaodong Bay and the northern Yellow Sea populations, while there was no significant genetic divergence based on COⅠ gene. The results showed that CR and COⅠ gene are effective molecular markers for detecting the genetic diversity of R. curvicornis population, while CR is more reliable than COⅠ gene in detecting the genetic structure. [Conclusion] CR is an appropriate marker for genetic analysis of marine fish population. 展开更多
关键词 Repomucenus curvicornis Mitochondrial DNA CO gene Control region sequence genetic diversity genetic differentiation
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The Truncated Gene cfaD′ Positively Regulates CFA/Ⅰ Expression of Enterotoxigenic Escherichia coli
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作者 齐小保 徐建国 《Journal of Microbiology and Immunology》 2004年第4期250-254,共5页
The gene cluster cfaABCED’ of enterotoxigenic Escherichia coli, encoding the fimbriae which is called colonization factor antigen located on a plasmid. It is positively regulated by cfaR, a member of the AraC family,... The gene cluster cfaABCED’ of enterotoxigenic Escherichia coli, encoding the fimbriae which is called colonization factor antigen located on a plasmid. It is positively regulated by cfaR, a member of the AraC family, and the cfaD’ gene region, which is located downstream of cfaE and is homologous to cfaR, had been described as a truncated cryptic gene. In the present study we observed that the CFA/ fimbriae subunit, cfaB, was expressed in lower amount by the cfaABCED’ clone pNTP513 in host E. coli HB101. The expression of CFA/ diminished by deletion of cfaD’ gene region from pNTP513, and was restored by acquisition of cfaD’ in trans. Furthermore, CFA/ expression by cfaD’ deletion mutant, the cfaABCE clone, was remarkably increased by the presence of cfaD’ in trans in a topoisomerase A deficient strain of E. coli DM800. These data suggest that cfaD’ region is a functional region of gene, that regulates the CFA/ expression with cfaR by unknown mechanism. 展开更多
关键词 CFA/ Enterotoxigenic E. coli (ETEC) cfaR cfaD' gene expression
