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相关概念视频

Epigenetic Regulation01:37

Epigenetic Regulation

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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From DNA to Protein03:06

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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...
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The Central Dogma01:25

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Overview
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DNA as a Genetic Template02:05

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Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
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Multi-species Conserved Sequences02:51

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
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Immunostaining for DNA Modifications: Computational Analysis of Confocal Images
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一个保存的基因组代码支着动物DNA甲基化模式.

Dafni Anastasiadi1, Maren Wellenreuther2

  • 1The New Zealand Institute for Plant and Food Research Ltd, Nelson Research Centre, 293 Akersten St, Nelson 7010, New Zealand.

Trends in ecology & evolution
|August 24, 2023
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概括

非遗传遗传,如DNA甲基化,影响进化. 研究人员在许多动物物种中发现了DNA序列和甲基化模式之间的保存联系,这表明了古代的进化过程.

关键词:
通过DNA甲基化.动物动物动物动物动物动物表观遗传学是指表观遗传学.基因组基因组学生命的树 生命的树

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科学领域:

  • 进化生物学 进化生物学
  • 遗传学 是一个遗传学.
  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.

背景情况:

  • 非遗传遗传机制越来越被认为是进化的关键驱动力.
  • 然而,这些非遗传遗传过程的进化保存在很大程度上仍未得到研究.
  • 基因甲基化是参与非遗传的关键表观遗传机制.

研究的目的:

  • 为了研究整个动物王国DNA甲基化模式的进化保存.
  • 为了确定DNA序列和DNA甲基化之间的关联是否保存.
  • 了解对进化生物学更广泛的影响.

主要方法:

  • 分析了来自580种动物的大量DNA甲基化数据.
  • 比较基因组学以确定DNA序列和甲基化之间的关联.
  • 生物信息学方法来评估保护模式.

主要成果:

  • 在各种动物物种中确定了DNA序列和DNA甲基化之间的保存关联.
  • 证明某些DNA甲基化模式在进化时间尺度上保持.
  • 为表观遗传调节的深层进化根源提供了证据.

结论:

  • 这些发现表明,基于DNA甲基化的非遗传遗传是动物进化中保存的过程.
  • 保存的序列甲基化关联突出显示了在塑造进化轨迹时遗传和表观遗传因素之间的相互作用.
  • 这项研究为未来研究保存表观遗传机制的功能意义奠定了基础.