相关实验视频
Updated: May 2, 2026

13:06
In Ovo Electroporations of HH Stage 10 Chicken Embryos
Published on: November 1, 2007
18.3K
在灵长类动物进化过程中,内蛋白基因的重塑
1Department of Cellular and Molecular Physiology, Harvard Medical School, Boston, Massachusetts 02115.
Cell
|August 12, 1988
概括
人类和的内蛋白基因显示出不寻常的灵长类动物进化. 特定物种的重复细分从共同的祖先序列演变得不同,表明不同的进化途径.
科学领域:
- 进化生物学是进化的生物学.
- 分子遗传学 分子遗传学
- 灵长类动物基因组学
背景情况:
- 卷曲素是表皮末端分化的关键蛋白质.
- 灵长类内素基因进化尚未得到充分理解.
- 比较基因组学可以揭示进化机制.
研究的目的:
- 为了研究灵长类内蛋白基因的进化分歧.
- 为了比较鼠和人类内蛋白基因的核酸序列.
- 了解特定物种重复结构的形成.
主要方法:
- 对鼠和人类内素基因的核酸序列比较分析.
- 祖先和特定物种的编码段的识别和比较.
- 对基因内重复结构的分析.
主要成果:
- 卷膜基因在灵长类动物中显示出不寻常的进化模式.
- 和人类的基因都共享一个祖先的编码段.
- 和人类的基因具有来自祖先序列的独特的特定物种重复细分.
- 的重复起源于与人类重复的不同祖先位置.
结论:
- 灵长类动物内蛋白基因是通过开发特定物种的重复细分而演变的.
- 这些独特的重复结构表明了卷膜分子的替代进化策略.
- 人类的重复部分很可能是在高级灵长类从类灵长类分离后进化出来的.
相关概念视频
The Central Dogma
116.7K
Overview
116.7K
From DNA to Protein
20.7K
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...
20.7K
Position-effect Variegation
5.6K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
5.6K
Gene Duplication and Divergence
6.8K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.8K
The Central Dogma
21.2K
The central dogma explains the flow of genetic information from DNA nucleotides to the amino acid sequence of proteins.
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
21.2K
Cellular Differentiation
5.7K
How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...
A zygote is a...
5.7K

