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...easier to track translation in two different ways: by monitoring the first round of translation or by tracking...of relative reporter translation. Single molecule continuous translation tracking TRICK allows you to ...various stimuli on global translation, but a visual technique to study translation remained elusive. Two ...destination co- or post-translationally. TRICK: Visualizing the first round of translation While ribosome profiling...in the fluorescent signal: untranslated RNAs appear yellow, and translated RNAs appear red. To enable ...Using translation inhibitors cycloheximide and puromycin, Halstead et al. verified that translation is necessary...to see the first round of translation, but it doesn’t allow continued tracking of a given mRNA because ...

..., exo-AAV2 in mouse retina after intravitreal injection to transduce bipolar cells and photoreceptors ...22314290. PubMed Central PMCID: PMC3345986. Meliani, Amine, et al. "Enhanced liver gene transfer and evasion...PubMed PMID: 29296848. PubMed Central PMCID: PMC5728288. Schiller, Lara Timantra, et al. "Enhanced Production... vectors. They found that they have a higher transduction efficiency, i.e. the same number of AAV particles...particles is able to infect more cells (as demonstrated in different cellular environments such as retina...also found that exo-AAVs were more resistant to neutralizing anti-AAV antibodies. This is particularly useful...vivo where endogenous anti-AAV antibodies often neutralize the therapeutic efficacy of AAV vectors. How ...

...effort from acknowledging its existence. Studying ancestral group dependencies  Take, for instance, a recent... essentialist connections between biology and ancestral groups or, by extension, race. Many researchers...diligent scientist, they sought to understand these strange results by digging deeply into their data.   ...report the likelihood of any given sgRNA having an ancestral bias. Next, they worked with John Doench, David...looks like, which led to the incorporation of ancestral bias into genome-wide screens, introducing bias...doi.org/10.1101/2022.11.18.517155   Resources on ancestral bias and the human genome Wang, T., Antonacci-...

...friendships. I put “neutral” in quotations here because I would not have considered myself neutral in any of their... blog Management for ScientistsTransferable Skills Guide: LeadershipTransferable Skills Guide: Teamwork...stopped talking to each other if I was not there to arbitrate for them. They were different people with some... them would acknowledge later that without my “neutral” presence to alleviate those differences, they ...the right time. Like many of the posts in our Transferable Skills series, this post is not meant to be ... that you could strengthen. The right set of transferable skills, coupled with your technical skills, ...The source of those conflicts can frequently be traced back to one of a few trouble spots:  Communication...

...apply to programs, and apply for travel grants. Good luck and happy travels! Resources Resources on the ...remote collaborations Transferable Skills Guide: External collaborations Transferable Skills Guide: Teamwork...current institute. A common reason is hands-on training in a technique that only a few labs have expertise...this expertise will provide you with guidance and training so that you yourself can become an expert and ...for another reason. Visiting would allow you to train and acquire the data you need on the new instrumentation...new collaborations and fresh perspectives. For trainee level researchers, it can expose them to a new ... Identify reagents you will need, any required training, and a priority list of experiments you hope to...

...resources on the Addgene blog Transferable Skills Guide: Time Management Transferable Skills Guide: Conflict ...of being a scientist and an incredibly useful transferable skill. Being able to stand up in front of an... audience and convey your ideas clearly and strategically is powerful in almost any career. It allows ... applies: what can go wrong, will go wrong. The trash removal service slams dumpsters outside the open... turn your slide deck into a chalk talk. Your translator doesn’t know the term “diving board” so you end...messing up?–and use the three tips above to make a strategy that can help. Even something as simple as telling...remember to breathe!)   Public speaking as a transferable skill The worst thing about doing public speaking...

