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Showing: 681 - 700 of 1071 results
  1. CRISPR 101: Cas9 Nickase Design and Homology Directed Repair

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    Blog Post
    ...double-strand break, and when used with two adjacent gRNAs, can lower the probability of off-target editing. In this...both strands bluntly with WT Cas9 and one gRNA, you can create a staggered cut using a Cas9 nickase and two...target different strands to create a DSB, but this can be accomplished with either a PAM-in or PAM-out orientation...20% repair efficiency. Clearly, a nickase strategy can expand the targetable region, which is especially...site. So if you can’t find a good gRNA that cuts close to your insertion site, you can’t obtain high HDR...
  2. CUT&RUN: An Improved Method for Studying Protein-DNA Interactions

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    Blog Post
    ...had success with significantly fewer wings, such that enough tissue for an experiment can be easily collected...obtaining enough material for a ChIP-seq experiment can be a major technical hurdle.   ChIP-seq requires  ...short incubation at 37 °C. These short DNA fragments can then be purified for subsequent library preparation...science.     Additional Resources Learn how you can use FRET to study protein interactions Learn about...Washington. CUT&RUN doesn’t require fixation and significantly decreases background noise, reducing the read...improvements to the initial CUT&RUN protocol, the most significant being the usage of a strong detergent to permeabilize...extraction. They report that this change offers a significant improvement and simplification of the original...
  3. Addgene's Top 10 Blog Posts of 2015

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    Blog Post
    ...year. While we love academic research, we hope we can help all researchers achieve happiness in their careers...editing.   2. Plasmids 101: Cre-lox Cre recombinase can be used to generate inversions, deletions, and translocations...gives a quick rundown of some of the strains you can use to express your protein of interest. 4. Plasmids...Non-homologous End Joining So you know that CRISPR can be used to generate knockouts, but how does it work...
  4. Performing In Vivo CRISPR Screens Using the FITS Approach

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    Blog Post
    ...screens in naïve T cells. More broadly, this system can be used to perform in vivo screens in other cell ...introduction of unique molecular identifiers, which can improve the statistical power of in vivo screens....responses in tumors, demonstrating that this system can also reveal novel pathways. The FITS deposit also...regulators of immunity. However, in vitro screens cannot faithfully model the complex spatial, cellular,...putatively involved in CD8+ T cell responses to cancer. The screen recovered known regulators, such as...interested in improving CD8+ T cell responses to cancer.   References and resources Milling, L. E., Markson...Immune Cells Genome-Wide Screening Using CRISPR Cancer and the Immune System: Deciphering the Relationship...
  5. Celebrating One Million Plasmids Shared!

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    Blog Post
    ...Can you imagine how much space a million plasmids would fill? Two weeks ago, Addgene edged passed our...we will be moving into a bigger space so that we can make an even bigger impact - we are always on the...facilitate and accelerate scientific discovery. How can Addgene help accelerate your research? Let us know...
  6. Providing Plasmids to Researchers in Developing Countries: Addgene and Seeding Labs Team Up

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    Blog Post
    ...’s progress in international distribution As you can see from the chart below, we are making great progress...Instrumental Access equipment from Seeding Labs and that can demonstrate that these plasmids will effectively ...like it. Additional Resources Find out how you can get involved with Seeding Labs Follow Seeding Labs...challenges. However, these same researchers face significant barriers to scientific discovery and career development...
  7. Reaching out to China: Canton Nucleic Acids Forum (CNAF) 2015

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    Blog Post
    ...fascinating to me was the outdoor market where one can shop for components of traditional Chinese medicine...replication. He too mentioned how “surprising” small RNAs can be and posited that “we underestimate living things...They have created a circRNA website so scientists can view public circRNA datasets and download the custom...to discover circRNAs in RNA-seq data. As far as I can tell, we don’t really know what circRNAs do yet or... able to participate when the organizers of the Canton Nucleic Acids Forum (CNAF) 2015 conference invited... of plasmid requests from Addgene. Addgene - Canton Nucleic Acids Forum 2015 from Joanne Kamens, PhD...
  8. Viral Vectors 101 eBook 2nd Edition

