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Related Concept Videos

Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
Ribosome Profiling02:24

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
DNA Isolation01:24

DNA Isolation

DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
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...
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...
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...

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Related Experiment Video

Updated: Jun 3, 2026

Screening Foodstuffs for Class 1 Integrons and Gene Cassettes
09:37

Screening Foodstuffs for Class 1 Integrons and Gene Cassettes

Published on: June 19, 2015

Genomic DNA digestion and ribotyping.

J Z Jordens1

  • 1Oxford Public Health Laboratory, John Radcliffe Hospital, Oxford, UK.

Methods in Molecular Medicine
|March 11, 2011
PubMed
Summary
This summary is machine-generated.

Bacterial characterization uses DNA fragment patterns for accurate identification and strain typing. This helps in understanding infection sources and managing patient treatment effectively.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Epidemiology

Background:

  • Bacterial characterization is crucial for taxonomy, identifying pathogenic potential, and predicting antibiotic susceptibility.
  • Intraspecies characterization is vital for epidemiological studies to trace infection sources and routes.

Purpose of the Study:

  • To detail methods for bacterial strain characterization using DNA fragment profiling.
  • To highlight the application of these methods in epidemiological investigations and clinical management.

Main Methods:

  • Genomic DNA digestion with restriction endonucleases.
  • Analysis of DNA fragment patterns (profiles) generated by restriction digestion.
  • Hybridization techniques to enhance discriminatory power of DNA profiles.

Main Results:

  • Restriction endonuclease digestion of genomic DNA produces highly discriminatory DNA fragment patterns.
  • These DNA profiles enable precise bacterial strain characterization (typing) for epidemiological studies.
  • Methods are applicable for both intraspecies typing and identification at higher taxonomic levels.

Conclusions:

  • DNA fragment profiling is a powerful tool for bacterial strain characterization and epidemiological surveillance.
  • Accurate strain typing aids in controlling infection outbreaks and guiding clinical decisions.
  • The described methods offer robust bacterial identification and typing capabilities.