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Leah Schwiesow

Leah Schwiesow is a Scientific Curator at Addgene. She received her PhD from the University of California, Santa Cruz and studied virulence gene regulation in pathogenic bacteria.

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Plasmids 101: Plasmid Incompatibility

Posted by Leah Schwiesow on Mar 31, 2020 9:15:00 AM

Plasmid incompatibility is defined as the inability of different plasmids to be maintained in one bacterial cell. In this Plasmids 101 post, we’ll cover why this happens, how it might affect your work, and how understanding it can be used for good. 

First, why are plasmids incompatible? Plasmid incompatibility occurs when multiple plasmids within one cell have the same replicon and/or partitioning system. Let’s start with the replicon- the part of the plasmid that contains the origin of replication and the replication control machinery (Need a refresher on the Origin of Replication? See our Plasmids 101: Origin of Replication blog). 

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Topics: Plasmids 101, Plasmids

RNA Extraction Without A Kit

Posted by Leah Schwiesow on Mar 24, 2020 9:15:00 AM

As with DNA isolation, scientists commonly rely on RNA isolation kits to make their life easier. Recently, we published a blog on DNA purification without a kit that outlined several reasons why doing something without a kit has advantages: less plastic waste, less expense, and less of being left with a bunch of random solutions when all the spin columns run out. In this article, we cover the basics of isolating RNA without a kit.

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Topics: Molecular Biology Protocols and Tips, Plasmids

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