We narrowed to 801 results for: DES

... as the OG (as the kids say) affinity reagents deserved to be celebrated, there are many other amazing...its thorns and every affinity reagent has its downsides. These reduced-in-size options often have reduced...°C and can refold correctly after denaturing.  Designed ankyrin repeat proteins, or DARPins, are genetically...a wide variety of targets, including proteins, peptides, amino acids, drugs, metal ions, and cells. They...

...molecular biology experiments was in the job description, but this skill is not just about reacting to...puzzling through your broader research questions and designing future experiments. Being able to work through...research non-academic careers, I always felt that descriptions of transferable skills seemed fuzzy or ill-defined...most likely cause, you implement an experiment designed to fix the problem. Then you assess whether your...

...we would be remiss not to at least mention. Oligonucleotides allow for sensitive detection of low abundance...strong protein-protein interactions with other peptides, like an Fc-binding domain (Figure 1).  ...Strong protein-protein interactions with other peptides. Created with BioRender.com.     Many biologists... conjugation. But hopefully, this introduction provides a good base from which to dive deeper!References...

...another. If you are using barcodes (and you should be!) bear in mind that your barcodes are being applied to...containers, not to the contents. Tightly coupling barcodes and containers might not be such a bad idea, tightly...Resources on the Addgene Blog Learn about How We Use Barcodes in the Lab Get Tips on How to Keep a Lab Notebook...

... nuclease activity of the Cas9 nuclease itself. Design and testing of eSpCas9 Looking at the structure...and the negatively charged DNA and therefore destabilize basal strand separation. This decreased strand... choice and get improved on-target specificity. Design and testing of SpCas9-HF1 Kleinstiver et al and...Joining Repairs Double Strand Breaks Get Tips on Designing Your gRNA Browse Our CRISPR 101 Series Resources...

... They fused the Cas enzyme to cell-penetrating peptides and co-incubate it with an “assist peptide” that...with a 30-minute incubation, even with multiplexed guides. Figure 1: A) Cell-penetrating Cas9, fused...all applications. Addgene’s plasmid collection includes over 10,000 plasmids with a FLAG tag (!), but ...recombinant antibodies as well? Our collection includes a mouse and a chimeric rabbit (original mouse ...

... developed based on 100 structure-guided spike designs and has improved protein yields and stability. ...Plasmids deposited from Alejandro Balazs’s lab includes those for generating pseudovirus and those encoding...Liu Y, Chou C-W, Byrne PO, Hjorth CK, Johnson NV, Ludes-Meyers J, Nguyen AW, Park J, Wang N, Amengor D, ...Finkelstein IJ, McLellan JS (2020) Structure-based design of prefusion-stabilized SARS-CoV-2 spikes. Science...

...tools, they do have undesired off-target editing effects. ABEs have been described to introduce base changes...efficient. Informed by these mutations and previously described TadA mutations (Gaudelli et al., 2017), they modified...heterodimeric fusion of wild-type TadA and TadA7.10, they designed one set of ABE8’s similarly (ABE8.x-d). In order...

...soCoChR-expressing system. Taken together, Shemesh et. al. describe a novel system for the precise mapping of neuronal...the single-cell level. Various soCoChR plasmids described in this work including the soCoChR-GFP plasmid...information about spatial and temporal organization. The design use to detect PKA activity can be generalized to...choice for FRET assays where a dark acceptor is desired due to its very low quantum efficiency. ShadowY...

... allele decreases. Crossing mice to generate a desired phenotype Instead, genetic engineering should be...in the journey towards producing mice with your desired combination of mutations. Assuming your parental...generate mice that are homozygous for all of your desired genes. Remember Punnett squares from high school... are homozygous (or hemizygous) at all of your desired alleles to conduct your experiments. You should...

...newer generation lentiviral packaging systems were designed to prevent the formation of replication competent...use 3 plasmids; an envelope plasmid that usually encodes VSV-G, a packaging plasmid containing structural...transfer plasmids with small inserts (such as CRISPR guides) while a single 72h harvest is best for larger ...the best titer possible. While this information provides a great starting point, it may not translate to...

...for affecting change. On Friday, the symposium includes a panel discussion and keynote by former congressman...towards solutions. The 2015 Boston FoR meeting was designed to explore areas where further data is necessary...for students interested in leading the process despite the recent advance. Similarly, grad students throughout...development and implementation of new strategies designed to cope with current increases. These two rulings...

