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DNA Isolation

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...

DNA Isolation

DNA Isolation

DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.

DNA Agarose Gel Electrophoresis

DNA Agarose Gel Electrophoresis

Agarose gel electrophoresis is a laboratory technique commonly used to separate DNA fragments by size. However, it can also be used to isolate and purify DNA fragments using a gel extraction protocol.
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...

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Extraction of DNA from Forensic Biological Samples for Genotyping.

J E Stray¹, J Y Liu¹, M G Brevnov¹

¹Life Technologies Corporation, Foster City, CA, USA.

Forensic Science Review

|August 6, 2015

Summary

Forensic DNA extraction is challenging due to sample variability and contaminants. Recent advancements offer robust methods for reliable DNA recovery from diverse biological samples, meeting increased testing demands.

Keywords:

DNA extraction DNA isolation DNA purification DNA typing STR profiling genotyping human identification

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DNA Extraction from Paraffin Embedded Material for Genetic and Epigenetic Analyses

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Published on: March 26, 2011

Area of Science:

Forensic Science
Molecular Biology
Genetics

Background:

Biological forensic samples contain DNA crucial for evidence analysis.
Sample composition, integrity, and contaminants significantly impact DNA extraction success.
High demand for DNA testing necessitates efficient methods for compromised or low-quantity samples.

Purpose of the Study:

To review current DNA isolation methods for forensic biological samples.
To highlight best practices for DNA recovery from diverse and challenging samples.
To address the need for robust and high-throughput DNA extraction techniques.

Main Methods:

Review of established and emerging DNA isolation chemistries and protocols.
Evaluation of manual, semi-automated, and fully automated platforms.
Focus on methods ensuring high yield and purity, free from PCR inhibitors.

Main Results:

Development of robust methods for reliable DNA recovery from various forensic samples.
Advancements in high-throughput automated workflows to manage increasing sample volumes.
Successful isolation of DNA from compromised or low-level biological materials.

Conclusions:

Modern DNA isolation techniques enhance reliability and efficiency in forensic analysis.
Automated platforms are crucial for meeting the high throughput demands of forensic DNA testing.
Best practices in DNA isolation are essential for successful genotypic analysis of forensic evidence.