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Showing: 501 - 550 of 954 results

  1. Opto-Nanobodies: Using Light to Manipulate Cell Signaling and Protein Purification

    Type
    Blog Post
    ... protein purification with OptoNBs The first application for OptoNBs takes us in vitro: light-controlled...require a protein to be tagged, which limits these approaches to use with recombinant proteins. Purifying an...OptoNBs to control cell signaling The second application for OptoNBs takes us into cells: light-based ...

  2. Antibodies 101: Isotypes

    Type
    Blog Post
    ... and remove a pathogen. Different isotypes also appear at different stages of an immune response. There... isotype of an antibody so you can select an appropriate isotype control. An isotype control has the same... Isotype controls are used in antibody-based applications including flow cytometry, immunohistochemistry...

  3. Communicating Your Science With Help From ComSciCon

    Type
    Blog Post
    ...interview or whether your receive the next grant you apply for. After all, the only value your work will have... slide, think about whether the same principle applies to other slides in your deck.  If someone asks ...stay tuned to our website and social channels to apply for our future events. In addition to this annual...

  4. Back to Bacteria: CRISPR gRNA Multiplexing Using tRNAs

    Type
    Blog Post
    ...) How many loci can Cas9 modify? To test the application of this system to gRNA multiplexing, Xie et al...multiplexing further illustrates the potential of PTGs. Applications of PTGs The major advantage of the PTG system...multiple gRNAs may be used to target genes with overlapping activity. Multiple gRNAs can also facilitate ...

  5. 3 Challenges in Plant Synthetic Biology

    Type
    Blog Post
    ...associated with molecular plant parts, particularly for applied projects intended for commercialization. Many of...patented, and building our own novel pieces where applicable. We will also be working with open source, transformation...but there are several hazards to navigate when mapping out a new project. We’ve shared some of the concerns...

  6. Will You Be My Mentor? Finding and Asking for Mentoring Support

    Type
    Blog Post
    ... I will describe some of the many ways you can approach finding someone to give you advice and guidance...see someone with a great professional presence, approach them for advice on what makes them that way. Is...organization has a mentoring program, consider tapping into it and helping make it work by being an educated...

  7. Antibodies 101: Conjugation

    Type
    Blog Post
    ...especially if you start to consider clinical applications). But there are a few other classes that we ...proximity ligation, immuno-PCR, and single-cell applications (Hegazy, et al., 2020; Niemeyer, et al., 2007...al., 2015). However, there are certainly other approaches that involve modifying the antibody sequence ...

  8. Viral Vectors 101: An Introduction to AAV

    Type
    Blog Post
    ...experiments. Recombinant AAVs (rAAVs) The primary application of AAV is delivery of genetic cargo to a host...rates for AAVs are generally high enough for this approach to work, although it’s less effective in vivo ... S., et al. “Various AAV Serotypes and Their Applications in Gene Therapy: An Overview.” Cells, 12(5),...

  9. The time and cost required to make a plasmid

    Type
    Blog Post
    ...screens and the more traditional “one at a time” approach. According to his math, it takes five hours of...method is free for you, and many labs are quite happy to share, labs that get high volumes of plasmid ...or changes. Fun fact: Addgene’s high-throughput approach means we virtually always use every single well...

  10. Plasmids 101: The protein expression toolbox

    Type
    Blog Post
    ...permanent control mechanism? Where is the control happening? Is the regulation of an exogenously introduced...times) into the genome. Make sure to choose an appropriate promoter to express your cDNA, depending on the...flavors of activators which can be used with this approach - read more about them on our CRISPRa blog! ...

  11. Giving gRNAs a Facelift - Synthetic and Beyond

    Type
    Blog Post
    ...were developed before CRISPR-Cas9, for use in applications like siRNA and antisense oligonucleotides. Some... after less than a minute of exposure to the appropriate light. The photoactivatable counterpart to this...protocols to get your CRISPR experiment moving. Happy editing! References and Resources References Hendel...

  12. Hot Plasmids - March 2020 - base editors, GEVI, MoClo, and optogenetics

    Type
    Blog Post
    ... changes in neural activity when paired with appropriate fluorescent optics. Existing red fluorescent ...organisms such as E. coli and yeast. Because this approach uses standardized parts, it allows for greater...increasingly been recognized for its biotechnological applications including conversion of CO2 into water and electrical...

  13. Celebrating 15 Years of Scientific Sharing

    Type
    Blog Post
    ... work on our external website appearance and functionality are happening and this strengthens our image...support more new projects. Diversification is happening. The Addgene team will have some fun challenges...

