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Harnessing Bacterial Toxins for Allelic Exchange

Posted by Guest Blogger on Aug 15, 2019 8:30:02 AM

This post was contributed by Jacob Lazarus, a postdoctoral researcher at Harvard.

There’s an astounding number of ways to create chromosomal mutations in bacteria, so many that it may be difficult to decide which path to take. A quick and easy way to introduce a mutation in the chromosome is to disrupt expression of a gene with an antibiotic resistance cassette. This leaves a “scar” in the chromosome, sometimes interfering with expression of surrounding genes. However, there are ways to create scarless mutations, ones that don’t leave any undesired scars in the chromosome.

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Topics: Genome Editing, Plasmids

Hot Plasmids - June 2019 - Optogenetics, Acoustic Reporter Genes, microRNAs, and the CRISPR-Cas9 system CHIME

Posted by Various Addgenies on Jun 6, 2019 8:41:37 AM

Every few months we highlight a subset of the new plasmids in the repository through our hot plasmids articles. These articles provide brief summaries of recent plasmid deposits and we hope they'll make it easier for you to find and use the plasmids you need. If you'd ever like to write about a recent plasmid deposit please sign up here

 

 

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Topics: Other Plasmid Tools, Plasmids

Hot Plasmids December 2018 - C. elegans RNAi, TurboID, Detecting Viral Outbreaks, and Protein Binding Specificity Tools

Posted by Various Addgenies on Dec 6, 2018 8:34:06 AM

Every few months we highlight a subset of the new plasmids in the repository through our hot plasmids articles. These articles provide brief summaries of recent plasmid deposits and we hope they'll make it easier for you to find and use the plasmids you need. If you'd ever like to write about a recent plasmid deposit please sign up here

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Topics: Other Plasmid Tools, Plasmids

Plasmids 101: Biotinylation

Posted by Alyssa Cecchetelli on Nov 15, 2018 8:50:12 AM

Biotin and its binding partner avidin are commonly used today in molecular biology for an array of different techniques and protocols. In this post we will discuss the natural role of biotin, biotinylation, the discovery of the biotin-avidin interaction and the uses of biotinylation in molecular biology!

Learn about in vivo biotinylation of bacterial fusion proteins

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Topics: Plasmids 101, Plasmids

Bacterial Toxin-antitoxin Systems as Molecular Biology Tools

Posted by Jennifer Tsang on Nov 1, 2018 8:35:58 AM

Members of the bacterial world produce an assortment toxins to claim territory or kill competing microorganisms, but did you know bacteria also produce substances toxic to themselves?

What are toxin-antitoxin systems?

These toxic substances are part of toxin-antitoxin systems that are widely present in bacteria. They consist of a toxin which can affect a variety of cellular processes and an antitoxin that suppresses the toxin’s activity. The key to these systems is that the toxin is stable while the antitoxin is unstable, meaning that the cells must continually produce antitoxin to avoid cell death.

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Topics: Plasmid Elements, Plasmids

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