点击切换搜索课件文库搜索结果(93)
文档格式:PPT 文档大小:749KB 文档页数:26
一、顺式作用元件和反式作用因子 Cis-acting element:不编码任何产物的 DNA片段,能影响与之相联系的同一条 DNA链上的基因表达 :启动子。 Trans-acting factor (转录因子TF) 由调节基因编码,调节基因是一种特殊 的结构基因,其编码产物(RNA或蛋白质) 可以扩散,控制其他基因的表达
文档格式:PPT 文档大小:102.5KB 文档页数:13
一、 一般特征 二、 DNA 聚合酶链反应 三、 细菌 DNA 的复制 1、E.coli 中的 DNA 聚合酶:3 种 2、复制起始点的特点:在 E.coli 中,只有一个复制点,oriC
文档格式:PDF 文档大小:199.92KB 文档页数:45
This book celebrates the importance of the question; it is not meant to be a collection of facts or procedures. The writing of this book was inspired by 16 years of queries from the research community.The con￾tributors and I have tried to meet two primary objectives:
文档格式:PDF 文档大小:362.13KB 文档页数:63
Air Buoyancy Akin to water keeping something afloat, samples can be “lifted” by air, artificially decreasing their apparent weight. This air buoy￾ancy can have a significant effect on smaller samples. Electrostatic Forces Electrostatic charges are almost always present in any environ￾ment, particularly in areas with very low humidity. If there are
文档格式:PPT 文档大小:168.5KB 文档页数:3
(1)桌上只许有笔,答题纸和英文课本。(2)不许 离开自己的座位。(3)不许偷看,不许讲话 (有问题 举手)(4)老师宣布停的时候,必须放下自己的笔。 (5)老师宣布收试卷时,试卷必须快速由每排的最左 边传向右边,每排最右边的同学负责把试卷交给当堂 助教
文档格式:PPT 文档大小:177.5KB 文档页数:5
(1)桌上只许有笔,答题纸和英文课本。(2)不许 离开自己的座位。(3)不许偷看,不许讲话 (有问题 举手)(4)老师宣布停的时候,必须放下自己的笔。 (5)老师宣布收试卷时,试卷必须快速由每排的最左 边传向右边,每排最右边的同学负责把试卷交给当堂 助教
文档格式:PDF 文档大小:47.47KB 文档页数:5
1. What are the gene expression stages that can be regulated? (10 points) Regulated stages in gene expression: (1) transcription initiation (the most important stage): RNAP binding of the promoter, transition from the closed complex to the open complex; promoter escape 4’ (2) stages after initiation (elongation and termination) 2’ (3) RNA processing (alternative splicing) in eukaryotes 2’ (4) translation 2’
文档格式:PPT 文档大小:823.5KB 文档页数:82
Most of the eukaryotic genes are mosaic (嵌合体), consisting of intervening sequences separating the coding sequence ◼ Exons (外显子): the coding sequences ◼ Introns (内含子) : the intervening sequences ◼ RNA splicing: the process by which introns are removed from the pre￾mRNA. ◼ Alternative splicing (可变剪接): some pre-mRNAs can be spliced in more than one way , generating alternative mRNAs. 60% of the human genes are spliced in this manner
文档格式:PPT 文档大小:1.61MB 文档页数:92
Similarity of regulation between eukaryotes and prokaryote 1.Principles are the same: • signals (信号), • activators and repressors (激活蛋白和阻 遏蛋白) • recruitment and allostery, cooperative binding (招募,异构和协同结合) 2. The gene expression steps subjected to regulation are similar, and the initiation of transcription is the most pervasively regulated step
文档格式:PPT 文档大小:3.78MB 文档页数:92
TOPIC 1 Principles of Transcriptional Regulation [watch the animation] TOPIC 2 Regulation of Transcription Initiation: Examples from Bacteria (Lac operon, alternative s factors, NtrC,MerR, Gal rep, araBAD operon) TOPIC 3 Examples of Gene Regulation after Transcription Initiation (Trp operon) TOPIC 4 The Case of Phage λ: Layers of Regulation
首页上页23456789下页末页
热门关键字
搜索一下,找到相关课件或文库资源 93 个  
©2008-现在 cucdc.com 高等教育资讯网 版权所有