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    Blog Post
    ...resource for bench scientists everywhere. In it, you can find an introduction to viral vectors and their elements...content in a clean and easy-to-navigate design. You can find it, along with other eBooks in our collection...
  9. Typing CRISPR Systems

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    Blog Post
    ...Understanding the different types of CRISPR systems can be as confusing as reading Shakespeare for the first...CRISPR systems are less popular in the lab. This can be attributed to the multi-Cas effector, Cascade....power of Class 1 systems. Class 1 CRISPR systems can be further broken down into type I, type III, and...CRISPR systems. Type III systems are unique, as they can technically target both RNA and DNA, though it is...that they are involved in plasmid competition or can hijack machinery from other CRISPR systems to carry...people are familiar with. Class 2 CRISPR systems can be further broken down into type II, type V, and ...alternatives to Cas9. Cas12 is unique because it can process multiple gRNAs under a single promoter, allowing...
  10. Live and Let Dye: Self-Labeling Protein Tags

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    Blog Post
    ...these multi-component systems can be complicated to implement, they can be highly specific with a small...comfortable with it or can find a colleague to help you, synthesizing your own ligands can open up more possibilities...more). So, labeling a HaloTag or SNAP-tag construct can help you better detect dim structures or low levels...the same imaging workflows you already use. Or you can really capitalize on the dye’s performance and use...’re working with purified proteins in vitro, you can even use the same tag for multiple proteins but label...limited to fluorescent ligands! Self-labeling tags can also be used for surface immobilization, purification...
  11. Antibodies 101: The Basics of Western Blotting

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    Blog Post
    ...transfected it into your target cells, now what? How can you tell if the protein you are so keen to study ...detect the presence or absence of a protein, but can also determine if proteins are being up- or downregulated...standards, detect the cellular location of proteins, and can be a readout for protein interaction studies such...standard of known molecular weight in a separate lane can help confirm the size of the protein of interest....high binding capacity. In addition, PVDF membranes can be repeatedly stripped of an antibody and reprobed...plasmids encoding antibodies from Addgene that you can make on your own.  To narrow your search, first pay...useful readout for a number of cellular assays. They can determine protein interactions following immunoprecipitation...
  12. Easi-CRISPR: Generating Knock-In and Conditional Mouse Models

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    Blog Post
    ...yielding 1-10% knock-in. Read on to learn how you can make CRISPR mouse model generation easi-er! Generating...process takes ~8-10 months. With CRISPR (B), you can inject CRISPR components directly into a zygote and...repair, with researchers hypothesizing that they can efficiently integrate into the DNA through an HDR...sequence or place it far from the PAM; if not, you can add a silent PAM or guide mutation. Designing an ... How to use Addgene plasmids for Easi-CRISPR You can use Addgene plasmids to create a repair template!...insertion feature (e.g., a fluorescent protein), you can amplify the desired region using primers containing...the ssDNA construct as described in Figure 2.  You can also use Addgene plasmids to purify Cas9 protein....
  13. Filming Science Videos in the Age of Social Distancing

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    Blog Post
    ...presentations and interviews. But how can I adapt this setup for the lab, so we can get back to producing protocol...for free. We’re a small operation, so sometimes it can be a big challenge. But ask any filmmaker or videographer...on-screen, somebody who really knows the protocol and can guide viewers through. I know cameras, but we needed...the scenes footage in the last several years, you can usually see a director sitting in their chair not...some more important lab work from being done. You can watch the first video in our Intro to the Lab Bench...
  14. The Fluorescent Vegetables in Aptamer Soup

