The Addgene Blog

Master plasmid fundamentals, CRISPR techniques, AAV serotype selection, and antibody applications. Written by scientists, for scientists.

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Fluorescence microscopy of mGold2s and mGold2t, showing bright signal in cells and much longer photostability than mVenus. Images from Lee & Lai et al. (2025) under CC BY-NC-ND license.
Addgene header graphic announcing Transfection-Ready DNA, tagline 'Skip the stab. Start with the DNA.
Cartoon of four cells, with a different plasmid in each. A zoom panel shows the interior of the cells, where Cas9 uses a library sgRNA to cut a matching genomic target. Each plasmid has a different genomic target. An arrow labeled “screen for different outcomes” points to the four cells with the target genes knocked out, indicated with an X. Three cells are gray while one remains the same color, representing a different phenotype after knockout.
Diagram comparing six CRISPR-Cas genome editing tools—Cas9 and Cas12a nucleases, base editors, prime editors, transcriptional modulators, and RNA editors—showing how each protein-RNA complex binds DNA or RNA and the type of edit it produces.

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