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  1. Delivery Methods for Generating iPSCs

    Type
    Blog Post
    ...nondividing cells and have an ~8kb packaging capacity. With this packaging capacity, reprogramming factors can...other delivery methods. Retrovirus has a cloning capacity of ~8 kb, so either a single polycistronic vector...or multiple single-gene vectors can be used to package reprogramming factors. An important milestone of...and nondividing cells and have a larger cloning capacity (8-10 kb) than other retroviral vectors. This ...a vector and chromosomal DNA. PB has a cloning capacity of ~9-14 kb. This system is transfected into cells...simple and fast to evaluate. iPSCs should form compact colonies that are comprised of cells with a large...differentiated in vitro to form embryoid bodies which are compact balls of loosely organized tissues that express...
  2. What's New in CRISPR - November 2021

    Type
    Blog Post
    ...system is that it is too large to be effectively packaged into AAV particles for delivery into mammalian... much smaller and would be ideal for such AAV packaging, but their activity in mammalian systems has been... based systems, making it well suited for AAV packaging. Most importantly, this CasMINI system was shown...CasMINI plasmids Efficient CRISPR editing with a hypercompact Cas12f1 and engineered guide RNAs Yong-Sam Kim...result is a highly efficient Cas system with very compact genome editors and a gRNA down-sized by almost ...specifically binds its own mRNA to facilitate its packaging into virus-like particles. Feng Zhang’s lab adapted...the native PEG10 RNA sequences to instead drive packaging of cargo sequences in the capsid, in an approach...
  3. Retrograde AAV viral preps

    Type
    Collection
    ... Viral Vector Packaging Service AAV Retrograde AAV Viral Vector Packaging Service: Retrograde AAV...Berkeley). Don’t See What You’re Looking For? Our Packaged on Request service offers you even more options...Please note this does not guarantee viral vector packaging service, but lets us know what viruses would be...
  4. The Effect of COVID-19 on Liu Lab Plasmid Requests From Addgene Data

    Type
    Blog Post
    ... across regions, with Europe most impacted and China least impacted. The inferred weekend effect is, in...date range is, they could be the most impacted or least impacted. These results highlight the instability... last six months, COVID-19 has had a tremendous impact on our world -- as of June 4, 2020, COVID-19 has...unique PIs/labs placing orders per day) on dates impacted by each effect. The inferred parameters suggest...methods for fundamental scientific discovery and high-impact applications.       Alvin Hsu is a graduate student...next-generation therapeutics. Prime editing, base editing, PACE, and DNA-templated synthesis are four examples of...
  5. Viral Genome Sequencing - A One Stop Shop for AAV Identity and Serotype Confirmation

    Type
    Blog Post
    ...amount of spurious DNA from the packaging cell line, helper and packaging plasmids. We decided to use this... genome exists as [+] and [-] strands that are packaged at the same frequency, we reasoned that, following...viral genome sequencing to determine serotype AAV packaging is not perfect and while we think of the AAV vector...not require any additional reagents or lab work (Pacouret, 2017). Moreover, the sequencing data from multiple...Method for Rapid and Inexpensive Validation of Packaged Single-Stranded Adeno-Associated Viral Genomes...195–205 . https://doi.org/10.1089/hgtb.2019.110 Pacouret S, Bouzelha M, Shelke R, Andres-Mateos E, Xiao...
  6. CRISPR 101: Cytosine and Adenine Base Editors

    Type
    Blog Post
    ..., ABE8s resulted in 1.5-fold more editing at protospacer positions A5-A7 and 3.2-fold more editing at ...to ABE7.10. ABE8s have an improved base editing capacity, even at sites previously difficult to target....Joung’s lab created a dual-deaminase editor called SPACE (synchronous programmable adenine and cytosine editor...and adenine base editors Grünewald et al., 2020 SPACE   Fused cytosine and adenine base editors Walton...01532-7 Gaudelli, N. M., Komor, A. C., Rees, H. A., Packer, M. S., Badran, A. H., Bryson, D. I., & Liu, D.... J. M., Lee, S.-J., Liquori, A. J., Murray, R., Packer, M. S., Rinaldi, C., Slaymaker, I. M., Yen, J.,...020-0535-y Kim, Y. B., Komor, A. C., Levy, J. M., Packer, M. S., Zhao, K. T., & Liu, D. R. (2017). Increasing...
  7. Important Considerations When Using AAVs

    Type
    Blog Post
    ...Richard J. Samulski. "Packaging capacity of adeno-associated virus serotypes: impact of larger genomes on...cells of interest. Although they have a small packaging capacity, AAV vectors were suitable for our needs ...recombinant adeno-associated viral vectors: packaging capacity and the role of rep proteins in vector purity...bleach solution should be used to clean AAVs from workspaces. Speed: AAV transduction experiments are ...
  8. Viral Vectors 101: An Introduction to AAV