...for Cas9 (42 nt vs 100 nt.) However, the newly described non-CRISPR protein NgAgo is smaller than any of... of these options (2.7 kb with 24 nt guides), so it has the potential to eclipse any of the CRISPR nucleases...to examine Cpf1 off-target editing. First, they designed gRNAs with single and double mismatches throughout... endjoining (NHEJ). Cas9-mediated NHEJ usually destroys the PAM site due its proximity to the cleavage...

...switches? FLEx (or “flip-excision”) switches were designed as a genetic tool for researchers to conditionally...does the FLEx switch work? Let’s say you want to design a genetic FLEx switch that turns BFP expression...single gene deleted in your knockout mouse, you can design a FLEx switch conditional knock-in cassette. As...experiment with a wildtype copy of a gene, you can also design FLEx switches to conditionally test the function...

...navigate a global pandemic can also be the thing that provides a new perspective that helps to clarify the harder...to introduce yourself to a few members of your desired department during the application process. Many...However, an online meeting with members of your desired program will allow for you to have the time and...during my application cycle, two schools on opposite sides of the country had scheduled visitation days during...

...interest from its production site to its final destination. As an example, most secreted proteins are produced...pathway to their subcellular or extracellular destination. At the end of their life cycle, proteins may... about the subcellular structures your protein resides in and potentially which other proteins it forms...in Figure 2 (adapted from 4) - Dunn et al. 2011 provides an in-depth review of quantitative colocalization...

...results can be affected by DNA quality and primer design, particularly for amplicons under 100 bp (Ma, 2015... concern, look for the lowest-cost option that provides you confidence in the results you need.  Whichever...by running the product on a gel. And only ddPCR provides absolute quantitative data, instead of relative...Polymerase Chain Reaction (PCR) Protocol: How to Design a primer  Molecular Biology Reference Molecular...

... thanks to our guest blogger, Laura Desrochers! Laura Desrochers is currently a Postdoctoral Scientist...Apr 6, 2021. This post was contributed by Laura Desrochers, a postdoctoral scientist at AstraZeneca. Why...ve discovered.) As someone who has now seen both sides of the postdoc experience, I’m going to share what...

...die from cancer-related complications each year. Despite these grim statistics, new strategies for attacking...cancers, especially those of the pancreas and colon. Despite the prevalence of Ras mutations in a variety of... enabled researchers to begin discovering and designing molecules that are showing some promise in their...in the screenshot below). Currently, the page includes interactive maps for the Ras, mTor, and p53 pathways...

...researchers must co-transfect cells with 5’-P-ssDNA guides and an NgAgo expression plasmid to edit a gene ...Try NgAgo for Yourself On the other hand, the widespread success of CRISPR-Cas9 across multiple model ...vector or in vitro synthesis, which could be less desirable if one has to target multiple sites in a single...of the supposedly alien 5’-phosphorylated ssDNA guides, which might be rapidly degraded by the cellular...

...with various spacer lengths from 30-84 nucleotides, and designated this system REPAIRv1. Using next-generation...introduced through non-homologous end joining (NHEJ). Designing an RNA editor The Zhang lab envisioned a two-component...that interact with duplex RNA, they hoped to destabilize ADAR-RNA binding to decrease off-targets. Of ...

...are no exception to this effect -- meticulously designed experiments in labs around the world were put ...requests correlate with paper publication The dataset includes 11,426 plasmid requests over 6 years for 35 papers...into two components: 𝜃x(t) and 𝜓z(t). 𝜃x(t) describes the exponential decay process we observed, while...model for each region using stochastic gradient descent in Pytorch, which gave us the maximum likelihood...

... on single papers could be more important.  Any slides, presentations, recordings, and other materials...those who were unable to attend. We capture the desktop and audio recordings of the meeting using teleconferencing... ensure that the journal club is useful for the widest audience, you should get feedback from those who...served. I hope that with some of the information described above you feel empowered to start your own journal...

...they wrote the job description. You check off all the boxes - you have the desired degree, you have mastered... gaps in scientists' transferrable skills. In describing the limitations of the study, the authors noted...over email. Examine your current and past job descriptions. Scan through all the things for which you are...

...transfecting cells with a plasmid, such as PX459, which encodes Cas9 and contains a site for inserting a custom...targeted approach using RNPs has recently been described in vitro, with the hope of eventually using this...expertise. Final thoughts The Cas9-gRNA RNP method provides scientists with an additional means to deliver...other CRISPR delivery techniques Find tips on gRNA design Resources on Addgene.org Browse all CRISPR plasmids...

