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相关概念视频

From DNA to Protein03:06

From DNA to Protein

18.0K
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
18.0K
The Central Dogma01:25

The Central Dogma

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Overview
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Improving Translational Accuracy02:07

Improving Translational Accuracy

8.8K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
8.8K
Leaky Scanning02:28

Leaky Scanning

5.1K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.1K
Transfer RNA Synthesis02:36

Transfer RNA Synthesis

11.9K
One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
11.9K
Proofreading01:31

Proofreading

6.2K
Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase...
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相关实验视频

Updated: Jun 5, 2025

Use of Alu Element Containing Minigenes to Analyze Circular RNAs
13:10

Use of Alu Element Containing Minigenes to Analyze Circular RNAs

Published on: March 10, 2020

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在错误检测圆形代码中禁止的编码组合.

Elena Fimmel1, Hadi Saleh2, Lutz Strüngmann2

  • 1Institute for Mathematical Biology Faculty of Computer Sciences, Mannheim University of Applied Sciences, 68163, Mannheim, Germany. e.fimmel@hs-mannheim.de.

Theory in biosciences = Theorie in den Biowissenschaften
|December 15, 2024
PubMed
概括
此摘要是机器生成的。

这项研究介绍了用于构建自我补充的循环代码的软件,这些代码对于保存遗传阅读框架至关重要. 该工具使用数学定理来有效排除子,有助于理解这些生物代码.

关键词:
基因编码是基因的代码.圆形代码是指循环的代码.不包括鱼.codon 的使用情况翻译过程 翻译过程

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Rare Event Detection Using Error-corrected DNA and RNA Sequencing
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Rare Event Detection Using Error-corrected DNA and RNA Sequencing

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Genome-wide Surveillance of Transcription Errors in Eukaryotic Organisms
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Genome-wide Surveillance of Transcription Errors in Eukaryotic Organisms

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相关实验视频

Last Updated: Jun 5, 2025

Use of Alu Element Containing Minigenes to Analyze Circular RNAs
13:10

Use of Alu Element Containing Minigenes to Analyze Circular RNAs

Published on: March 10, 2020

7.3K
Rare Event Detection Using Error-corrected DNA and RNA Sequencing
10:36

Rare Event Detection Using Error-corrected DNA and RNA Sequencing

Published on: August 3, 2018

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Genome-wide Surveillance of Transcription Errors in Eukaryotic Organisms
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Genome-wide Surveillance of Transcription Errors in Eukaryotic Organisms

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科学领域:

  • 遗传学 是一个遗传学.
  • 生物信息学是一种生物信息学.
  • 计算生物学 计算生物学

背景情况:

  • 圆形代码是古代没有逗号的代码的遗留物,在遗传阅读框架的保存中发挥作用.
  • 普遍遗传密码的存在促使人们对二次代码进行研究,包括自我补充的代码.
  • 最大的216个自我补充代码的数学基础和构造仍然不清楚.

研究的目的:

  • 引入新的软件来构建自我补充的循环代码.
  • 提供一个系统的方法来生成这些代码,基于数学原理.
  • 阐明圆形代码的数学基础和生物学意义.

主要方法:

  • 开发用于代码构建的专用软件.
  • 应用两个数学定理用于系统的密码子排除.
  • 利用诸如自我补充性,循环性和代码生成的最大化等要求.

主要成果:

  • 成功创建软件来构建自补的循环代码.
  • 通过数学定理证明有效的编码子排除.
  • 促进最大尺寸自补代码的构建.

结论:

  • 开发的软件提供了一个有效的方法来构建自我补充的循环代码.
  • 数学定理为理解代码构造中的代码排除提供了一个框架.
  • 这项工作增强了对循环码的数学基础和生物作用的理解.