    Type
    Blog Post
    ...AAV components      Cargo capacity Empty rAAV has a cargo capacity of ~ 4.7 kb, meaning that your... is a single stranded, Parvoviridae DNA virus, packaged in a non-enveloped icosahedral capsid, that can...in recombinant AAVs (rAAVs) with maximum “trunk” space for genetic cargo. Typically, when researchers speak...the type of capsid (outer protein shell) used to package an rAAV vector; these capsids allow the virus to...design single rAAV vectors with multiple genes packaged in them and use elements such as IRES or 2A to...rescued from the vector plasmid and individually packaged into the AAV capsids. As a genome conversion in...
  9. Biosensor AAV Preps

    Type
    Collection
    ... Viral Vector Packaging Service AAV Biosensors Viral Vector Packaging Service: Biosensor AAV ... Page . Don’t See What You’re Looking For? Our Packaged on Request service offers you even more options...Please note this does not guarantee viral vector packaging service, but lets us know what viruses would be...
  10. Western Blot

    Type
    Protocol
    ...gel as follows: Remove the gel from the plastic packaging. Remove tape and plastic comb. Rinse the wells...
  11. #DeckTheLab with Tinsel and Test Tubes, Fa La La La La La La La La

    Type
    Blog Post
    ...simply embellish and adorn your lab space or your work from home space in a fun, festive holiday or winter...selected as a winner, you’ll receive a winter care package from Addgene.  Here are the details:   Contest...winter or holiday theme decor in your work from home space… but with a science twist. Maybe you have a collection...using life science catalog pages. Make your WFH space feel a little more festive this holiday season! ...Instagram as we share pictures of our decked out spaces.       ...
  12. CRISPR-mediated Plant Base Editors

    Type
    Blog Post
    ...based on the location of the ‘A’ relative to the protospacer adjacent motif (PAM). ABE7.10 can edit target...'A' if it lies in a small genomic window: at protospacer position 4-8 counting the ‘NGG’ PAM as 21-23 ...closer to the PAM, i.e., positioned at 8-10 in protospacer, ABE6.3 or ABE7.9 are better suited (Gaudelli...two Bsa1 sites to clone the single guide RNA (protospacer+scaffold) in a pol-III (OsU3) promoter driven...tRNA-gRNA (PTG) gene system to clone multiple protospacers which enables us to target more than one genomic...placed in 2-6 bp and 4-8 bp, respectively, of the protospacer. And if the target cytosine is closer to the ...depending on the location of your target base in the protospacer sequence. If you do not find a suitable ‘NGG’...
  13. IDP and your PI: A Roadmap for Career Planning and Personal Development

    Type
    Blog Post
    ... Angela DePace has put personal development at the center of her lab (pictured above). DePace holds yearly...through thoughtful planning and honest feedback DePace’s yearly planning meetings revolve around two simple...tone of the meeting is almost more important. As DePace says, science is full of “terrible perfectionists...have tangible benefits for both PI and trainee. DePace and her lab members have noticed that the meetings... Park J, Bragdon MD, Lopez Rivera F, Biette KM, DePace AH. Mol Cell. 2015 Jun 4;58(5):718-21. doi: 10.1016...
  14. Viral Vectors 101: Parts of the AAV Transfer Plasmid

    Type
    Blog Post
    ...start making AAV:  the packaging plasmid which contains the structural and packaging genes, the adenoviral... what gets packaged into the AAV molecule. What’s outside of the ITRs does not get packaged in the AAV...AAV vector. The cloning capacity between the ITRs is ~4.4 kb. ITRs are inherently unstable due to their...propagation, with complete ITR loss abolishing AAV packaging. To prevent ITR loss, it’s best to propagate AAV...
  15. Adenovirus Plasmids

    Type
    Collection
    ...adenoviruses in research include their large packaging capacity (>8 kb), high titers, and high levels of ...molecule can then be transfected into mammalian packaging cell lines to generate adenovirus particles. Read...
  16. A History of Genome Engineering in Popular Culture

    Type
    Blog Post
    ... authors were exploring were space and robots. Warping to stars in space ships and the rise of killer ...How has scientific progress in genetic editing impacted the world of fiction and vice versa? We draw a...Into Darkness (2013) which is the remake of the space-melodrama Star Trek II: The Wrath of Khan (1982)... combined the worlds of genetic engineering and space travels. The movie sees the USS Enterprise crew ...science.1258096 Gaudelli NM, Komor AC, Rees HA, Packer MS, Badran AH, Bryson DI, Liu DR (2018) Publisher...//doi.org/10.1085/jgp.36.1.39 Komor AC, Kim YB, Packer MS, Zuris JA, Liu DR (2016) Programmable editing...
  17. New and Upcoming Viral Vectors - September 2019

    Type
    Blog Post
    ...understanding how this molecule impacts neuronal circuits. We recently packaged a constitutive GABA sensor ...are small (20 ul) samples of EGFP-expressing AAV packaged in various serotypes. This collection is now complete... these vectors to more serotypes. We currently package four variants of these biosensors, which are optimized...for manipulating specific neurons. We recently packaged a soma-targeted opsin from Christopher Harvey’...Viral vectors coming soon! These vectors should be packaged and available as AAV in the next few months. Email...
  18. New England Biolabs Cell-Imaging Plasmid Collection