...whole field to a grinding stop and only now, 2 decades later, is it finally back in the limelight. On ...(such as viral vectors) without triggering a destructive inflammatory immune response. At the time, adenoviral...follow in the footsteps of Luxturna™. However, despite promising results in preclinical studies some potential...technology: engineering of new capsid variants, designing expression cassettes to regulate and optimize ...

...that’s suitable for PCR amplification using pre-designed primers. By using this library to infect an animal...isolate DNA from the infected animal and use the pre-designed primers to determine which version(s) of the capsid... (figure 4f) of the tTA inducer virus, but the desired sparsity of labeling is achieved with lose doses...Cre-dependent selection yields AAV variants for widespread gene transfer to the adult brain. Nature biotechnology...

...those seen when using a plasmid backbone that was designed specifically for transient expression (find some...expression of viral constructs is a useful tool as it provides a means to quickly check that a construct is functional...3rd-generation transfer plasmids have a chimeric 5'LTR that includes a CMV or RSV promoter as well as a portion of ...those three genes plus tat. The envelope plasmid provides a heterologous envelope for pseudotyping and is...

... meliloti, Rhodobacter sphaeroides, R. capsulatus, Rhodopseudomonas spheroides, Salmonella spp., Serratia...Brevibacterium methylicum, Caulobacter crescentus, Desulfovibrio vulgaris, Erwinia carotovora, E. chrysanthemi...meliloti, R. leguminosarum by. viciae, Rhodobacter sphaeroides, Salmonella typhimurium, Vibrio cholerae, Xanthomonas...

...The hardest part of any revolutionary discovery, including CRISPR, is turning potential into impact. ...two pieces: a single protein, computationally described as a fusion of four Cas7 proteins and a putative...RNA editing methods — streamlining experimental design and its potential for clinical applications. Specifically...high-fidelity rate. Both Cas7-11 and PASTE open up multitudes of possibilities at the bench and potentially...

...pseudotyping allows these viruses to infect neurons. Besides altering the host tropism of your virus, there ...neurons. However, VSV-G’s broad tropism can be undesired for in vivo studies since there’s the potential...VSV-G is also toxic at high concentrations as described above and is inactivated by the complement system...proteins that can be used for specific purposes as described previously (Table 1, Gutierrez-Guerrero, et al...

.... After months, or years, of grueling effort to design, fund, and conduct a research project, the vast...provide more than enough time for researchers to describe their science, and for viewers to decide if reading...is of interest. In his research, Scott Spicer concludes that “… the emergence of the video abstract genre...websites). WeShareScience is a social platform that provides links to the videos, keeping the copyright and...

...client might need help with the intricate task of designing a strategic vision for a portfolio of candidate...content-rich, easy-to-understand set of PowerPoint slides. What are some of the more challenging parts of...enjoy the challenges of healthcare consulting for decades, others go on to work with commercial teams at ...nature of the job and the ways to prepare for it. Besides those conversations, reading online healthcare ...

...whichever guides are closest to the transcription start site (TSS). We recommend targeting the guides to a ... you should also be ready to test three or four guides directed towards that gene as there can be a large...transcription. That being said, we generally pick guides by putting the promoter of the gene into a gRNA...

...the time of manuscript submission. The rationale includes increasing the ability of reviewers (and, once...issue by requiring ever more condensed methods descriptions, legends and limiting numbers of figures such...could be mitigated by on-line services such as SlideShare, Figshare and Dataverse. Just as Addgene helps... raise the alpha isoform of GSK-3 to the same (deserved) stature as the beta isoform. Follow him on Twitter...

...blot: we meet again. So useful, yet so finicky to design and optimize. Today we’ll cover the normalization...normalization can amplify other errors in experimental design and gel quantification. Figure 3: In a perfect...final blot. Quantifying the entire lane of protein provides a loading control that can be used for normalization...Antibodies 101: The Basics of Western Blotting Technical Design of a Western Blot Troubleshooting and Optimizing...

...Applying for a Faculty Position: the View from Both Sides," are summarized below. Check Out Erik Snapp's ...You want people to focus on you and your ideas. Slides will be     distracting. What is the big question...feedback. Many of these documents are too vaguely described in other sources of guidance or the document examples...single malt whiskies, but I remember the days of modest postdoc salaries all too well. If there's a group...

...pathological developments (Vieira et al., 2019) Besides their ability to regenerate, the axolotl has several...scientific history, highly characterized genome, and widespread utilization, Arabidopsis has made significant...Arabidopsis genome project marked the beginning of widespread Arabidopsis genetics research development. Arabidopsis...allows for easy cloning of constructs specifically designed for use in Arabidopsis. There are also important...