  15. RaPID Detection of RNA-protein Interactions

    Type
    Blog Post
    ...work. APEX2, a faster peroxidase-based labeling approach, is an alternative option but it’s toxic to tissues...subtracted from Ramanathan et al.’s RaPID datasets. Applications of RaPID RaPID sounds like a nifty technique...help answer? Ramanathan et al. outline three applications of RaPID: Discovery. To discover novel RNA-...

  16. dTAG - You're it!

    Type
    Blog Post
    ...proteins is an exciting strategy, it is difficult to apply this technique to oncoproteins that lack selective...that are not possible with traditional genetic approaches. In addition, the dTAG system is versatile and...update with vendor and catalog numbers. As we are happy to share aliquots of dTAG-13 in the meantime, please...

  17. Gendered Innovations: Why Does Sex of the Cell Matter?

    Type
    Blog Post
    ...and Western Europe have taken three strategic approaches to gender equality over the past several decades...Australia worked with stem cells in mice. They appropriately used male and female mice (using both sexes ... the sex of the most commonly used cell lines appearing in American Journal of Physiology-Cell Physiology...

  18. Teaching an Old DOG New Tricks: Controlling Protein Activity with GFP

    Type
    Blog Post
    ... Tang and Cepko were eager to see if they could apply GFP regulation to other types of proteins. They ...systems are easily adaptable to neuroscience applications, including optogenetics, and they should make...Tang note that their scaffold system is likely applicable to many types of proteins. For proteins with ...

  19. Antibodies 101: Stripping and Reprobing Western Blots

    Type
    Blog Post
    ...protein in your sample? Or what if something weird happened during your western and your results look… funky...to probe the blot again, almost like new. This approach preserves your sample and saves you from having...retaining residual antibodies. If you have already applied antibodies and need to dry the membrane for storage...

  20. Plasmids 101: Modular Cloning

    Type
    Blog Post
    ...multigene constructs, through multi-TU assembly,happens via three steps: Level 0: Cloning of basic parts...multi-purpose it can be. Let’s review a list of MoClo applications. Genetic circuits Most things in biology are...phenotype is best described with “it’s complicated.” Applying MoClo Interested in using MoClo? You don’t have...

  22. Split-BioID: An Improved Method for Studying Protein-Protein Interactions

    Type
    Blog Post
    ...biomolecules. They can be part of multiple dynamic and overlapping complexes that have distinct functions. Many .... (2017). Split-BioID a conditional proteomics approach to monitor the composition of spatiotemporally...S., & Varnaitė, R. (2016). Meet the neighbors: Mapping local protein interactomes by proximity‐dependent...

  23. Adeno Associated Virus (AAV) for Cell and Gene Therapy

    Type
    Blog Post
    ..., non-enveloped virus that carries a small, approximately 4.7 kb single stranded genome. AAV belongs to... over a period of 1 to 3 years – the treatment appears to be both safe and effective. Challenges for AAV...trials support the utility of AAV as a broadly applicable gene delivery tool, aspects of AAV biology should...

  24. A Look Back at One Year of Plasmid Sharing for COVID-19 Research

    Type
    Blog Post
    ...more about it on the blog. COVID-19 research is happening fast and we’re glad to join these efforts and ... JM, DiVenere AM, Kuo H-C, Javanmardi K, Le KC, Wrapp D, Lee AG, Liu Y, Chou C-W, Byrne PO, Hjorth CK,...resources on the Addgene blog Learn more about mapping the SARS-CoV-2 - human protein-protein interaction...

  26. Mouse Modeling, Part 2: Breeding and Crossing Mice

    Type
    Blog Post
    ...tail clip, or toe clip) and using PCR with the appropriate primers to detect your targeting vector or gene...your parental mouse should be hemizygous at the appropriate allele. When crossed to a mouse that is homozygous...F1 heterozygotes to each other will generate approximately 1 in 16 mice that harbor homozygous alleles ...

  27. Open Resources and Plasmid Tools For Studying C. elegans

    Type
    Blog Post
    ...Scientists are currently doing this using two approaches: single-cell RNA-sequencing to identify neuronal... 2019. For more information about the aims and approach of CeNGEN, check out their publication.   3’UTRome...that can be used to simulate muscle tissue as it applies to C. elegans locomotion. To see the other resources...

  28. Science communication: 9 Strategies to Get Your Foot in the Door

    Type
    Blog Post
    ...of competitive TED talk – to win the audience’s applause with your performance. When your institute opens...guided tours to show people where the lab magic is happening. 3) Volunteer – Step into science education Do... Blog - Hone your writing skills Take the DIY approach and start a blog. Stellar talents like Ed Yong...

