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We narrowed to 803 results for: POR

Showing: 441 - 480 of 803 results
  1. Making CRISPR Plasmids Using Fragmid

    Type
    Blog Post
    Published
    Aug. 29, 2024, 1:15 p.m.
    ...New to the bench? Fragmid depositor John Doench reports even the greenest members of his lab, high school...modular cloning approach, it’s easy to switch out reporters, Cas proteins, guide cassettes, promoters, N’ ...vectors are available? What you’re building is important — but so is where you’re building it! Table 1 ...
  2. 5 Tips for Troubleshooting Viral Transductions

    Type
    Blog Post
    Published
    Aug. 11, 2016, 2:23 p.m.
    ...that infect bacteria), many of which are doing important work in our microbiomes. Given that viruses are... and the type of virus, there have been varied reports of titer losses from 5% to 50% per freeze thaw ...vector: optimization of conditions for storage, transport and delivery." Japanese journal of cancer research...
  3. Cpf1 Update: Comparison to Cas9 and NgAgo

    Type
    Blog Post
    Published
    July 14, 2016, 2:30 p.m.
    ...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...efficiency across CRISPR nucleases and NgAgo is an important next step for the field. Based on what we know...
  4. Reaching out to China: Canton Nucleic Acids Forum (CNAF) 2015

    Type
    Blog Post
    Published
    Dec. 1, 2015, 3:30 p.m.
    ...still working at the bench. It was a fantastic opportunity to talk to so many scientists who were potential...field. Nobel Laureates and the ever expanding importance of RNA The second keynote lecture was presented... labs are using CRISPR/cas9 and more are being reported. Zhou Songyang from Baylor College of Medicine...
  5. Quick Guide to Working with Drosophila Part 1: Getting Started with Flies

    Type
    Blog Post
    Published
    July 13, 2017, 2:30 p.m.
    ...combs. To make genetic crosses properly, it is important to isolate females from males while they are still... after hatching into their adult phase. It is important to clear out the parent crosses from the container...feature when setting up genetic crosses. More importantly, this knowledge will stop you from embarking ...
  6. Hot Plasmids: Winter 2025

    Type
    Blog Post
    Published
    March 11, 2025, 1:15 p.m.
    ...all the components of the biosensor in optimal proportions from a vector backbone that allows lentiviral...Waldron We recently added two antibodies against important targets for neurodegeneration research: Anti-MAPT...6E10-A5] in Immunohistochemistry (Human). Addgene Report, doi: https://doi.org/10.57733/addgene.6ncijt.  ...
  7. The AAVantages of AAV in CRISPR Screens

    Type
    Blog Post
    Published
    Feb. 4, 2025, 2:15 p.m.
    ...CRISPR screens rely on lentiviral systems, a fact supported by the wide array of lentiviral-based CRISPR libraries...locations that could cause deleterious effects. It is important to note, however, that while AAV rarely integrates..., CRISPR may increase this rate. Specifically, portions of the AAV genome can integrate at double-stranded...
  8. Magnetic Control of Proteins: More than a Dream

    Type
    Blog Post
    Published
    Sept. 24, 2024, 1:15 p.m.
    .... Andrew and Maria were encouraged by previous reports that described magnetic responses of cryptochrome...reproduced their EGFP findings since the initial report in 2023.)     Figure 1: Fluorescence intensity...frequent collaborator and is happy to give advice and support for follow-up studies. “We don’t have a vision ...
  9. Mobile-CRISPRi: Bringing CRISPRi to Diverse Bacteria

    Type
    Blog Post
    Published
    April 4, 2019, 12:53 p.m.
    ...experiments where maintaining library diversity is important, while lower transfer rates are only suited for...measured by knockdown of a constitutely expressed RFP reporter, was variable across bacterial strains, ranging...Klebsiella pneumoniae, and P. aeruginosa (all opportunistic pathogens) were grown in presence of trimethoprim...
  10. Genome-wide Screening Using CRISPR

    Type
    Blog Post
    Published
    Aug. 18, 2015, 2:30 p.m.
    ...post was updated on Aug 20, 2020. What genes are important in your phenotype of interest? Many scientists...not entirely known. Identifying which genes are important for a phenotype can lead to a wealth of additional...strong evidence that a particular gene is actually important for a given phenotype. Each hit from the screen...
  11. Drew Endy Introduces the Biobrick Public Agreement Plasmid Collection