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Fok Ⅰ多态性与过敏性疾病
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作者 贾芳 孔旭辉 《中华临床免疫和变态反应杂志》 CAS 2023年第2期175-182,共8页
维生素D是一组具有生物活性的脂溶性类固醇激素衍生物,其受体依赖性免疫效应对先天性免疫及适应性免疫均有调节作用。Fok Ⅰ(rs2228570)位于维生素D受体(VDR)基因外显子2翻译起始位点的第8个碱基对,它的胸腺嘧啶/胞嘧啶(T/C)转换导致最... 维生素D是一组具有生物活性的脂溶性类固醇激素衍生物,其受体依赖性免疫效应对先天性免疫及适应性免疫均有调节作用。Fok Ⅰ(rs2228570)位于维生素D受体(VDR)基因外显子2翻译起始位点的第8个碱基对,它的胸腺嘧啶/胞嘧啶(T/C)转换导致最终合成的VDR蛋白只含有424个氨基酸。携带突变型基因的VDR基因相比野生型有着更高的转录活性,VDR基因Fok Ⅰ多态性能对靶基因的转录效率与免疫细胞的免疫效应产生影响。研究显示,Fok Ⅰ多态性与类风湿关节炎、乳腺癌、卵巢癌等多种疾病的发生、发展及预后相关,但与过敏性疾病相关的研究较少。本文对VDR基因Fok Ⅰ多态性与哮喘、特应性皮炎、过敏性鼻炎等过敏性疾病的最新研究进展进行综述。 展开更多
关键词 维生素D 维生素D受体 过敏性疾病 Fok(rs2228570) 基因多态性
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小麦AGPase胞质型基因LSUI的克隆及正义、反义与RNAi干扰载体的构建 被引量:4
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作者 康国章 张孟琴 +2 位作者 官春云 郭天财 朱云集 《浙江大学学报(农业与生命科学版)》 CAS CSCD 北大核心 2007年第6期607-615,共9页
采用RT-PCR方法从小麦品种豫教2号的发育籽粒中克隆出AGPase胞质型大亚基基因(large subunit,LSU I)的cDNA全长(1947 bp,GenBank No.DQ839506),同源性比较结果表明,与GenBank上已报道的LSU I基因同源性达99%,虽与其有2处碱基不同(与Z21... 采用RT-PCR方法从小麦品种豫教2号的发育籽粒中克隆出AGPase胞质型大亚基基因(large subunit,LSU I)的cDNA全长(1947 bp,GenBank No.DQ839506),同源性比较结果表明,与GenBank上已报道的LSU I基因同源性达99%,虽与其有2处碱基不同(与Z21969相比,分别在851 bp处的T变为C和926 bp处的G变为A),但他们的氨基酸序列相同,故不影响其功能.以pBI121质粒为基础,通过中间载体pBSK,构建了由35S启动子调控的LSU I基因的正义表达载体pBI121LSUⅠS;将该基因反向置于pBI121质粒的CaMV35S启动子之后,构建了LSU I的反义表达载体pBI121LSUⅠA.同时还克隆出LSU I基因的250 bp片段,以pFGC5941质粒为基础,构建了RNAi干扰载体pFGCLsuⅠ,这为研究该基因的功能打下了很好的基础. 展开更多
关键词 普通小麦 AGPase胞质型大亚基 表达载体
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雀形目15种鸟类CoⅠ与Cyt b基因序列的比较 被引量:18
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作者 梁刚 张卫 +3 位作者 雷富民 尹祚华 黄原 李天宪 《动物分类学报》 CSCD 北大核心 2007年第3期613-620,共8页
对雀形目Passeriformes6科15种鸟类线粒体DNA的Cyt b基因全序列(1143bp)和CoⅠ基因部分序列(1176bp)进行了比较,结果显示Cyt b和CoⅠ基因序列的变异位点分别为454个和366个,简约信息位点为337个和303个,而且CoⅠ基因比Cytb基因略微保守... 对雀形目Passeriformes6科15种鸟类线粒体DNA的Cyt b基因全序列(1143bp)和CoⅠ基因部分序列(1176bp)进行了比较,结果显示Cyt b和CoⅠ基因序列的变异位点分别为454个和366个,简约信息位点为337个和303个,而且CoⅠ基因比Cytb基因略微保守,进化速率也较低。采用邻接法、最大简约法、最大似然法和贝叶斯法分别构建了CoⅠ和Cyt b基因两组数据集的分子系统发生树及其合一树,并对建树结果进行了比较分析。基于以上两点,本文认为CoⅠ基因比Cyt b基因更适合于确定雀形目科级阶元之间的系统发生关系,而且它也能够作为雀形目物种鉴定的分子标记,但在物种鉴定方面不如Cyt b基因稳定和准确。 展开更多
