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相关概念视频

Ribosome Profiling02:24

Ribosome Profiling

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Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
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One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation01:24

One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation

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This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
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DNA Microarrays02:34

DNA Microarrays

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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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Regulation of Expression at Multiple Steps01:23

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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
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RNA-seq03:21

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
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相关实验视频

Updated: Jul 20, 2025

A Novel Bayesian Change-point Algorithm for Genome-wide Analysis of Diverse ChIPseq Data Types
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床铺:一个强大的贝叶斯式方法,以大规模的基因表达解卷与杂的参考签名.

Saba Ghaffari1, Kelly J Bouchonville2, Ehsan Saleh1

  • 1Department of Computer Science, University of Illinois at Urbana-Champaign, Thomas M. Siebel Center, 201 N. Goodwin Ave., Urbana, IL, USA.

Genome biology
|August 3, 2023
PubMed
概括

贝叶斯解卷方法BEDwARS可以准确地从转录学数据中估计细胞类型比例和签名,即使是有噪音的引用. 它有助于理解基因表达变化和疾病病因.

关键词:
贝叶斯的推理 贝叶斯的推理大量基因表达解密解卷.二皮里丁脱原酶缺乏症一个单细胞RNA-seqq.

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科学领域:

  • 计算生物学是一种计算生物学.
  • 基因组学就是基因组学.
  • 生物信息学是一种生物信息学.

背景情况:

  • 大量转录组学数据可以反映基因表达的变化,这是由于细胞类型内的转录丰度变化或细胞类型比例的变化造成的.
  • 区分这两个场景对于准确的生物学解释至关重要.
  • 现有的表达式解卷方法面临着杂的参考签名的挑战.

研究的目的:

  • 介绍BEDwARS,一个新的贝叶斯解卷法.
  • 为了提高从批量转录组学数据中估计细胞类型比例和签名的准确性.
  • 为了提高对杂的参考签名的稳定性.

主要方法:

  • BEDwARS使用贝叶斯框架来建模和解基因表达数据.
  • 该方法专门设计用于处理参考单元类型签名和真实底层签名之间的差异.
  • 性能与使用模拟和现实数据集的领先解卷方法进行了评估.

主要成果:

  • 与现有方法相比,BEDwARS在处理杂的参考符号时表现出卓越的稳定性.
  • 该方法在估计细胞类型比例和细胞类型特定表达特征方面实现了更高的准确性.
  • 对二皮里丁脱酶缺乏症的应用揭示了与纤毛病和翻译控制受损的潜在联系.

结论:

  • BEDWARS 是一个强大而坚固的工具,用于在批量转录学中准确的细胞类型解.
  • 该方法有助于更精确地了解细胞对观察到的基因表达模式的贡献.
  • 床铺提供了关于二二二氨酸脱酶缺乏的分子基础的新见解.