...same fluorescent markers, Brainbow 3.1 and 3.2 (described in the same publication) are unique because by...addition to the XFP in the construct, dBrainbow includes small epitopes fused to each XFP. Secondary antibodies...introduced using a plasmid construct called Zebrabow-GateDest containing an RFP, CFP, and YFP downstream of ...cell type. The Confetti mouse was first used to describe the self-renewal of cells in the intestinal crypt...

...cofactor binding proteins as described above. The smallest tags are peptides that are engineered to bind...homology domains can be used to detect specific phosphoinositides (Varnai and Balla, 2008) (Figure 2). RNA production...Péter, and Tamas Balla. "Live cell imaging of phosphoinositides with expressed inositide binding protein domains...

...expression to specific tissues and cell types. If desired, spatiotemporal control of transgene expression...systemic AAVs to find commonly used vector cargo designs and administration doses. Note: If capsid immunogenicity... Table 1 gives a brief overview of published descriptions of commonly used or emerging capsids. Selected..., B.E., Gradinaru V. Systemic AAV vectors for widespread and targeted gene delivery in rodents. Nature...Cre-dependent selection yields AAV variants for widespread gene transfer to the adult brain. Nature Biotechnology... prioritization for cell type-specific enhancer design. eLife,11, e69571. https://doi.org/10.7554/eLife...

...every item I tested was constantly tracked with barcodes and spreadsheets. It was great to be in the lab...industry positions. There were, however, some downsides to working in a large commercial company. In my...aspects of the company and gave me the freedom to design new projects and grow in the role. I understand... job different every day. I love the freedom to design and develop my own projects, but working remotely...

...response element (RRE), an internal promoter, and the desired gene (transfer vector plasmid), 2) the HIV-1 genome...process is to test several protocols that have been described (protocol 1, protocol 2, protocol 3) to find the...quantify viral RNA. All of these methods have been described in a previous Addgene blog Once you know your ...Miller, A. DUSTY, and C. A. R. O. L. Buttimore. "Redesign of retrovirus packaging cell lines to avoid recombination...

...to be present and recognizable by your antibody despite the manipulation. Additionally, not all sample ...large deletion that removes the entire exon that codes for the epitope recognized by your antibody. You...specific, then you expect that the bulk of the peptides identified to be from the target protein. This...tuned for ready-to-use antibodies from Addgene Designing a recombinant validation experiment? Find plasmids...

...uncertainty of it all. Though I had spent the first few decades of my life following a very straightforward conveyor... harassment in academia or a large company who decides how they are going pursue regulatory approval for...their Local Engagement Playbook for step-by-step guides on how to engage in your local community.  Read...comprehensive resource developed by Dr. Kelly Singel which provides an overview of all available science policy fellowships...

...end-joining, but will also efficiently ligate many undesirable structures, including substrates containing gaps...fidelity") better than T4 DNA Ligase (21, 25, 26). Despite this higher fidelity, Taq DNA Ligase can still ...possible NN pairs in the template. The probes were designed such that each possible pairing resulted in a ... high fidelity ligase, along with careful probe design and reaction condition optimization, will be critical...

...above 600 nm. LumiFluors Schaub, F.X., et al. (3) designed two imaging probes. One consists of NLuc fused...Reporters. The LumiFluor reporter constructs were designed to be packaged into a retrovirus for infection...BRET probe for imaging. These authors set out to design a better fluorescent protein that could be co-imaged...acceptor, the more powerful the FRET signal. In well-designed FRET-based biosensors, the intensity of the FRET...

...update, we have added new sections to share and describe some incredible new CRISPR technologies developed...much-anticipated prime editing section and additions describing CRISPR’s ability to make large genome edits using...transposases or the Cascade-Cas3 system. We also describe newly engineered Cas9s with more flexible requirements...

...been infected with a microbe, to trigger immune cascades that clear these infections. Anything that generates...immune response and initiates different immune cascades. In the research setting, antibodies of different...antibody, which recognizes the primary antibody and provides the method of detection. You’ll also want to use...used for. Addgene’s Antibody Plasmid Collection includes plasmids that express antibodies, nanobodies, ...

...When performed correctly, fluorescence microscopy provides a high contrast image in which a bright signal...specificity to the viewer. Finally, modern microscope designs may further exploit the unique characteristics ...one object in the final image. Over the past two decades a number of techniques have been developed that...resolution and decreased phototoxicity. Lightsheet designs that allow for multi-view imaging can image thick...