关键词 雀形目 Co基因 CYT B基因 序列比较
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湖羊GHR和IGF-Ⅰ基因表达的发育性变化及其与肉质性状的关联 被引量:14
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作者 孙伟 李达 +8 位作者 马月辉 关伟军 储明星 丁家桐 李碧春 张有法 陈玲 吴文忠 周洪 《中国农业科学》 CAS CSCD 北大核心 2012年第22期4678-4687,共10页
【目的】探讨生长激素受体(growth hormone receptor,GHR)和胰岛素样生长因子-Ⅰ(insulin-likegrowth factor-Ⅰ,IGF-Ⅰ)基因在湖羊不同生长阶段背最长肌中表达丰度与肉质性能的相关性以及这两个基因表达水平的关联性,为湖羊肌肉生长性... 【目的】探讨生长激素受体(growth hormone receptor,GHR)和胰岛素样生长因子-Ⅰ(insulin-likegrowth factor-Ⅰ,IGF-Ⅰ)基因在湖羊不同生长阶段背最长肌中表达丰度与肉质性能的相关性以及这两个基因表达水平的关联性,为湖羊肌肉生长性状的选育提供遗传学资料。【方法】利用荧光定量RT-PCR分析GHR和IGF-Ⅰ基因在湖羊早期生长背最长肌肉组织中的mRNA的发育性变化。【结果】①出生后随着月龄的增加,母羊GHR基因在背最长肌的表达趋势为:先升高后降低再升高再降低最后再升高,最后6月龄到达最高点;公羊GHR在背最长肌的表达趋势为:先升高到2月龄到达一个峰值,2月龄到4月龄为一个降低的过程,4月龄到6月龄又升高,并到达最高点;母羊IGF-Ⅰ基因在背最长肌的表达趋势为:由2日龄开始依次升高最后于6月龄到达最高点;公羊IGF-Ⅰ基因在背最长肌的表达趋势为:先升高到1月龄到达一个峰值,1月龄到3月龄为一个降低的过程,并于3月龄降至与初生接近相等的水平,此后随月龄增加逐渐升高,并于6月龄到达最高点;②GHR和IGF-Ⅰ基因在湖羊各月龄间大多存在显著或极显著差异,湖羊的公羊和母羊的GHR和IGF-Ⅰ基因的相同生长阶段的表达也大多存在显著或极显著差异;③GHR和IGF-Ⅰ基因的表达存在显著正相关(0.01<P<0.05),GHRI和GF-I基因与肌纤维直径均存在极显著正相关(P<0.01),GHR与肌纤剪切力存在极显著正相关(P<0.01),IGF-Ⅰ与肌纤剪切力存在显著正相关(0.01<P<0.05),GHR和IGF-Ⅰ基因与肌纤维密度均存在极显著负相关(P<0.01)。【结论】性别和年龄对于GHR和IGF-Ⅰ基因在湖羊不同生长阶段的肌肉中的表达具有重要影响;出生后,各基因表达水平并非随之上升或者下降,各基因表达水平出现拐点的时间并不相同;GHR和IGF-Ⅰ基因在湖羊早期肌肉性状的表达为显著正相关,可以作为湖羊早期肉质性状的候选基因。 展开更多
关键词 湖羊 GHR基因 IGF-基因 基因表达 肉质性状
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人胰岛素样生长因子Ⅰ在大肠杆菌中的表达研究 被引量:16
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作者 刘宝英 赵明 +2 位作者 王会信 王芳 丁红梅 《中国生物化学与分子生物学报》 CAS CSCD 1998年第1期47-51,共5页
胰岛素样生长因子Ⅰ(IGF-Ⅰ)是一种多功能细胞增殖调控因子,它对许多疾病有较好的治疗作用.为了获得大量的IGF-Ⅰ产品,在测定了IGF-Ⅰ全长序列的基础上,构建了IGF-Ⅰ表达载体pBVIGF,经热诱导表达后,SD... 胰岛素样生长因子Ⅰ(IGF-Ⅰ)是一种多功能细胞增殖调控因子,它对许多疾病有较好的治疗作用.为了获得大量的IGF-Ⅰ产品,在测定了IGF-Ⅰ全长序列的基础上,构建了IGF-Ⅰ表达载体pBVIGF,经热诱导表达后,SDS-PAGE分析表明:含有重组表达质粒的菌株可表达出7.6kD的蛋白.研究了不同菌株对IGF-Ⅰ表达的影响.IGF-Ⅰ的表达水平可达15mg/L.重组蛋白主要以包涵体形式存在,进行了初步纯化和复性研究,Western印迹表明重组蛋白具有IGF-Ⅰ的抗原性.并初步建立了IGF-Ⅰ生物活性测定方法. 展开更多
关键词 人胰岛素样生长因子 大肠杆菌 基因表达