  29. Degrading DNA with Cascade-Cas3

    Type
    Blog Post
    ...Cascade binding and subsequent DNA degradation appears to be conserved. This DNA degradation portion can... portion of DNA using only a single gRNA. Cas3 appears to have fewer off-target alterations, likely due...Mashimo, T. (2022). Genome editing technology and applications with the type I CRISPR system. Gene and Genome...

  30. PRIDICT: Predicting Efficiencies of Prime Editing Guide RNAs

    Type
    Blog Post
    ...machine learning (PRIDICT, PRIDICT2.0).   How to apply PRIDICT in prime editing experiments Prediction ...pegRNA efficiencies with pridict.it. This approach leverages the strengths of PRIDICT/PRIDICT2.0 ... computational biology. His expertise includes applying machine learning techniques to make sense of biology...

  31. Truncated gRNAs for Regulating Gene Expression

    Type
    Blog Post
    ...virtually any genetic locus when complexed with an appropriately designed small RNA, or guide RNA (gRNA). The...expression with truncated gRNAs An alternative approach is to modulate Cas9’s nuclease activity by modifying...engineering parameters via a library-on-library approach." Nature methods 12.9 (2015): 823-826. PubMed ...

  32. 3D Printing Meets CRISPR Cas9

    Type
    Blog Post
    ...of proteins. But they are still flat. To truly appreciate the 3D structure of these proteins, it is necessary...molecular viewing software.   In reality, this rarely happens. But if you ever have an opportunity to read one...invariably say something like “Oh,…I didn’t quite appreciate that….” For example, when Tom Steitz was presented...

  33. Multiplexed Capture of Promoter-enhancer 3D Chromatin Structures Using CRISPR

    Type
    Blog Post
    ... original CAPTURE and CAPTURE 2.0 methods.   Applications of CAPTURE 2.0 CAPTURE 2.0’s increased rate ... of chromatin interaction networks  A second application for CAPTURE 2.0 is the construction of spatial...temporal changes in chromatin interactions A third application for CAPTURE 2.0 is detection of temporal changes...

  34. Tips for a 1st time AAV user (by a Rookie AAV user)

    Type
    Blog Post
    ...Addgene AAV Production protocol, I take a lazier approach for harvesting my AAV. I skip the PEG precipitation...the PEG will separate into two phases. If this happens, the solution can be cooled and the two phases ...immediately before iodixanol purification. This approach gives me a bit of flexibility since I can store...

  35. Hot Plasmids and Viral Preps - May 2021

    Type
    Blog Post
    ...The CRISPR corner New ready-to-use viral preps Mapping antibody escape in SARS-CoV-2 by mutational scanning... sequencing. From Starr et al Cell., 2020. (B) Mapping antibody-escape mutations with the yeast display...specific anti-SARS-CoV-2 antibodies (Fig 1B). This approach can augment viral surveillance by enabling rapid...

  36. Fluorescent Proteins 101: Visualizing Subcellular Structures & Organelles

    Type
    Blog Post
    ... map the internal organization of a cell. This mapping can be done by using antibodies targeted to the...meaningful way it is important to choose the appropriate quantification methods and tools. It is usually...Pages 2. Cooper GM. 2000. The Cell: A Molecular Approach. 2nd Edition. 3.  CureFFI.org. Cell Biology 04...

  37. Plasmids 101: Optimizing Plasmid Yields

    Type
    Blog Post
    ...are, you’ll even have DNA left over for other applications, like PCR, cloning, transfection, or long-term...wash step or use a different strain. For most applications, Addgene uses and recommends DH5𝝰! This strain...your E. coli to ensure it is suitable for your application. We have previously reviewed many common lab ...

  38. PITChing MMEJ as an Alternative Route for Gene Editing

    Type
    Blog Post
    ...(2015). “A Scalable Genome-Editing Based Approach for Mapping Multiprotein Complexes in Human Cells.” ...lies in the diversity of nucleases and their applications. It will be interesting to see what new editing...

  39. Tips for Using BLAST to Verify Plasmids

    Type
    Blog Post
    ...reference sequence into the Subject Sequence box that appears. Aligning two nucleotide sequences is probably ...frameshift mutation present in the ORF is readily apparent when viewing blastx results. When using blastx...webservices/#pairwise_sequence_alignment_psa Happy BLASTing! Do you have any tips for using BLAST to...

