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Showing: 61 - 80 of 445 results
  1. Celebrating One Million Plasmids Shared!

    Type
    Blog Post
    Published
    Sept. 25, 2018, 2:39 p.m.
    ...will be moving into a bigger space so that we can make an even bigger impact - we are always on the lookout...Can you imagine how much space a million plasmids would fill? Two weeks ago, Addgene edged passed our...assembling the boxes, to inoculating tubes, and to packing and shipping. Every single day. 673 plasmids shipped... hard to picture one million plasmids. How much space would one million bacterial stabs take up? If 81...
  2. Scientific Sharing in the Time of COVID-19: Databases and Resources

    Type
    Blog Post
    Published
    May 12, 2020, 1:15 p.m.
    ... to scientists around the world. To support this pace of research, new, centralized databases and centers...protocols, publications, and more to accelerate the pace of research into COVID-19. While this program is...response initiatives. Accelerate the translational impact of research Universities have also been stepping...research synergies and accelerating the translational impact of research activities. By streamlining the development...by coming together, we can create a significant impact on both clinical care and public health for this...
  3. Year of the Camelid: Antibody Style

    Type
    Blog Post
    Published
    May 9, 2024, 1:15 p.m.
    ...to revisit some of the ways these animals have impacted humans through biomedical research. The Camelid...Camelid family is composed of camels, llamas, and alpacas (and their undomesticated counterparts) - not exactly...soon after found similar antibodies in llamas and alpacas (Figure 1). At the time, researchers were already...started with immunizing a camelid (usually llamas or alpacas). But because sdAbs are so amenable to recombinant...And I suspect we will only continue to see their impact grow as new sdAbs become easier to generate and...
  4. Why Add Sucrose? Improved Yields for Adeno-associated Virus Preparation

    Type
    Blog Post
    Published
    Dec. 13, 2018, 1:14 p.m.
    ...bioRxiv. AAV2 interacts with the packaging cell's cell membrane When packaging adeno-associated viral vectors... vector production. Whether redesigning viral packaging plasmids, investigating different viral production...heparan sulfate proteoglycans on the surface of the packaging cells (Vandenberghe, 2010). Rather than being ...prevent the uptake of AAV2 viral particles by our packaging cells by treating the cells with the endocytosis...
  5. Viral Vectors 101: What is a Virus (and a Viral Vector)?

    Type
    Blog Post
    Published
    Aug. 18, 2023, 4:15 p.m.
    ...Viruses are simple: a genome packaged in a protein shell (Taylor, 2014). They’re so simple that we can...simple, small particles have quite the outsized impact — and not just on the disease front. Viruses survive...particles. As a bonus, this increases the carrying capacity of the viral vector, increasing both safety and..., just to increase the viral vector’s carrying capacity. In order to allow the viral vectors to reproduce...necessary, genes for the required proteins are packaged in separate plasmids and expressed via cells cultured...
  6. Illuminating Choices: A Guide to Selecting Fluorescent Dyes and Ligands

    Type
    Blog Post
    Published
    March 21, 2024, 1:15 p.m.
    ...realizing it. Yet, this selection is crucial as it will impact downstream outcomes of an experiment, including...Grimm & Lavis, 2022). These variations directly impact the way you can utilize these dyes. The most-used...emission of labeled agonists and antagonists, impacting the interpretation of experimental results. It's...dopamine D2/D3 receptors (Allikalt et al., 2020) Impact of labeling process: The process of dye labeling... on the respective fluorochrome. Brightness is impacted by both the excitation coefficient, characterizing...multiple dyes during analysis. Image resolution is impacted by several factors. Firstly, brighter dyes enable...
  7. Viral Vectors 101: Inverted Terminal Repeats

    Type
    Blog Post
    Published
    Oct. 19, 2023, 1:15 p.m.
    ...expression at varying capacities. AAV vectors containing the AAV2 ITRs can be cross-packaged with capsids from...replication and are required for replication, packaging, and vector persistence. They work in conjunction...in the same DNA molecule as the gene that they package. In a transfer plasmid, the transgene is flanked...Bonnin, D., Merten, O.-W., & Galibert, L. (2017). Impact of Inverted Terminal Repeat Integrity on rAAV8 ...
  8. Expanding the Targeting Scope and Editing Efficiency of Adenine Base Editors

    Type
    Blog Post
    Published
    March 17, 2020, 1:32 p.m.
    ...developed the Phage-Assisted Continuous Evolution (PACE) and Phage-Assisted Non-Continuous Evolution (PANCE...mutations, selection, and replications per day.  The PACE and PANCE systems use M13 bacteriophage, which rely...dilution step represents the major difference between PACE and PANCE: for PANCE the phage progeny is not diluted...-stringency PANCE, followed by higher stringency PACE, resulted in the evolution of TadA variants with...contexts. References Gaudelli NM, Komor AC, Rees HA, Packer MS, Badran AH, Bryson DI, Liu DR (2017) Programmable...
  9. 15 Years of Addgene: The Top 15 Plasmids

    Type
    Blog Post
    Published
    Jan. 8, 2019, 1:54 p.m.
    ...psPAX2  - psPAX2 is a 2nd generation lentiviral packaging plasmid from the Didier Trono lab that expresses...MuLV retroviral particles. It can be used with packaging plasmids such as pCMV-dR8.2 dvpr (lentiviral) ...pCMV-VSV-G. pRSV-Rev - This 3rd generation lentiviral packaging plasmid from the Trono lab contains the rev gene...pMDLg/pRRE - This is a 3rd generation lentiviral packaging plasmid from the Trono lab that contains the gag...-puro contains all the necessary elements for packaging, reverse transcription, and integration needed...
  10. Viral Vectors 101: Viruses as Biological Tools