...Target strand The DNA strand that base pairs with the guide RNA.   Non-target strand The DNA strand that... non-target strand is excluded as ssDNA. DSB Double-Stranded Break A cut to both strands of DNA. Indel...editing generates double-strand breaks causing deletion, transversion and translocation. Nature Cell Biology...a job for a single enzyme. Base transitions Base transversions C → TG → A A → GT → C C → G                   ...to base pair with the DNA target strand, leaving the non-target strand unpaired and accessible on the outside...binding. Pro tip! In CRISPR, the non-target strand is the DNA strand that does not base pair with the gRNA.... it the “edited strand.” Uracil excision repair leads to the first base transversion editor The story...

...researchers feel they lack formal training in a variety of transferable skills. At Addgene, we've set out...evaluate potential strategies to resolve the problem.  Step Three: Decide on a strategy and implement it... highlighting that researchers do learn MANY transferable skills while working in the lab and by offering...where you might need some help. Today in our transferable skills guide: Problem-Solving. I don’t know ...potential sources of error and then decide on a strategy to fix the issue. I was problem solving!  You ... careers, I always felt that descriptions of transferable skills seemed fuzzy or ill-defined. In this ...it.  Step Four: Assess how effective your strategy was. If you didn’t quite fix everything or revealed...

...express a transposase or reverse transcriptase so they can transpose. Both class I and II transposons can be...eukaryotic genomes.  Components of a transposon system Transposon: The transposon is the DNA sequence that moves... encodes the proteins the transposon needs for transposition. Transposition protein: This is the protein...themselves as RNA transcripts and then rely on a reverse transcriptase enzyme to reverse transcribe back into ...reverse transcriptase and integrase enzymes which are required for LTR retrotransposon transposition. Non-LTR...reverse transcriptase activities.    Figure 1: Overview of retrotransposon transposition. Retrotransposons...2021. To mobilize a transposon, first the transposase enzyme binds the transposon’s long terminal repeats...

...DEAE-dextran can improve transduction efficiency. In addition, this study found that transduction efficiency...passage number of a culture the lower the transfection and transduction efficiencies. Cultures should only be...others opt for a single harvest after transfecting with the transfer and packaging plasmids. A benefit of...type may not translate well to other cell types. To overcome this issue, try transducing with a range ...Zhang, X.Y., Reiser, J.. "Production, concentration and titration of pseudotyped HIV-1-based lentiviral...vector titration and in the use of multiplicity of infection (MOI) for predicting gene transfer events... for getting the most out of your lentiviral transduction experiments. Love your cells and they'll love...

...NEB’s new teaching space at Lab Central to learn all about it. LabCentral is a lab and office space shared...because both LabCentral and Addgene aim to make scientific advancement easier. NEBNext Ultra FS DNA Library... prior NEBNext Ultra II DNA Library Prep Kit for Illumina, one was only able to extract libraries from...New England Biolabs (NEB) hosted workshop at Lab Central and discuss why these types of workshops could ...in a lab.   Participating in a workshop at lab central We’re working on a project where we aim to do large...throughput DNA prepping by trying out NEB’s new NEBNext Ultra II FS DNA Library Prep Kit for Illumina sequencing...people to take a break and relax. Companies at LabCentral get access to a variety of experimental services...

...your AAV packaging transfection. In my lab we regularly use the ratios below: 1 Transfer Plasmid : 1 pHelper...prevent future headaches. To help you plan PEI transfections for AAV packaging, considering using this PEI...Calculator. AAV packaging typically requires transfecting three plasmids at specific molar ratios. To ...PEI calculator for AAV packaging Use the PEI transfection calculator for AAV packaging Select the plasmid...pHelper: 1 RepCap OR 3 Transfer Plasmid : 5 pHelper: 2 RepCap Select what type of tissue culture dish ...dish you will be performing the transfection in: 15 cm dishes OR CF5 stacks Select how many dishes or ...or stacks you plan to transfect: 1 to 10 Fill in experimental details on the spreadsheet: Name your...

...researchers feel that they lack formal training in a variety of transferable skills. At Addgene we've set out... are a graduate student or post-doc in a traditional training program, and you hope to make a career in... highlighting that researchers do learn MANY transferable skills while working in the lab and by offering...any formal or mandatory professional development training. Further, even for those students and researchers...