    Type
    Blog Post
    Published
    Dec. 12, 2013, 3:35 p.m.
    ... These parts have been carefully engineered to support reliable functional composition. In other words...YouTube primer on BIL gates.) Addgene: Why is it so important to you that these parts be made freely available...language is put into practice? Endy: I think it's important to understand that these platforms, or pieces ...
  12. The Effect of COVID-19 on Liu Lab Plasmid Requests From Addgene Data

    Type
    Blog Post
    Published
    July 16, 2020, 1:15 p.m.
    ...dramatically when there are many new COVID-19 cases being reported (right, red), likely due to quarantining {%...chose to re-examine our global data at a finer temporal granularity. For each paper, we observed that ...parameters from relatively sparse data from China. An important additional caveat is that our dataset contains...
  13. Antibodies 101: Producing Recombinant Antibodies

    Type
    Blog Post
    Published
    Aug. 13, 2024, 1:15 p.m.
    ...for further processing. It may be helpful to incorporate regular feeds during this incubation time to ...immunohistochemistry, and immunocytochemistry. It’s important to note that some antibodies are better suited...Rockberg J, Chotteau V. Small-scale bioreactor supports high density HEK293 cell perfusion culture for...
  14. Droplet Digital PCR for AAV Quantitation

    Type
    Blog Post
    Published
    Jan. 16, 2020, 2:18 p.m.
    ...by ddPCR begins with diluting the virus. It is important to note that the dynamic range of the ddPCR is...PCR plate. Maintaining a high droplet count is important for calculating the concentration of your sample...separation (Witte et al., 2016). This is particularly important if your amplicon is longer than 150 base pairs...
  15. Lentiviral Vector Uses and Overview

    Type
    Blog Post
    Published
    May 19, 2016, 2:30 p.m.
    ...transduced rat neurons in vivo with beta-gal and other reporters, and they showed that expression persisted for...Figure 2). The HIV genes that do remain are very important for viral production: Gag (structural precursor...activation from the 5’ LTR) and Rev (facilitates nuclear export of transcripts). A different viral envelope protein...
  16. CRISPR Antimicrobials

    Type
    Blog Post
    Published
    May 3, 2016, 2:30 p.m.
    ...species, or even an antibiotic resistance gene. Importantly, native, non-pathogenic bacteria remain to help...recolonize the niche, reducing the chance of an opportunistic infection like for organisms like C. difficile...colonization model, phagemid treatment decreased the proportion of virulent S. aureus from 50% to 11% in just...
  17. Cpf1: A New Tool for CRISPR Genome Editing

    Type
    Blog Post
    Published
    Oct. 14, 2015, 2:30 p.m.
    ...After sequencing and searching for cellular RNAs important for Cpf1 function, they found that mature crRNAs...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...
  18. CRISPR 101: Targeting RNA with Cas13a (C2c2)

    Type
    Blog Post
    Published
    Sept. 21, 2017, 2:07 p.m.
    ...of interest and an inactivated fluorescent RNA reporter. If the target sequence is present in the pool...activity of Cas13a becomes activated and the RNA reporter will be cleaved resulting in activation of the...in the field and as always, we appreciate the opportunity to share these invaluable reagents with the scientific...
  19. Twenty Years of Sharing: Addgene's Viral Vector Service

    Type
    Blog Post
    Published
    July 30, 2024, 1:15 p.m.
    ...from 2016–2023 by type of tool. Equally as important to what is being delivered is where it’s being...vectors not only available, but accessible. The supporting data and community engagement required to do ...lessons learned from this process have shaped and supported our growth and development. We’ve shared what ...
  20. New CRISPR Tools: Cas7-11 and PASTE

    Type
    Blog Post
    Published
    Feb. 17, 2022, 2 p.m.
    ...RNA editing - and further experiments strongly supported their initial findings.  The team originally suspected.... Specifically, efficacy rates of Cas7-11 were reported as up to 85%, broadly similar to shRNA and Cas13...However, in those same comparisons, the AbuGoot lab reported no detectable effect on cell viability – meaning...
  21. Advancing Biology with Zebrafish: Genetic Tools for Developmental Studies and More