    Type
    Collection
    ... 101131 pACP-GPI Control Plasmid ACP/MCP-tag Control for cell surface localization 101128 pACP-ADRβ2 Control...backbone for transient mammalian expression 101126 pACP-tag (m)- 2 Vector ACP/MCP-tag Empty backbone for...
  19. Viral Vectors 101: Types of viruses

    Type
    Blog Post
    ... from. Lentiviruses have slightly larger packaging capacities than gamma-retrovirus, coming in around ... viruses are roomy: some adenoviruses pack up to ~35 kb of space for cargo! Adenovirus is an effective... cargo into a cell. These viruses have a cargo capacity of ~ 8 kb, ample room for most experimental needs...direct application of virus. However, the cargo capacity of AAV is ~4.7 kb, almost half that of lenti and...
  20. A New Generation of Adenine Base Editors Improves Editing in Primary Human Cells

    Type
    Blog Post
    ... Depending on the position in the protospacer, the editing capacity of the ABE8s ranged from 1.5x higher...site in the genomic DNA to contain a specific protospacer adjacent motif (PAM) made up of 5′-NGG-3′ (“N...ABE8s demonstrate an overall improved base editing capacity, even at sites that used to be difficult to target....  References Gaudelli NM, Komor AC, Rees HA, Packer MS, Badran AH, Bryson DI, Liu DR (2017) Programmable...Edwards A, Gehrke JM, Lee S-J, Liquori AJ, Murray R, Packer MS, Rinaldi C, Slaymaker IM, Yen J, Young LE, Ciaramella...
  21. Kit Free RNA Extraction

    Type
    Protocol
    ...hazards for these reagents. Work in a well-ventilated space and under a fume hood when working with the volatile...
  22. AAV Vector Quality Control: Going the Extra Mile with NGS

    Type
    Blog Post
    ...sequence all the DNA packaged inside the viral particles (Figure 1). Briefly, packaged DNA is extracted from... the helper plasmids or the cell genome can be packaged inside the vectors during production. These impurities... to determine the identity and serotype of the packaged DNA and look for potential contaminants. The ...mentioned earlier, it is common to find DNA from the packaging cell genome, bacterial genomes, cloning vectors...the recombinase for transgene expression. Once packaged in AAV, this pre-recombined DNA could lead to ...
  23. Viral Vectors 101: The Retroviral Lifecycle

    Type
    Blog Post
    ...the genetic code for reverse transcriptase are packaged (Wu et al., 1997) inside of the capsid . This ...the vector particle, some of the RT protein gets packaged inside of the vector particle, along with its ...-type viral genome can direct the production, packaging, and release of progeny viral particles. And there...4355596 King, S. R., Duggal, N. K., Ndongmo, C. B., Pacut, C., & Telesnitsky, A. (2008). Pseudodiploid Genome... Temin, H. M. (1990). Genetic consequences of packaging two RNA genomes in one retroviral particle: pseudodiploidy...mouse embryo cell lines in which each cell has the capacity to be activated to produce infectious murine leukemia...
  24. CRISPR Between the Genes: How to Experiment with Enhancers and Epigenomics

    Type
    Blog Post
    ...action at a distance.” Through the marvel of DNA compaction, an enhancer can increase the expression of a...millions of base pairs away. (For details on DNA compaction and the structural proteins that make it possible...details. DNA is a 3D Fractal Figure 2: DNA compaction. Graphics courtesy of beyondthedish (left) and...tertiary structures (globules) to achieve exquisite compaction—on the order of 700 terabytes per gram—and form...chromosomes we all know and love. To understand compaction, suppose you have a piece string that’s 10 meters..., are mere millimeters apart. Similarly, cells compact DNA in a way that brings linearly distant regions...
  25. Healthcare Consulting: A Door to the Business of Life Sciences

    Type
    Blog Post
    ...Gairik Sachdeva. Healthcare consulting is a fast-paced field, requiring people who are willing to quickly...uncertainties and a rapidly evolving healthcare space. The consultants who enjoy their jobs most, get ...typically cutting edge; a consultant might outline the impacts of combining targeted molecular therapies for cancer...consulting can sometimes be challenging. The fast paced nature of projects often means working long hours...more. Essentially any role in the broad healthcare space that can benefit from the blend of business and ...interested in the business of life sciences and it's impact on human health.     Resources on the Addgene Blog...
  26. Hot Plasmids Spring 2024

    Type
    Blog Post
    ...single-strand AAV (ssAAV). To maintain the packaging capacity and improve the specificity of ssAAV, a targeting...CRISPRi screen to identify additional host factors impacting prime editing and found the protein La (a small...proteins and a critical component for viral genome packaging. Addgene recommends both for use in western blots...that was more desirable than having many closely-packed labeled cells. Plus, Voltron2’s fluorescence is...vectors for microglia was further enhanced by packaging the virus as self-complementary AAV (scAAV). However...
Showing: 91 - 120 of 556 results