网络释义 1. 色氨酸操纵子 基因表达调控1... ... 阿拉伯糖操纵子( The ara Operon)色氨酸操纵子(The trp Operon) 反式作用因子( trans-acting factor) ... read.cucdc.com|基于8个网页 2. 色胺酸操作组 VII.色胺酸操作组(THE trp OPERON) ... 180 DNA 序列的突变(MUTATIONS OF THE DNA SEQUENCE)...
负阻遏系统,trpR是阻遏基因,其产物是非活性的阻遏蛋白,色氨酸是共阻遏物(Co-Repressor),可与非活性的阻遏蛋白结合并激活它.故当培养基中的色氨酸含量较高时,色氨酸与阻遏蛋白结合,激活阻遏蛋白,使之与操纵区结合,从而抑制基因表达;当培养基中色氨酸供应不足时阻遏蛋白失去色氨酸,从操纵区上解离,trp操纵子去阻遏...
Two nucleotide sequences coding for mature human immune interferon (IFN-纬) and differing from each other by nine N-terminal nucleotides were expressed in E. coli under the control of a trp promoter. The longer gene variant after the ATG initiatory codon contained a TGT TAC TGC sequence, ...
Present a model to explain attenuation(衰减作用) in the trp operon(色氨酸操纵子) 相关知识点: 试题来源: 解析 色氨酸的操纵区和第一个结构基因E之间存在一段前导肽序列(The leader sequence ),其中包含一个弱化子位点(an attenuator site),有色氨酸的浓度决定转录是否在该位点上终止. 前导肽基因含有4个...
这句话的意思是：请描述一下色氨酸操纵子的调节机制。而色氨酸操纵子（ trp operon ）的调节机制：阻遏型操纵子；主要参与调控一系列用于色氨酸合成代谢的酶蛋白的转录合成。英文详见：http://oregonstate.edu/dept/biochem/hhmi/hhmiclasses/bb450/winter2002/ch26/c26lara.htm ...
The leader sequence of the trp operon RNA contains four regions of complementary sequence which can form different base-paired RNA structures. These are termed sequences 1, 2, 3 and 4. The attenuator hairpin is the product of the base pairing of ___.() A. sequences 1 and 2 B. seque...
Operon is a structure in DNA and contains multiple functional genes. Prokaryotes like bacteria and archaea contain an operon structure, but eukaryotes lack it. Operon is a method of gene expression and is responsible for polypeptide synthesis. Answer and ...
Expression of the Bacillus subtilis trpEDCFBA operon has been shown to be regulated by transcription attenuation in response to the availability of L-tryptophan. Regulation is mediated by the tryptophan-activated trp RNA-binding attenuation protein, TRAP, the product of mtrB. Formation of mutually ...
Several DNA-binding proteins show the affinities for their specific DNA sites that positively depend on the length of DNA harboring the sites, i. e. antenna effect. DNA looping can cause the effect for proteins with two or more DNA binding sites, i. e. t
The synthetic genes were PCR-amplified from vectors supplied by MWG Eurofins Operon containing the appropriate sequence with primers encompassing selected recognition sites for cloning into an appropriate host vector. The plastid-encoded HO from G. theta was PCR-amplified from total genomic DNA, and ...