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相关概念视频

Multiple Allele Traits01:49

Multiple Allele Traits

The Concept of Multiple Allelism
Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
Genetic Variation01:25

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles, which...
Plasmids01:28

Plasmids

Plasmids are extrachromosomal DNA molecules found in bacteria, archaea, and some eukaryotic microbes like yeast. These small, circular DNA structures typically contain fewer than 30 genes, although some may exist linearly. Plasmids vary in their number within a cell, known as copy number. Single-copy plasmids are present in one copy per cell and multi-copy plasmids are present in multiple copies, reaching over 100 copies per cell.Plasmids usually replicate independently of the chromosomal DNA...
Conjugation01:19

Conjugation

Conjugation is a form of horizontal gene transfer that primarily occurs in bacteria and some archaea, promoting genetic diversity and adaptation. Bacteria can acquire resistance genes through conjugative plasmids, allowing them to survive antibiotic treatments that would otherwise be lethal. This process involves direct contact between cells through specialized structures such as the sex pilus and is mediated by conjugative plasmids, including the F (fertility) factor.Conjugation requires...
Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...

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相关实验视频

Updated: Jun 30, 2026

A Multi-detection Assay for Malaria Transmitting Mosquitoes
09:00

A Multi-detection Assay for Malaria Transmitting Mosquitoes

Published on: February 28, 2015

在Plasmodium falciparum中的膜蛋白基因中的多态过量.

Sarah K Volkman1, Daniel L Hartl, Dyann F Wirth

  • 1Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.

Science (New York, N.Y.)
|October 5, 2002
PubMed
概括

检测Plasmodium falciparum中的遗传变异现在使用DNA杂交与高密度寡核酸阵列更快. 这种方法可以有效地识别单核酸多态,即使在富含AT的基因组中.

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科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 寄生虫学的寄生虫学

背景情况:

  • 在致病性微生物中检测单核酸多态性 (SNP) 的传统方法通常是低效的,依赖于试错.
  • 疟疾寄生虫Plasmodium falciparum含有异常高的腺胺 (AT) 含量 (82%),这对遗传分析构成了挑战.

研究的目的:

  • 开发一种快速方便的方法来检测Plasmodium falciparum中的SNP.
  • 为了研究Plasmodium falciparum基因组内遗传变异的分布.

主要方法:

  • 利用DNA杂交与高密度寡核酸配列用于SNP检测.
  • 分析了针对Plasmodium falciparum基因的寡核酸探针的准效率.

主要成果:

  • 在Plasmodium falciparum中使用寡核酸阵列快速和方便地检测SNP,克服其高AT含量所带来的挑战.
  • 在编码细胞膜蛋白的基因中发现了不成比例的多态性丰富 (69%的多态性与22%的探针对比).
  • 观察到亚端粒区域的基因变异显著丰富 (76%的多态相对于22%的染色体).

结论:

  • 高密度寡核酸阵列为在AT丰富的微生物基因组 (如Plasmodium falciparum) 中快速检测SNP提供了强大的工具.
  • 在Plasmodium falciparum的遗传变异是非随机分布的,在细胞膜蛋白质基因和亚端粒区域的显著度.
  • 这些发现对理解寄生虫进化,耐药性和开发新诊断工具具有重要意义.