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Showing: 481 - 500 of 902 results

  1. Educational Planarian Tools for Teaching Developmental Biology Techniques

    Type
    Blog Post
    Published
    May 24, 2018, 1:20 p.m.
    ... creatures commonly found in freshwater ponds, provide a good potential solution to this problem. Planarians...companion resource called “cutting class” which provides more detailed materials and protocol resources...synthetically made RNA (riboprobes) with modified nucleotides (for example, Digoxigenin-labelled Uracil) that...dsRNA feedings. Some of the phenotypes are not evident until after amputation. For example, the dramatic...odf2 gene knockdown results in an observable “sidewinder” phenotype that disrupts wildtype locomotion....dsRNAs into PR-T4P. The Sánchez lab protocol also provides step-by-step instructions for the “the bravest...

  2. Hot Plasmids May 2018 - Optogenetics, Decaffeination, Biosensors, and Fluorescent Protein Tools

    Type
    Blog Post
    Published
    May 15, 2018, 12:43 p.m.
    ...through our hot plasmids articles. These articles provide brief summaries of recent plasmid deposits and ..., CRY2clust, was created by adding a 9-residue peptide to the C-terminus of human codon-optimized  cryptochrome...conditions. With its additional 9 amino acid peptide, the CRY2clust domain enables fast and reversible...original version containing CRY2 without the extra peptide. CRY2clust should prove a useful tool to further...supplied in the media, these bacteria are unable to divide. However, if fueled with caffeine and equipped ...Dronpa flanked a PKA substrate fused to the phosphopeptide binding domain FHA. The FHA1 domain binds to...

  3. CRISPR 101: Targeting Non-Coding RNAs with CRISPR/Cas9

    Type
    Blog Post
    Published
    Nov. 14, 2024, 2:15 p.m.
    ...that are around 20 base pairs long. Using a single guide RNA (sgRNA) to create a double-strand break works...non-coding RNAs (lncRNA). lncRNAs are over 200 nucleotides in length and lack an open reading frame, so ... a number of different options. By carefully considering your ncRNA of interest, you should be able to...references Resources on addgene.org Addgene's CRISPR Guide Addgene's CRISPR 101 eBook CRISPR resources More...Doudna JA, Charpentier E. A Programmable Dual-RNA–Guided DNA Endonuclease in Adaptive Bacterial Immunity...051410-092902 Liu Y, Cao Z, Wang Y, et al. Genome-wide screening for functional long noncoding RNAs in ...

  4. Plasmids 101: Modular Cloning

    Type
    Blog Post
    Published
    March 12, 2024, 1:15 p.m.
    ...given peptide can easily be tested by generating Level 1 TUs with unique promoters, and the ideal phosphatase...behave in a cell. For unpredictable cases, MoClo provides two answers: first, sets of parts with characterized...for more complex CRISPR experiments (e.g., many guides/parts delivered) in certain model organisms. In...combinations of different candidate genes at once to identify the best cocktail of genes when the relationship...Resources on Addgene.org Addgene’s Modular Cloning Guide EcoFlex MoClo Kit CIDAR MoClo Kit MoClo Plant Parts...

  5. Engaging with science and society at pgEd

    Type
    Blog Post
    Published
    Sept. 20, 2018, 12:17 p.m.
    ... religious affiliation, and ethnic or personal identity. We do this through a variety of activities, including...experiment, the case of Henrietta Lacks, the Havasupai incident, and the sterilization of women in marginalized...with different organizations and individuals, to identify ways of collaborating, and to organize events ...Having a broad interest and awareness of issues outside of your field of research will allow you to better...better engage these diverse audiences and to identify issues or topics that are matters of concern for ... future work in these areas, and in helping you decide whether you enjoy this kind of work. It is also...

  6. Corralling and Cornering the Goldilocks Antibody

    Type
    Blog Post
    Published
    Aug. 9, 2022, 1:15 p.m.
    ...scientists’ pockets. They allow researchers to identify and isolate very specific biological targets. ...can then be used by thousands of scientists to confidently choose reliable and consistent antibodies for...antibodies, creating a potentially unlimited supply of identical antibodies (See Fig 1.). rAbs are a relatively...collaborates with these companies to create and provide general availability of their recombinant antibodies...creating a database for goldilocks antibodies and, alongside that, a publicly available 2D/3D mouse atlas from...atlas will enable scientists to have an intuitive guide for checking their staining and neuroanatomy without...

