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Next-generation Sequencing03:00

Next-generation Sequencing

93.2K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
93.2K
Genomics02:02

Genomics

37.8K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
37.8K
Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

11.6K
In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
11.6K
Sanger Sequencing01:57

Sanger Sequencing

759.5K
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
759.5K
Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

4.3K
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.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
4.3K
Genome Annotation and Assembly03:36

Genome Annotation and Assembly

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The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
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Video Experimental Relacionado

Updated: Sep 28, 2025

Ultra-long Read Sequencing for Whole Genomic DNA Analysis
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Ultra-long Read Sequencing for Whole Genomic DNA Analysis

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Una secuencia del genoma humano de próxima generación

Deanna M Church1

  • 1Inscripta, Inc., Boulder, CO, USA.

Science (New York, N.Y.)
|March 31, 2022
PubMed
Resumen
Este resumen es generado por máquina.

Una secuencia casi completa del genoma humano proporciona una nueva referencia, allanando el camino para una investigación y comprensión genéticas más inclusivas. Este avance tiene como objetivo mejorar la representación en los estudios genómicos.

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Área de la Ciencia:

  • La genómica
  • La bioinformática
  • Genética de las poblaciones

Sus antecedentes:

  • La secuencia de referencia del genoma humano es crucial para la investigación genética.
  • Los genomas de referencia actuales carecen de diversidad, lo que podría sesgar los resultados de la investigación.
  • Existe la necesidad de una referencia del genoma humano más inclusiva y representativa.

Objetivo del estudio:

  • Para presentar una secuencia casi completa del genoma humano.
  • Establecer una base para una referencia genómica más inclusiva.
  • Facilitar una representación más amplia en los estudios genéticos humanos.

Principales métodos:

  • Se emplearon tecnologías avanzadas de secuenciación.
  • Se utilizaron canalizaciones bioinformáticas para el ensamblaje y análisis de secuencias.
  • Se utilizaron enfoques genómicos comparativos para evaluar la inclusión.

Principales resultados:

  • Se generó una secuencia de genoma casi completa y de alta calidad.
  • La nueva secuencia incorpora regiones que anteriormente faltaban en los genomas de referencia.
  • Los análisis iniciales sugieren una mejor representación de las diversas poblaciones.

Conclusiones:

  • La secuencia del genoma desarrollada representa un paso significativo hacia una referencia humana más inclusiva.
  • Este recurso tiene el potencial de reducir el sesgo en la investigación genética.
  • Se necesitan más esfuerzos para lograr plenamente una referencia genómica universalmente representativa.