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Related Concept Videos

Next-generation Sequencing03:00

Next-generation Sequencing

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.
Sanger Sequencing01:57

Sanger Sequencing

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...
RNA-seq03:21

RNA-seq

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. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

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...
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
Genomics02:02

Genomics

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...

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Related Experiment Video

Updated: Jun 8, 2026

3' End Sequencing Library Preparation with A-seq2
12:01

3' End Sequencing Library Preparation with A-seq2

Published on: October 10, 2017

A window into third-generation sequencing.

Eric E Schadt1, Steve Turner, Andrew Kasarskis

  • 1Pacific Biosciences, 1380 Willow Road, Menlo Park, CA 94025, USA. eschadt@pacificbiosciences.com

Human Molecular Genetics
|September 23, 2010
PubMed
Summary
This summary is machine-generated.

New single-molecule sequencing technologies offer longer read lengths and lower costs. This third-generation sequencing advances genomics by overcoming limitations of older methods, enabling deeper biological insights.

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G2-seq: A High Throughput Sequencing-based Technique for Identifying Late Replicating Regions of the Genome
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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease

Published on: April 4, 2018

Related Experiment Videos

Last Updated: Jun 8, 2026

3' End Sequencing Library Preparation with A-seq2
12:01

3' End Sequencing Library Preparation with A-seq2

Published on: October 10, 2017

G2-seq: A High Throughput Sequencing-based Technique for Identifying Late Replicating Regions of the Genome
06:40

G2-seq: A High Throughput Sequencing-based Technique for Identifying Late Replicating Regions of the Genome

Published on: March 22, 2018

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
09:34

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease

Published on: April 4, 2018

Area of Science:

  • Genomics and Molecular Biology
  • Biotechnology and Bioinformatics

Background:

  • First- and second-generation sequencing technologies have driven significant advances in genomics.
  • Current sequencing methods have limitations in certain applications and genome biology aspects.
  • There is a need for innovative sequencing technologies to address these gaps.

Purpose of the Study:

  • To review emerging third-generation sequencing technologies.
  • To highlight the potential of single-molecule sequencing.
  • To discuss advancements in sequencing capabilities.

Main Methods:

  • Review of current literature on sequencing technologies.
  • Description of single-molecule sequencing principles.
  • Analysis of potential applications and benefits.

Main Results:

  • Third-generation sequencing offers dramatically longer read lengths.
  • These new technologies promise shorter times to result.
  • Lower overall costs are a key potential advantage.

Conclusions:

  • Single-molecule sequencing represents a significant leap forward.
  • This technology has the potential to expand the scope of genomic research.
  • Further innovation in sequencing is crucial for advancing genome biology.