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  1. CRISPR Challenges: Standardization and Homology Directed Repair

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    Blog Post
    ...sub-pathways like synthesis-dependent strand annealing (SDSA) and single-strand DNA incorporation (ssDI). "Easi-CRISPR...These complementary goals are aimed at improving translation of CRISPR technology, but they would also bring...a DNA repair newbie - diagrams of resection and strand invasion are like a foreign language to me. But...supports over 250 genomes, and they just released a brand new CRISPOR manual to kick off 2018! "Mechanisms...
  2. Single-cell tracking of lineage and identity with CellTag

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    Blog Post
    ...reprogrammed into iEPs by retroviral expression of transcription factors Foxa1 and Hnf4α, a process that like...reprogramming (CellTagMEF), at the end of the three-day transcription factor reprogramming treatment (CellTagD3), ...determined by at least day 13. However, distinct transcriptional states were seen as early as day 6. All together...MettI7a1 encodes an uncharacterized putative methyltransferase. Adding Mettl7a1 to the standard Foxa1-Hnf4α...tagging two cell populations in a competitive transplant assay in the mouse intestine, demonstrating its...
  3. Three Tips for Preventing Viral Plasmid Recombination in Your Samples

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    Blog Post
    ...recombination, one resulting plasmid carries the transgene of interest (aka the viral genome) and the other...resistance gene and origin will replicate, and the transgene will be lost. Over time, bacteria containing the... grow! Our 5 Tips for Troubleshooting Viral Transductions will help with the next steps.   References...recombination of plasmid DNA without affecting mRNA translation efficiency or half-life. RNA 25:507–518. https...common lab E. coli strains Find tips for viral transduction  ...
  4. What Do I Do Now? Academic v. Non-Academic Career Decisions

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    Blog Post
    ...encompasses millions of choices including pharma, tech transfer, management consulting, science communication,...into industry.” In his article On Leaving Academe, Terran Lane is asked by his colleagues and friends why...tell you to pick up the pace Constant worry about grants and renewals What is different about non-academia...outsource a task someone else who can do better, no grant writing Job changes can happen regularly (every ...where you want to go will help you focus on the transferable skills that you will need to get there. Additional...
  5. Crowdfight, a Platform to Boost Scientific Collaboration During COVID-19 and Beyond

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    Blog Post
    ...with viruses or transmissible diseases, so we were left with no choice but to quarantine in our houses,...simpler and the volunteers helped with things like translations, bibliographic searches, etc.     Expanding...we call “asymmetric collaborations.” These are transient partnerships where a researcher makes a small ...blog post about remote collaborations Read our Transferable Skills Guide article about external collaborations...
  6. Reagent Repositories Are Speeding up Science During the Pandemic

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    Blog Post
    ...scientific community. Addgene was awarded a Fast Grant to ensure that the scientific community will continue...-2. The resurgence in popularity of the hACE2 transgenic mouse strain, for example, is sustained by the...University of Iowa (McCray et al., 2006), the hACE2 transgenic mice were designed after it was discovered that...Deposits of new reagents, policies from journals and granting agencies requiring materials to be deposited into... implications for clinical manifestations, transmissibility, and laboratory studies of COVID-19: an observational...
  7. Components of CRISPR/Cas9

    Type
    Blog Post
    ...loci. 3. Cleave target DNA resulting in a double-strand break (DSB) Cas9 and its variants have two endonuclease...positions the nuclease domains to cleave opposite strands of the target DNA. Thus, the end result of Cas9...arrays as found in the bacterial genomes are transcribed into pre-crRNAs containing both the spacer region...RNase III, the tracrRNA and Cas9, bind to these transcripts and C) cleave them leaving mature crRNAs bound...target DNA which is E) cleaved leaving a F) double-strand break. A “gRNA” is a researcher-designed hybrid...
  8. 15 Years of Addgene: The Top 15 Plasmids

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    Blog Post
    ... different cell types so it is useful in a wide range of applications. This plasmid was the top requested...pSpCas9(BB)). The 2A-GFP allows for screening of transfected cells. Find pSpCas9(BB)-2A-GFP (PX458). lentiCRISPR...lentiCRISPR v2 - This 3rd generation lentiviral transfer vector also from the Zhang lab is used to deliver... David Root lab is a 3rd generation lentiviral transfer plasmid for cloning and expressing new shRNA sequences...the necessary elements for packaging, reverse transcription, and integration needed for the production of...
  9. A Quick Guide to a Career in Software Product Management

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    Blog Post
    ...alone. A few years ago when I started my career transition from bench science to software product management...explaining more of her role, which eventually led me to transfer to her team and begin my product management (PM...science backgrounds, most did not. It was my job to translate complex lab operations workflows into a format... help improve their work. Then, I distill and translate that valuable information back to the rest of ...science companies, try to find internships with translatable skills: working with data, working with people...
  10. Antibodies 101: Conjugation