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    Blog Post
    ... aptamer? RNA is not inherently fluorescent and can be challenging to track intracellularly, but aptamers...to cells. Because it rapidly photobleaches, DFHBI can only be used for qualitative, but not quantitative...expression of coding RNA. Spinach-based riboswitches can be used as stable metabolite sensors for imaging ...developed in a study of artificial guide RNAs that can be used to simultaneously target cellular RNA to ...Broccoli has been developed into a split aptamer that can be used to investigate RNA assembly. The split aptamer...observed when these RNAs complex and the entire aptamer can hybridize and fold. (Alam et al., 2017). Yellow fluorescent...selection and directed evolution." Journal of the American Chemical Society 136.46 (2014): 16299-16308. PubMed...
  15. Grad School Advice Part 2: Building Community

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    Blog Post
    ...school has its ups and downs for everyone but you can come out on top if you leverage your community, think...'s) thesis defense. This wonderful piece of work can be found here: https://www.youtube.com/watch?v=lQGAsgjjBDI...post-doc project 19:55 - 22:40 : Improvements that can be made to the grad school process 22:41 - END : ...beyond graduate school. Ben J. Vincent is a Ph.D candidate in the Program in Genetics and Genomics at Harvard...
  16. Adeno Associated Virus (AAV) for Cell and Gene Therapy

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    Blog Post
    ...disease is caused by a mutation in a single gene, it can potentially be treated by correcting the mutation.... However, many diseases require techniques that can deliver gene therapies directly to the cells that... tools such as nanoparticles. These technologies can have serious adverse effects, and their immunogenic... human population. These pre-existing antibodies can interfere with virus-cell interactions and seriously...the immune system – patients’ own immune systems can develop antibodies that neutralize the AAV vectors...disease, and HIV. A notable landmark study showed significant clinical efficacy against a form of blindness... of LCA and mutations in RPE65 (n=3), showed significant improvements in vision over a period of 1 to ...
  17. Corralling and Cornering the Goldilocks Antibody

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    Blog Post
    ...different experiments/conditions can change binding ability – i.e., the antibody can no longer bind to the target...-target proteins), variability (separate batches can perform differently – happens when the antibody is...antibodies onto the mAb3D atlas website. This website can then be used by thousands of scientists to confidently...antibodies because of their immunoglobin component that can be produced in large “copies.” This homogeneity circumvents...antibodies cause research that cannot be reproduced and projects that cannot be completed. A 2015 review ...
  18. dTAG - You're it!

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    Blog Post
    ...particularly excited about the dTAG system as we can use it to evaluate the effects of rapid and selective...approaches. In addition, the dTAG system is versatile and can be used in both cell-based assays and mouse models...protein-of-interest, it is important to determine which terminus can accommodate the FKBP12F36V tag without disrupting...disrupting protein function. A literature search can help determine which terminus is favorable for tagging. However...terminus should be tagged, the dTAG lentiviral plasmids can serve as a rapid means of comparing functionality...Behnam Nabet, a postdoctoral fellow at Dana-Farber Cancer Institute. Targeted protein degradation In the ...PhD is a postdoctoral fellow at the Dana-Farber Cancer Institute. He is a chemical biologist interested...
  19. Cultivating Community Science at BosLab

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    Blog Post
    ...what appears to be a funky old garage, but looks can be deceiving. Step into this building and you will...volunteers. Transforming citizens into scientists Anyone can become a member of BosLab and previous laboratory...environment, and openly publish protocols so that anyone can engineer yeast to do similar things. The focus is... To learn more about what we’re up to or how you can help BosLab, visit our website and follow us on twitter...
  20. Fluorescent Protein Travel Awards - FLiPs and Fluorescent Protein Biosensors

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    Blog Post
    ...-inducible Proteins (FLiPs) Fluorescent proteins can be applied in a long list of creative ways. In her...photoswitchable fluorescent proteins to create enzymes that can be turned on and off with light.  Xin hypothesized...presented her work at the 2017 Winter qBio Meeting. You can learn more about Xin’s work with photoswitchable ...expression of GFP from the lac operon. GFP expression can then be used to determine the amount of HMO originally...Zhou and Fatima Enam. There were many excellent applicants but Xin and Fatima stood out for their creativity...
Showing: 681 - 700 of 1071 results