    Type
    Blog Post
    Published
    March 21, 2023, 1:15 p.m.
    ...Expression Infects Non-Dividing Cells Large Packaging Capacity (>8kb) High Transduction Efficiency Transient...for Mouse Cells and Hematopoietic Cells Low Packaging Capacity (~4.5kb From basic science to clinical...accommodate a cargo up to approximately 8 kb, but viral packaging is less efficient when inserts are on the higher...
  11. CRISPR 101: Multiplex Expression of gRNAs

    Type
    Blog Post
    Published
    Sept. 10, 2020, 11:45 a.m.
    ...nontargeting spacer flanked by two CRISPR repeats. The spacer can be digested using BsaI, allowing a spacer-repeat...using 3 distinct spacer-repeats, you could easily create 7 unique arrays (e.g. for spacers A, B, and C, you... cassettes, making them advantageous for small capacity vectors like AAV. In addition to the mammalian...
  12. Popular Retroviral Vectors and Their Uses in Scientific Research

    Type
    Blog Post
    Published
    July 24, 2018, 12:51 p.m.
    ... systems are made up of separate envelope and packaging plasmids as well as transfer plasmids. This concept...in our Gamma-retrovirus guide and find popular packaging and gamma-retroviral envelope plasmids here. Lentiviral...can be found in our Lentiviral guide. Popular packaging and lentiviral envelope plasmids are listed here...gamma-retroviruses use the same gene products for packaging, however, the isoforms of these proteins, as well...differ. Therefore, lentiviral and gamma-retroviral packaging plasmids are not interchangeable. General envelope...
  13. Illuminating Epigenetics with A FRET Based Biosensor

    Type
    Blog Post
    Published
    Nov. 19, 2015, 3:30 p.m.
    ...in the compacted region and results in a loss of gene expression. In this way, genes in compacted regions... is a complex of DNA and histone proteins that compacts cellular DNA into chromosomes and reduces the ...and tightly bound DNA is to histones, the more compacted it becomes. This prevents the cellular machinery...study epigenetics. This is likely to have huge impacts in the way we study and treat complex or multifactorial...
  14. CRISPR 101: RNA Editing with Cas13

    Type
    Blog Post
    Published
    July 31, 2020, 12:30 p.m.
    ...enzymes prefer targets with a given single base protospacer flanking site (PFS) sequence, but orthologs like...be made when multiple As are present in the gRNA spacer, as ADAR will preferentially edit an adenine if...PspCas13b-ADAR2DD(E488Q) displayed robust editing with various spacer lengths from 30-84 nucleotides, and designated ...they confirmed A->I editing and found that 50 nt spacers increase editing efficiency but also increase off-target...various dRanCas13b truncations that would allow packaging the construct for viral delivery. They found C-terminal...
  15. CRISPR 101: Targeting RNA with Cas13a (C2c2)

    Type
    Blog Post
    Published
    Sept. 21, 2017, 2:07 p.m.
    ...commonly associated with CRISPR arrays and involved in spacer acquisition following infection, as a form of “...is reduced when 2 mismatches are present. The protospacer flanking sequence (PFS) for LshCas13a, which ...sequence for Cas9, is located at the 3’ end of the spacer sequence and consists of a single A, U, or C base...each DNA target have high sequence identity to the spacer sequence and contain the appropriate PAM sequence...cells. LwaCas13a-msfGFP can mediate cleavage with spacers from 20-28 nucleotides in length and does not require...
  16. Avoiding the Dark Side of Fluorescent Protein Fusions with mOX FPs

    Type
    Blog Post
    Published
    Oct. 27, 2015, 3 p.m.
    ...investigators realize too late that they have missed the impact of dark, non-fluorescent, and misfolded FP-fusions...quantitative imaging experiments or even negatively impact cells (see Figure 1). When behaving properly, ... the function of resident ER chaperones and may impact cellular function or possibly viability. FP misfolding.... It remains unclear whether the FP misfolding impacts fusion protein function and this could lead to ...secretory pathway (Figure 2), the inner membrane space of mitochondria and chloroplasts, the extracellular...
  17. March for Science

    Type
    Blog Post
    Published
    April 21, 2017, 2:30 p.m.
    ...aspects of research at National Aeronautics and Space Agency, the Environmental Protection Agency, and...long-term science outreach, may have the most profound impact (15). Diversity and inclusion in science, technology... immigrants, and minorities who have had great impacts on STEM (21–26). Increased scientific funding...communities (something already encouraged by “Broader Impacts” requirements for certain grants) (28). As one ...Science Foundation 15-008: Perspectives on Broader Impacts. The Pipettepen: The March for Science Raises Concerns...
  18. Scientific Reproducibility - Focusing on Solutions at the Minisymposium on Reproducibility

    Type
    Blog Post
    Published
    May 18, 2018, 7:32 p.m.
    ... over-reliance on the perfect story for a “high impact” publication can lead to the publication of rare...experiments on similar subjects in a single, searchable space. Finally there are new publishing outlets like F1000... data even if it isn’t considered immediately impactful. Down the line we may see further adoption of ...criticisms that focus less on perceived novelty and impact. Journals could also begin requiring reproducibility...health of the scientific enterprise and not just impact. Cause #3: Poor experimental design It’s easy to...
  19. Reflections and Looking Ahead

    Type
    Blog Post
    Published
    Feb. 25, 2025, 2:15 p.m.
    ...these milestones remind us of the extraordinary impact that happens when scientists come together to share...more AAV viral vector options, we launched AAV Packaged on Request, a service that dramatically expands... transfer plasmid in our repository can now be packaged on demand in five distinct serotypes, offering...breakthrough enabled brings us closer to making an impact on humanity's greatest challenges. Thank you for...
Showing: 61 - 80 of 445 results