    Type
    Blog Post
    Published
    Aug. 13, 2019, 12:58 p.m.
    ...recent lineage tracing approaches that led to important insights in developmental biology. Microscopy-...pathway regulated by one-eyed pinhead, incorrect proportions of otherwise normal cell types are produced, ...PMCID: PMC6247916. Felker, A., and C. Mosimann. "Contemporary zebrafish transgenesis with Tol2 and application...
  22. New Tools Enable CRISPRa for Neuroscience Applications

    Type
    Blog Post
    Published
    July 2, 2019, 12:51 p.m.
    .... More importantly, the expression of this construct is Cre-dependent, enabling spatiotemporal control...astrocytes, and oligodendrocytes, provided that reporter genes specific to these cell types are used. The...
  23. "Hall of Fame" AAV Enhancers from the Allen Institute for Brain Science

    Type
    Blog Post
    Published
    Sept. 9, 2025, 1:15 p.m.
    ...evaluate the resulting expression of the fluorescent reporter, the brain tissue was extracted, sectioned, and...more neuroscience-focused tools in their Brain Map portal, and cell science-focused tools at the Allen Institute...expression from mouse to primate neocortex. Cell Reports, 34(13), 108754. https://doi.org/10.1016/j.celrep...
  24. Antibiotic Resistance: An Old Solution but a New Problem

    Type
    Blog Post
    Published
    Nov. 10, 2016, 3:30 p.m.
    ...this post will, indeed, focus on bacteria, it is important to note that the term ‘antibiotic’ can also be...animal farming is already being recognized as an important step, as you can’t walk into any supermarket now...Tackling drug-resistant infections globally: final report and recommendations." London: Wellcome Trust & ...
  25. Changing Labor Laws Bring Increased Postdoc Wages

    Type
    Blog Post
    Published
    Oct. 25, 2016, 2:30 p.m.
    ...Labor Thomas Perez, Fair Pay for Postdocs: Why We Support New Federal Overtime Rules, made clear that institutional...National Postdoctoral Association Institutional Policy Report 2014). However, ~30% set their minima lower. Furthermore...consensus of academic stakeholders. There was ample opportunity to accept these recommendations, and make gradual...
  26. Viral Vectors 101: Integrase-Deficient Lentiviral Vectors

    Type
    Blog Post
    Published
    May 13, 2025, 1:15 p.m.
    ...sequences, which facilitate integration of this portion into the host genome. The packaging plasmid contains...more detailed description). Since the integrated portion does not contain any of the viral packaging genes...the resulting double-stranded DNA transgene is incorporated into a large complex of both viral and cellular...
  27. Fluorescent Proteins 101: GFP Fusion Proteins - Making the Right Connection

    Type
    Blog Post
    Published
    April 9, 2019, 1:13 p.m.
    ...2016; Lambert, 2019). These characteristics are important, but have less priority than stickiness. In my...lead to over-expression artifacts. This is an important downside of the technology and should always be...fluorescent proteins in budding yeast." Scientific reports 9.1 (2019): 2234. PubMed PMID: 30783202. PubMed...
  28. The Fluorescent Vegetables in Aptamer Soup

    Type
    Blog Post
    Published
    Jan. 29, 2019, 2:27 p.m.
    ...split aptamer is composed of a “Top” and “Bottom” portion, each fused to a separate piece of RNA. Fluorescence...photostable, and were presented in the study to support the uniqueness of the photostability of the Corn-DFHO...growth as RNA biology, we are looking forward to reports on the next additions to aptamer soup! References...
  29. Students Invented a New Diagnostic for Lyme Disease — and a Tool for CRISPR Researchers

    Type
    Blog Post
    Published
    May 12, 2026, 1:15 p.m.
    ... et al., 2025); this joining generates a novel reporter sequence, which T4 polymerase uses as a template...sequence, Cas12a indiscriminately cleaves ssDNA reporters, freeing fluorophores to be captured in a lateral...producing the highest concentration of cleaved reporters in a head-to-head comparison. Figure 2...
  30. Antibodies 101: Introduction to Gating in Flow Cytometry