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PCR-RFLP技术对Ⅰ群禽腺病毒12个血清型毒株的分型鉴定 被引量:17
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作者 唐熠 谢芝勋 +5 位作者 熊文婕 刘加波 庞耀珊 邓显文 谢志勤 谢丽基 《中国兽医科学》 CAS CSCD 北大核心 2009年第10期886-889,共4页
应用扩增Ⅰ群禽腺病毒(AAV)Hexon基因A片段和B片段的2对引物,对Ⅰ群AAV的12个血清型毒株进行了PCR扩增。结果扩增出的A片段大小为1 219 bp,B片段大小为1 350 bp。对A片段用限制性内切酶HaeⅡ进行酶切,结果得到6种不同的RFLP图谱;对B片... 应用扩增Ⅰ群禽腺病毒(AAV)Hexon基因A片段和B片段的2对引物,对Ⅰ群AAV的12个血清型毒株进行了PCR扩增。结果扩增出的A片段大小为1 219 bp,B片段大小为1 350 bp。对A片段用限制性内切酶HaeⅡ进行酶切,结果得到6种不同的RFLP图谱;对B片段进行HaeⅡ酶切,结果得到9种不同的RFLP图谱。综合分析A片段和B片段的PCR-RFLP结果,能鉴别Ⅰ群AAV的12个血清型。结果表明,建立的PCR-RFLP具有快速、简单、特异、灵敏等优点,可作为Ⅰ群AAV流行毒株血清型的快速分型工具。 展开更多
关键词 群禽腺病毒 Hexon基因 聚合酶链式反应-限制性片段长度多态性
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基于cox Ⅰ基因对猪囊尾蚴河南分离株种系发育关系的研究 被引量:10
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作者 赵光辉 张改平 +4 位作者 宁长申 王选年 张龙现 菅复春 鲁琨 《畜牧兽医学报》 CAS CSCD 北大核心 2008年第1期72-78,共7页
利用RT-PCR技术从河南部分地域的猪囊尾蚴中获得10个分离株的cox Ι部分基因序列,其长度为344bp;将其克隆入pMD19-T并测序;分别用Clustal X 1.81程序对序列进行比对,然后用PAUP 4.0程序MP法和NJ法绘制种系发育树,并用PUZZLE 5.2程序构... 利用RT-PCR技术从河南部分地域的猪囊尾蚴中获得10个分离株的cox Ι部分基因序列,其长度为344bp;将其克隆入pMD19-T并测序;分别用Clustal X 1.81程序对序列进行比对,然后用PAUP 4.0程序MP法和NJ法绘制种系发育树,并用PUZZLE 5.2程序构建最大似然树;同时利用WDANSIST 2.5程序和DNAstar 5.0中的Megalign程序进行同源性分析。结果表明,10个河南猪囊尾蚴分离株的coxΙ部分基因序列完全一致,属于猪带绦虫亚洲基因型;猪囊尾蚴coxΙ部分基因可有效区分出Asian和American/African两种基因型,并可用于不同种带科绦虫的鉴别诊断。因此,猪囊尾蚴coxΙ基因有望作为一种鉴别基因用于带科绦虫病和囊尾蚴病的PCR鉴别诊断。 展开更多
关键词 猪囊尾蚴 COX 基因 种系发育关系
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我国汉族人群HLAⅠ类经典基因单倍型及连锁分析 被引量:11
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作者 袁方 孙玉英 +6 位作者 骆媛 梁飞 刘楠 金荔 刘金锋 刘曙光 奚永志 《中国实验血液学杂志》 CAS CSCD 2007年第5期1084-1089,共6页
本研究旨在探讨我国汉族人群HLAⅠ类经典基因座位HLA-A、HLA-B、HLA-Cw位点的基因频率,单倍型频率及连锁特征。采用序列特异性引物(SSP)PCR低分辨基因分型技术对1014例随机选择的无关个体的经典HLAⅠ类位点进行基因分型,并对其相关遗传... 本研究旨在探讨我国汉族人群HLAⅠ类经典基因座位HLA-A、HLA-B、HLA-Cw位点的基因频率,单倍型频率及连锁特征。采用序列特异性引物(SSP)PCR低分辨基因分型技术对1014例随机选择的无关个体的经典HLAⅠ类位点进行基因分型,并对其相关遗传学参数进行统计学分析。结果发现汉族人群中较为常见的HLA-Ⅰ类基因是A*02(0.33)、A*11(0.24)、B*15(0.14)、B*13(0.13)、Cw*03(0.25)、Cw*07(0.18);较为常见的单倍型是A*02-B*46(0.071)、A*11-B*15(0.051)、A*02-Cw*01(0.084)、A*11-Cw*03(0.079)、B*46-Cw*01(0.095)和B*13-Cw*03(0.071)等,其中A*02-B*46、A*30-B*13、A*30-Cw*06、A*02-Cw*01、B*46-Cw*01和B*58-Cw*03等单倍型呈现出显著的连锁不平衡;而A*02-B*15、A*02-B*40、A*24-Cw*03、A*02-Cw*03、A*31-Cw*03等连锁不平衡性相对较低,其中A*24-Cw*03在重组事件中较常出现。