Mary Gearing is a former Scientist at Addgene. She got her start as a Science Communications Intern writing for the Addgene blog and website. As a full-time Addgenie, she still enjoys blogging about CRISPR and other cool plasmids!
Originally published Mar 3, 2016 and last updated Apr 13, 2021 by Will Arnold. Although CRISPR systems were first discovered in bacteria, most CRISPR-based genome engineering has taken place in other organisms. In many bacteria, unlike other organisms, CRISPR-induced double ...
Originally published Jul 14, 2015 and last updated Sep 16, 2020 by Beth Kenkel. CRISPR genome editing has quickly become a popular system for in vitro and germline genome editing, but in vivo gene editing approaches have been limited by problems with Cas9 delivery. ...
Originally published Jan 28, 2016 and last updated Sep 10, 2020 by Jennifer Tsang. CRISPR makes it easy to target multiple loci - a concept called multiplexing. Since CRISPR is such a robust system, editing or labeling efficiency doesn’t usually change when you add multiple ...
Originally published Aug 16, 2016 and last updated Aug 6, 2020 by Jennifer Tsang. When we talk about CRISPR applications, one negative often comes up: the low editing efficiency of homology-directed repair (HDR). Compared to non-homologous end joining, HDR occurs at a relatively ...
Originally published Nov 30, 2017 and updated Jul 31, 2020. Cas13 enzymes are quickly becoming major players in the CRISPR field. Just a year after Feng Zhang’s lab identified Cas13a (C2c2) (Abudayyeh et al., 2016) as a RNA-targeting CRISPR enzyme, they adapted Cas13b for ...
Originally published Feb 14, 2017 and updated Jun 24, 2020. Epigenetic modifications are an additional layer of control over gene expression that go beyond genomic sequence. Dysregulation of the epigenome (the sum of epigenetic modifications across the genome) has been ...
Promoters control the binding of RNA polymerase and transcription factors. Since the promoter region drives transcription of a target gene, it therefore determines the timing of gene expression and largely defines the amount of recombinant protein that will be produced. Many ...
RNA-editing Cas13 enzymes have taken the CRISPR world by storm. Like RNA interference, these enzymes can knock down RNA without altering the genome, but Cas13s have higher on-target specificity. New work from Konermann et al. and Yan et al. describes new Cas13d enzymes that ...