    Type
    Blog Post
    Published
    April 4, 2024, 1:15 p.m.
    ...signals. For this, you’ll need to gate based on the proportion between H and A (or W and A) within the same ... just as fine (Figure 4). As H and A scale in proportion (while H and W do not; see Figure 2), single ...                                                                                                         B.    Figure 4: (A) Using the proportional relationship between FSC-H and FSC-A we can ...
  31. An Integrin Antibody Toolkit from IPI

    Type
    Blog Post
    Published
    March 28, 2024, 1:15 p.m.
    ...in competition with other similar integrins, as reported by IPI and the Springer lab (Hao et al., 2024)...In this study, we, along with the Springer lab, reported the binding specificity, kinetics, and affinity...belief that αVβ3 would be the most functionally important integrin on these cells. What’s next IPI is working...
  32. CRISPR 101: Homology Directed Repair

    Type
    Blog Post
    Published
    Jan. 26, 2023, 2:15 p.m.
    ...invasion and D loop formation, the newly synthesized portion of the invasive strand is displaced from the template...DSB-induced genome engineering, it has biological importance for the repair of breaks that lack a second end...Cut-to-Mutation distance" affects editing efficiency. One important point to note is that Cas enzymes can continue...
  33. Scientific Reproducibility - Focusing on Solutions at the Minisymposium on Reproducibility

    Type
    Blog Post
    Published
    May 18, 2018, 7:32 p.m.
    ...findings can be predictably applied to future work. Importantly, no one should expect that every study should...of reproducibility for preclinical studies, as reported by drug companies attempting to apply the findings...and use computer based analysis techniques, an important component of reproducibility is making sure that...
  34. Tips for a 1st Time CRISPR User (by a 1st Time CRISPR User)

    Type
    Blog Post
    Published
    March 7, 2017, 3:30 p.m.
    ...of the gene with multiple gRNAs, but the most important is that you could avoid potential off target artifacts...you could run another gel that highlights the important results (for example, if you needed to make a ... Despite the shifting landscape of research opportunities, it’s an exciting time to be in the lab. Based...
  35. Mycoplasma Contamination: Where Does It Come From and How to Prevent It

    Type
    Blog Post
    Published
    Oct. 8, 2020, 1:15 p.m.
    ...mycoplasma contamination The best and the most important ways to avoid mycoplasma are by providing proper...viability. Conclusion To sum up, it is always important to prevent contamination rather than eradicating...others when you can and help them understand the importance of preventing contamination. Be aware and cautious...
  36. A Practical Guide to Optimizing AAV DIO and FLEx Vector Expression

    Type
    Blog Post
    Published
    Nov. 2, 2021, 1:15 p.m.
    ...fibrillary acidic protein (GFAP) for astrocytes it is important to test it in the brain region of interest, especially...of Transduction Efficiency, Tropism and Axonal Transport of AAV Serotypes 1, 2, 5, 6, 8 and 9 in the Mouse... the Addgene blog Plasmids 101: FLEx Vectors Important Considerations When Using AAVs Three Key Considerations...
  37. Starter Guide to induced Pluripotent Stem Cells (iPSCs) Part 2:  Reprogramming and Transdifferentiation

    Type
    Blog Post
    Published
    Nov. 6, 2018, 1:12 p.m.
    ... adenovirus [5], Sendai virus [6], plasmid electroporation (episomal) [7, 8] and mRNA transfection [9]...insulin-producing β-like-cells [37, 38]. In 1987, Davis et al. reported one of the earliest examples of transdifferentiation...differentiation from human pluripotent stem cells via temporal modulation of canonical Wnt signaling. Proc Natl...
  38. Prime Editing: Adding Precision and Flexibility to CRISPR Editing

    Type
    Blog Post
    Published
    Jan. 13, 2025, 9:49 p.m.
    ... DNA to favor the edit Once the prime editor incorporates the edit into one strand, there’s a mismatch...MutSα–MutLα mismatch repair (MMR) complex, to temporarily inhibit this process and promote copying of the...it from hybridizing with the unedited strand. Temporarily inhibiting this complex may allow time for 5′...
Showing: 441 - 480 of 803 results