...with a 3-part strategy: Train: Nearly every new Addgene employee gets “Lexicon Training.” Since the lexicon...you can be incredibly frustrating. Clarifying the words —> decreasing frustration —> increasing the happiness...and racks meant we had fewer errors in our LIMS tracking system. Though you might not have to communicate... lexicon is a “living” document, I update the training frequently. In hindsight, getting a list of frequently...resources on the Addgene blog Read about other transferable skills Find all of our science career related...

...an article describing a sucrose supplementation strategy to improve yield. In addition, as described in..., the team developed a viral genome sequencing strategy to confirm the identity and purity of all AAV ...! AAV purification by iodixanol gradient ultracentrifugation This video goes over AAV vector purification...protocol page for more detailed instructions. AAV titration by qPCR using SYBR green technology Here’s some...used to generate a standard curve, visit the AAV Titration by qPCR written protocol page. Getting started...

...competitive transplant assay in the mouse intestine, demonstrating its utility in long-term tracking in vivo...provides a combinatorial indexing strategy that simultaneously tracks clonal history and cell identity ...linking ancestral gene expression patterns with reprogramming outcomes (Biddy et al., 2018). Tracking lineage... tool that combines scRNA-seq and lineage tracking to track the dynamics of gene expression and clonal... of CellTag The Morris Lab developed CellTag to track the direct reprogramming of mouse embryonic fibroblasts...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), ...

...emission spectra for BV421 and BV711 on a 3 laser spectral flow cytometer   Using spectral flow When...autofluorescence extraction feature. Although autofluorescence extraction is an optional feature of spectral flow ...portion of that spectra to use for compensation.     Figure 1: The emission spectra and filters ...cytometer.   Spectral flow cytometry Full spectrum flow cytometry, or “spectral flow” cytometry, ... be distinguished using spectral flow since the machine uses the full spectral signature, not just a narrow...in the spectra can be used to distinguish these two fluorophores from one another during spectral unmixing...with spectral flow—you can run a three color panel or a 40 color panel! When preparing a spectral flow...

...Enhancer traps Like promoter traps, enhancer traps lack enhancer elements and require the trapping of endogenous...circumstances, trap methods may be the preferred screening option. Promoter traps Promoter trap systems lack... enhancer traps! However, don’t count the other traps out just yet. Gene and promoter traps unambiguously... up on their modern counterparts. What are traps? Traps – gene, enhancer, and promoter – all rely on...in fly, mouse, and yeast models. Why traps are useful Traditional genetic screens employ various on/off...expression of the gene they monitor. Gene traps Gene traps are promotor-less constructs that contain ...gene product resulting in a transcriptional fusion, much like promoter traps. While this system does not...

... the non-edited strand to encourage the cell to repair the DNA using the edited strand as a template —... ever lose track of which acronym is which. Acronym Full name Notes   Base transition Base change...our last post, we talked about the first base transversion editors: CGBEs, or C → G Base Editors. CGBEs...editor could excise other bases? Could other transversion editors be close at hand? Once again, this post... the end of this post! Figure 1: Base transitions are edits between the purine bases (adenine, ...bases (cytosine, thymine, and uracil). Base transversions are edits that convert a purine to a pyrimidine... Inosine excision leads to the first adenine transversion editors Uracil excision is the most common type...

...fluorescent protein (XFP) genes in a transgene. When multiple copies of the transgene cassette are introduced, stochasticity...delivery is more common than conventional transgenic strategies. In such vector-based gene delivery systems... XFPs in the original method, we used the Tetracycline trans-activator system to boost the expression ...expression levels, and we named the system Tetbow (Tetracycline trans-activator Brainbow) (Sakaguchi et al., 2018...Bio-Protocol 8 (2018): e3046. Livet, Jean, et al. "Transgenic strategies for combinatorial expression of fluorescent...troubleshooting your Tetbow experiment Plasmid concentrations and AAV titer - The XFP genes have to be introduced...highest color variations. Adjust the plasmid concentrations or AAV titer for the best results. The timing...