  40. Molecular Biology Protocol - Restriction Digest of Plasmid DNA

    Type
    Protocol
    ...of interest (see below for recommend amounts) Appropriate restriction enzyme (see manufacturer's instructions...instructions for proper ammount) Approrpriate restriction digest buffer (see manufacturer's instructions) ...as Addgene's Sequence Analyzer . Determine an appropriate reaction buffer by reading the instructions for...The amount of DNA that you cut depends on your application. A diagnostic digest typically involves ∼500 ...volume usually varies from 10-50 µL depending on application and is largely determined by the volume of DNA...better. Mix gently by pipetting. Incubate tube at appropriate temperature (usually 37 °C) for 1 hour. Always...manufacturer’s instructions. Pro-Tip Depending on the application and the amount of DNA in the reaction, incubation...

  41. Immunocytochemistry

    Type
    Protocol
    ...PBS, remove the wash, and dispose of it in an appropriate waste container. Fix each well with 500 µL of...as methanol or acetone may be better for some applications. Remove the paraformaldehyde and follow your...safety guidelines for disposing of waste in the appropriate container. Wash 3x for 5 min in 500 µL PBS on...permeabilization buffer and dispose of it in an appropriate waste container. Wash 3x for 5 min in 500 µL ... the blocking buffer and dispose of it in an appropriate waste container. Dilute the primary antibody ...the primary antibody and dispose of it in an appropriate waste container. Wash 3x for 5 min in 500 µL ...min at RT in the dark. Pro-Tip The plate can be wrapped in foil to block light. Remove the secondary antibody...

  42. An Introduction to Adenovirus

    Type
    Blog Post
    ...which a vaccine is available. However, here it appears that the culprit for these unusual cases was either... the removal of certain adenoviral genes that apparently contribute to virulence (Tollefson et al., 1996...on the Addgene blog Viral Vectors 101: Viral Applications Adenoviral Vector Production and Troubleshooting...

  43. Plasmids 101: Secondary Nanobody Toolbox

    Type
    Blog Post
    ..., Alexa Fluor 568, or Alexa Fluor 647 before application to the sample. Staining with this multi-color...Mouse IgG2a TP1129 pTP1005 (3x cysteines) Mouse Kappa TP1170 pTP1174 (1x cysteine) pTP1172 (3x cysteines...labeling for super-resolution imaging, rapid epitope-mapping and native protein complex isolation. eLife. PubMed...

  44. Capturing a Moment with Marc Zimmer’s “The State of Science”

    Type
    Blog Post
    ...What the Future Holds and the Scientists Making It Happen, is an exercise in restraint. The very first subheading... primarily on fluorescent proteins and their applications, tackles much broader issues in this brief volume...ago I would have nodded my head knowingly and appreciatively throughout this chapter. Now, these observations...

  45. A Guide to Starting Your Own Journal Club

    Type
    Blog Post
    ...the most important is letting people know it’s happening. Aim for 3-4 weeks advance notice for the first...the Addgene bioinformatics journal club! What happens during journal club? There are many common ways....  These variations are suited for different applications and should be carefully chosen for each group...

  46. Tips for arabidopsis transformation

    Type
    Blog Post
    ...Addgene  Choosing an expression system Choosing an appropriate expression vector is the first step in generating...binary gateway vectors and can be used for promoter swapping and generating N and C terminally tagged fusion...phenotypes. For most phenotypic analysis it is appropriate to begin working in the T2 generation. The selection...

  48. Summer SciComm Series: Modes of Communication

    Type
    Blog Post
    ... or burn yourself out trying to slog through unappealing work in your precious free time.  And don’t be...- will be required to produce an outcome you’re happy with. Know if you’ll need specialized equipment ...then pick whichever is most accessible or most appealing to you. And if you’re not sure what all the possibilities...

  49. AAVs CREATed for Gene Delivery to the CNS and PNS

    Type
    Blog Post
    ... an ideal way to deliver AAV to the PNS. It’s a happy accident that AAV.PHP.S targets the PNS since it...jumble of fluorescent neurons. A simple but flawed approach to multi-color labeling is to inject a mix of ...morphologic studies), as well as translational applications (mechanistic studies and gene therapy treatments...

  50. Plasmids 101: Colony PCR

    Type
    Blog Post
    ...primers. Find Empty Backbones at Addgene Each approach has advantages and drawbacks, which are summarized...which method you choose, make sure to use the appropriate antibiotic for selection.   Lysing bacteria...to determine their size. Make sure to use an appropriate molecular weight standard for reference and to...
Showing: 501 - 550 of 954 results