此外,A*02-B*46-Cw*01(0.075)、A*30-B*13-Cw*06(0.046)、A*11-B*13-Cw*03(0.045)、A*33-B*58-Cw*03(0.044)、A*11-B*15-Cw*08(0.027)、A*02-B*38-Cw*07(0.023)、A*11-B*40-Cw*07(0.022)等为常见扩展单倍型。结论:本研究较系统地分析了我国汉族人群的HLA遗传学分布特点,为群体进化、临床移植及疾病相关研究等提供了有价值的遗传学资料。 展开更多
关键词 HIA 类基因 遗传多态性 基因频率 单倍型频率 连锁不平衡
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中华虎头蟹线粒体16S rRNA和 COⅠ基因的序列比较及其系统进化分析 被引量:8
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作者 刘萍 段亚飞 +3 位作者 毛智超 李吉涛 高保全 李健 《水产学报》 CAS CSCD 北大核心 2013年第10期1441-1451,共11页
为研究中华虎头蟹野生群体的种质资源及遗传多样性状况,采用PCR扩增获得中华虎头蟹线粒体DNA的16S rRNA和COⅠ基因片段,分别对其进行序列比较及系统进化分析。16S rRNA和COⅠ基因片段的A+T平均含量分别为67.7%和61.4%,A+T含量显著高于G+... 为研究中华虎头蟹野生群体的种质资源及遗传多样性状况,采用PCR扩增获得中华虎头蟹线粒体DNA的16S rRNA和COⅠ基因片段,分别对其进行序列比较及系统进化分析。16S rRNA和COⅠ基因片段的A+T平均含量分别为67.7%和61.4%,A+T含量显著高于G+C含量。长度为515 bp的16S rRNA基因片段共检测出单倍型4种,多态性位点4个,均为单一变异位点;长度为653 bp的COⅠ基因片段共检测出单倍型11种,多态性位点23个,其中简约信息位点5个和单一变异位点18个。COⅠ基因片段比16S rRNA基因片段具有较大的变异,更适于中华虎头蟹种群的遗传多样性分析。基于16S rRNA和COⅠ基因片段的遗传距离与系统进化分析结果一致,表明中华虎头蟹与梭子蟹科的蟹类亲缘关系最近,方蟹科与沙蟹科的蟹类聚为一支,与传统分类结果基本一致;而脊椎动物2个基因片段的系统进化分析结果不一致。根据16S rRNA基因片段的遗传距离推测出4科7种蟹的大致分化时间发生在古新世至始新世。 展开更多
关键词 中华虎头蟹 线粒体DNA 16S RRNA基因 CO基因 序列分析
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罗氏沼虾3个群体线粒体COⅠ基因的序列差异和遗传标记研究 被引量:11
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作者 杨学明 郭亚芬 +3 位作者 陈福艳 蒋钦杨 梁万文 蒋和生 《遗传》 CAS CSCD 北大核心 2006年第5期540-544,共5页
利用PCR方法扩增获得罗氏沼虾(Macrobrachium rosenbergii)线粒体DNA的COⅠ基因,测定该基因片段序列。分析了罗氏沼虾缅甸原种F1代、江苏养殖群体和广西选育F2代3个群体共17只个体的序列核苷酸位点差异和遗传多态。结果表明,缅甸原种F1... 利用PCR方法扩增获得罗氏沼虾(Macrobrachium rosenbergii)线粒体DNA的COⅠ基因,测定该基因片段序列。分析了罗氏沼虾缅甸原种F1代、江苏养殖群体和广西选育F2代3个群体共17只个体的序列核苷酸位点差异和遗传多态。结果表明,缅甸原种F1代遗传多样性最为丰富,江苏养殖群体和广西选育群体的遗传多样性相对贫乏。在长度为498 bp的基因片段中,共检测到10个多态性核苷酸位点(占2.01%),17只个体具有5种基因型,3群体各自的平均核苷酸位点差异分别为0.88%、0.07%和0。UPGMA分子系统聚类树显示,江苏养殖群体和广西选育群体的遗传关系最近,其单倍型混杂聚成一支,而缅甸原种F1群体相对独立为另外一支。COⅠ基因可以作为区分两分支群体的遗传标记。 展开更多
关键词 罗氏沼虾 CO 基因 序列多态性 遗传标记
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