We narrowed to 798 results for: REP

...plays an integral role in regulating genome replication, repairing mismatched basepairs or small indels that...occur during DNA synthesis, and protomoting or repressing protein expression. Methylases involved with ... (as these would also be deficient in mis-match repair functions of Dam), so these strains should not ...Learn to Troubleshoot Your Sequencing Results Use REPLACR Mutagenesis to Mutate Your Plasmids Resources ...

...knockout screening). As the Zhang lab's Nature paper reports, “Here we have shown that the SAM system is robust...investigation of the cellular consequences of repressing or inducing individual transcripts. The activator...site in 15,977 human genes. The transcriptional repressor (CRISPRi) library contains 10 sgRNAs for each ...be turned on and off, to reversibly activate or repress genes of interest. They also “showed that different... Genome-Scale CRISPR-Mediated Control of Gene Repression and Activation. Gilbert LA, Horlbeck MA, Adamson...

...catalytically dead Cas9 fused to a transcriptional repressor to your gene of interest. It will inhibit transcription...more on this below) will both achieve temporary repression of protein expression. Addgene has a dCas9 KRAB...CRISPRa blog! Fig. 1 CRISPR activator and repressor mechanisms Want to transiently induce expression...suited for the job. Whether you want to express or repress, good luck on your protein expression journey! ...Plasmid 101: Inducible Promoters Plasmid 101: Repressible Promoters CRISPR 101: Which Cas9 Do I Choose...

...proteins known as ankyrin repeat proteins. DARPins typically consist of 3-4 repeats, have high specificity...instead of generated in vivo, they have higher reproducibility and consistency in the final product. Because...refold correctly after denaturing.  Designed ankyrin repeat proteins, or DARPins, are genetically engineered...combinatorial libraries, and high specificity has been reported for a number of targets. Due to their size and...

...Primary antibodies are represented in blue; secondary antibodies are represented in purple; signaling molecules... molecules are represented in light green; and proteins are represented in orange. Created with BioRender.com...architecture of the indirect approach is as follows: Prepare the sample. Incubate the sample with the primary...

...that meant rereading many of the original papers reporting various prime editing tools. These papers are ...quick refresher: prime editing is a “search and replace” genome editing technique that relies on a fusion...or longer) tracts of edited bases. DNA mismatch repair (MMR) is less efficient at identifying these “bubbles... use the edited strand as a template during DNA repair. Test multiple nick sites, starting with sites ..., Raguram, A., & Liu, D. R. (2019). Search-and-replace genome editing without double-strand breaks or ...

...us! A plasmid is a small piece of DNA that can replicate independently from its host’s chromosome. Although... inherited by daughter cells during cellular reproduction, similar to the host’s chromosome, or they can...For example, helper plasmids were developed to replace helper viruses in AAV production systems. We’re...the many plasmid tools available in the Addgene repository. To learn more about some other common plasmid...plasmid features, such as origins of replication and promoters, check out our other Plasmids 101 posts, and...

...modification with Homology Directed Repair (HDR), CRISPR activation or repression, transgenic mouse line creation... which means they are non-infectious and non-replicative. Nanoblades are produced by transfecting the ...compared to DNA transfection.  Homology directed repair (HDR) with Nanoblades CRISPR-based HDR allows for...transduction efficiency by neutralizing the charge repulsion between virions and the cell surface, and also...

...including a handful of plasmids that have been in the repository for many years, has now grown into a collection...neutralization assays, part of a study that examined the repertoire of antibodies from 19 COVID-19 convalescent individuals...tools based on Cas12a and Cas13  which could be repurposed for SARS-CoV-2 RNA detection. Early in the pandemic...above, some of these plasmids have been in the repository for many years while many were developed during...Harrison SC, Wesemann DR (2021) Memory B cell repertoire for recognition of evolving SARS-CoV-2 spike ...

...Associate Professor at Boston College. National reports stress the importance of providing authentic research...overexpression vector. This plasmid contains origins of replication and selectable markers that allow students to...functional MET genes to grow.) Students then use replica plating to determine if expression of MET/Met genes...complementation should only occur when galactose replaces glucose as the carbon source. Student results .... cerevisiae met deficiencies (manuscript in preparation), indicating that Met protein functions have ...