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    Blog Post
    ...microscopy, flow cytometry, or spectrophotometry. The range of fluorophores available for antibody conjugation... choice for ELISAs.  Biotin Biotin is used in a range of antibody-based assays. Biotin itself is not visible...Endogenous carbohydrates added to antibodies post-translationally. 4) Modifications made to antibodies, such ...commercially conjugated antibodies available, that never guarantees the antibody you need will be conjugated, or ...Stephenson W, et al (2017) Simultaneous epitope and transcriptome measurement in single cells. Nat Methods 14:...
  11. Seven Tips for Using LinkedIn as a Scientist

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    Blog Post
    ... Also, many people on LinkedIn don’t appreciate random requests without a personal message and they may...trolls. People don’t like to connect with complete strangers as it borders on my first rule of networking--...a useful way to build or use a network. Total strangers can’t really help or refer you. Do not ask people... lot about requesting connections to complete strangers for informational interviews. Many have had success...considered intrusive and it’s still connecting with a stranger so is highly discouraged. You should be using ...
  12. Lighting Up Cell Signaling with Photoswitchable Kinases

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    Blog Post
    ...Signal transduction pathways are a lot like cell phone networks. Protein kinases deliver messages to ..., and how long their signals last all impact transduction of the message. To study signaling pathways,... game of telephone, often the signal must be transmitted by intermediate messengers. Optical control of...signaling by using psMEK1 and an ERK kinase translocation reporter with a mRuby2 fluorescent reporter ...feedback loops are a common feature of signal transduction pathways, but are often hard to decipher because...
  13. The Future of Research Symposium Boston 2015

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    Blog Post
    ...Ambika, et al. "Transforming training to reflect the workforce." Science Translational Medicine (2015)...better solution would be to reduce the number of entrants into PhD programs to more closely reflect the ...symposium. Eve Marder, professor of Biology at Brandeis University, has recently published an article ...Among other involvements, he helped to establish grants through the Sloan foundation for postdoc-related...
  14. Getting Started with Behavioral Neuroscience: Standardizing Experiments and Using Viral Vectors

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    Blog Post
    ... linked to a certain behavior. It is a very old branch of science, dating back several hundred years, ...genes. A popular method uses Cre recombinase on transgenic flox animals to introduce modifications at the...Timing: High expression levels of the viral vector trangenes typically occur two weeks after injection. Therefore... after several weeks which may also depend on transgene or promoter choice. Behaviors you can study using...Stoica L, Ahmed SS, Gao G, Sena-Esteves M. Gene transfer to the CNS using recombinant adeno-associated ...
  15. Viral Vectors 101: Virus Safety

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    Blog Post
    ...looks like the genetic cargo in one plasmid (the transfer plasmid), the envelope (Env) gene on a separate... plasmid). Viral production then proceeds by transfection of all three plasmids into a producer cell line...HEK-293T, production of viral particles, and transduction of a target cell line with those particles. ...Env, Gag, and Pol genes are not encoded in the transfer plasmid, the component that physically integrates...without endangering yourself or others. Happy transducing! Resources Resources on Addgene.org Addgene...
  16. Hot Plasmids and Viral Preps - March 2021

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    Blog Post
    ...editing assemblies are sensor-actuators, either transcriptional regulators or chromatin-modifying enzymes. ...cell surface. When the cells interact, GFP is transferred to the receiver cell, and the receiver cell turns...et al., 2021.   The AID system relies on a transport inhibitor response 1 (TIR1) expressed under a ...These libraries encode target sites flanked by randomized nucleotides in place of a protospacer adjacent.... Check out the new additions.  Image calcium transients in PV interneurons with AAV-S5E2-GCaMP6f, now...
  17. Hot Plasmids and Viral Preps - January 2021

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    Blog Post
    ...including excision or insertion, inversion, translocation or cassette exchange. By utilizing recombinases...delivery constraints and scientists seeking a wider range of targetable genomic sequences could benefit from...spatially and temporally target single cells. Now, Francois St-Pierre’s lab developed a new form of FACS-based...-based Dual-fluorescent DSB Repair) is a double-strand break repair assay for mammalian cells. It's based...deposited by Leopold Parts. This library delivers 2 randomly paired guides per construct and allows a reduced...
  18. Quickest Way to Deposit Plasmids: The Deposit Spreadsheet

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    Blog Post
    ...easy — our tech transfer team will communicate with your organization’s technology transfer office or other... Send plasmid information to Addgene Material Transfer Agreement (MTA) approval  Send plasmids to Addgene...require that you send your samples to Addgene pre-transformed in this strain. Hazardous If the plasmid...samples to Addgene and contact your technology transfer office about the MTA. Pro Tip! Download a new...
  19. Cpf1 Update: Comparison to Cas9 and NgAgo

    Type
    Blog Post
    ...pattern opens up the possibility of directional gene transfer, analogous to traditional restriction enzyme cloning... cloning. Sticky-end mediated gene transfer would be particularly helpful for targeting non-dividing cells...gene delivery due to their low immunogenicity and range of serotypes allowing preferential infection of ... yet characterized the potential “sticky end” transgene insertion mediated by Cpf1-generated overhangs...Alkhnbashi OS, Costa F, Shah SA, Saunders SJ, Barrangou R, Brouns SJ, Charpentier E, Haft DH, Horvath ...
Showing: 541 - 560 of 986 results