... on the composition of the viral vector and the repeat sequences present in the LTR, the vector may undergo...undergo genomic rearrangements during replication. To avoid genomic rearrangements, try amplifying the... and the type of virus, there have been varied reports of titer losses from 5% to 50% per freeze thaw ...exchanging the medium after transfecting cells, replace the medium with half the volume typically used ...virus particle to a target cell by reducing the repulsive electrostatic forces between these two negatively-charged...

...are difficult to modify through homology-directed repair. Both Cpf1 and its guide RNAs are smaller than ...in mammalian cells, LbCpf1 and AsCpf1. In both reports, on target editing efficiency for the Cpf1 orthologs...mismatches, but variably so, with Kleinstiver et al. reporting that Cpf1 can tolerate mismatches at gRNA positions... may improve the frequency of homology-directed repair (HDR) over non-homologous endjoining (NHEJ). Cas9...chance” mechanism. To prevent new editing post-HDR, repair templates should remove the PAM sequence. Many ...

...eliciting questions like “what does this model representt?" ... "how does this protein function in the ... nuclease active site wasn’t even close to its reported cleavage site on the complementary DNA strand....useful. While a physical model of a protein might represent one aspect of the protein very well, it will almost...is also wrong in at least one serious way. We represented the Cas9 protein in a surface format made of ...model also displays the several Lys/Ala mutations reported by Ian Slaymaker and colleagues to reduce off-...

... Institute) has consistently been one of the repository’s most frequently requested plasmids. I wondered... and you decide to share them using Addgene’s repository, you can also share your associated protocols...the software aims to be a life science protocol repository. The software can be used with the ZappyLabs ...Protocol Exchange (NPE) is an open online protocol repository hosted by the Nature Publishing Group. Like the...protocols when they deposit their plasmids to the repository. These protocols show up on the related plasmid...

...changed when we changed from searching for viral preps instead of plasmids? The available filtering options...to only show plasmids with ready-to-use viral preparations available Services: If there are viruses available...filter will allow to refine by serotype or lentiviral prep Requests: Only see plasmids with more than the indicated...distributed to industry research scientists Viral prep filter categories Promoters: Select the best promoter...type Serotype: Choose the AAV capsid or lentiviral prep needed Tags: Identify a specific marker protein ...

...in B-D represent the spectra for the specified contaminant, while the grey lines in B-D represent the pure...contamination. However, this ratio can be misleading. Some reports suggest that the A260/280 ratio does not drop significantly...Schlumpberger M. Effects of low A260/A230 ratios in RNA preparations on downstream applications. Qiagen Gene Expression...Additional resources on the Addgene blog Plasmid Preps: Different Purity, Different Quantities, Different...

...CcdA (antitoxin) where CcdB inferes with DNA replication by binding the GyrA subunit of DNA gyrase and...Successful cloning occurs when the ccdB gene is replaced by the gene of interest. As a result, cells that...This MazF-ZeoR cassette is flanked by two direct repeats which can be used for marker removal so that the...second recombination event between the two flanking repeats. In cells where recombination has not occured, ...concept, they tested a lux-mediated bioluminescence reporter in vivo in the absence of selective pressure and...

...synthetic peptide FLAG, the synthetic streptavidin-binding strep-tag and, more recently, OLLAS (Escherichia...STORM imaging, and electron microscopy. Sample preparation for these techniques sometimes makes it more ...retain their ability to be detected after sample preparation better than standard proteins tags like GFP. ...Addgene Browse all AAV vectors Find ready-to-use AAV preps ...

...this is represented by factorials. In environmental science and ecology, this can be represented by the... member of a class of proteins was mutated, as reported in various studies. We made a table that listed...for each protein we listed all the studies that reported mutations in that protein (including how frequently...areas are worth exploring.  Edit and rewrite, then repeat If you’re like me, your rough draft is really rough...

...personality types, and to devise strategies to be prepared for addressing unexpected situations. At the end...long-term? A few years as a healthcare consultant can prepare you for a successful career in several different...foot in the door When I was first considering preparing for and transitioning to a career in healthcare...learning about the nature of the job and the ways to prepare for it. Besides those conversations, reading online...Michael Koeris' Journey from Grad Student to Entrepeneur Get Tips on Resume Writing Resources on Addgene.org...