  7. Plasmids 101: FLEx Vectors

    Type
    Blog Post
    Published
    April 28, 2016, 2:30 p.m.
    ...using either loxP or lox511 sites, leaving two identical sites on one end of the DNA fragment (Figure 1...recombination event then excises the DNA between the identical loxP or lox511 sites (Figure 1, bottom). Since...only one loxP and lox511 site will remain on either side of the DNA fragment, any additional recombination...genetics, FLEx is currently being used to study a wide variety of in vivo conditional gene rescue experiments... silent until a cell or tissue-specific Cre is provided. Since the FLEx switch ensures Cre-dependent reporter...inverse Orientation), FLEx systems are generally considered "Cre-On" meaning that your gene of interest starts...

  8. Illuminating Epigenetics with A FRET Based Biosensor

    Type
    Blog Post
    Published
    Nov. 19, 2015, 3:30 p.m.
    ... of the DNA with a high frequency of C and G nucleotides). The conversion of cytosine to 5-methylcytosine... to study epigenetics Epigenetic research uses a wide range of molecular biologic techniques to further...enzyme digestion, DNA adenine methyltransferase identification, and bisulfite sequencing. However none of ...consists of one substrate (the histone-derived peptide) which can localise the construct specifically ..., which binds selectively to lysine-methylated peptides. This construct is in the middle of a FRET pair...When methylation occurs at the histone-derived peptide, the methyllysine binding domain causes a structural...

  9. Plasmids 101: Knockout/Knock-In Plasmids

    Type
    Blog Post
    Published
    Dec. 1, 2016, 3:30 p.m.
    ...breaks, in which nucleotide sequences are exchanged between two similar or identical molecules of DNA....homology to the locus of interest. To give you an idea of the process, we’ll walk through an experiment... gene have been cloned into the vector on either side of an antibiotic resistance gene. To avoid selecting...HSV thymidine kinase (HSV-tk) is included just outside one of the homology arms. When we select cells ...creating knockout animals or cell lines, please consider sharing them by depositing with Addgene! Figures...

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

    Type
    Blog Post
    Published
    July 2, 2020, 12:40 p.m.
    ...While “pictures” generated with current 3C methods provide useful information about chromatin interactions...streptavidin IP. Biotinylated dCas9 goes along for the ride throughout all of these steps, until its connection...off-target sites. Long-range chromatin interactions identified with the multiplexed CAPTURE 2.0 largely replicated...replicated interactions previously identified with the original CAPTURE method. Both CAPTURE methods outperformed...both the number of unique chromatin interactions identified and the level of on-target enrichment. 2. Determining...on Your CRISPR Background with Addgene’s CRISPR Guide Page ...

  11. Chromoproteins: Colorful Proteins For Molecular Biology Experiments

    Type
    Blog Post
    Published
    Feb. 4, 2020, 2:15 p.m.
    ...fluorescent proteins and luminescence have been widely used in biological research for a long time, chromoproteins... give colors in ambient light. In contrast, the widely used green fluorescent protein (GFP) gives a bright...early 2000s, a handful of chromoproteins were identified in sea anemone (Chan et al., 2006). Why do these... sequencing are more definitive, but visual identification is a good place to start before taking on more...could get around this problem. There is no single “ideal” chromoprotein plasmid that combines the most desirable...is an orange light-absorbing chromoprotein that Hideji Murakoshi’s lab developed as an acceptor for fluorescence...

  12. Antibodies 101: Producing Recombinant Antibodies

    Type
    Blog Post
    Published
    Aug. 13, 2024, 1:15 p.m.
    ... Protocol Addgene's Video Antibody Purification Protocol Addgene's Antibody Guide References Trimmer JS...the periplasmic space to be oxidized and form disulfide bonds (Frenzel et. al., 2013). If you’re using...stained, the heavy and light chains become visible alongside your ladder and a protein standard. The density...calculated using imaging software. Any bands on the gel beside the heavy and light chains can also be measured...multiple contaminating bands or a few strong ones, consider increasing the number of washes performed during...

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

    Type
    Blog Post
    Published
    Sept. 28, 2017, 2:01 p.m.
    ...an IV injection is an ideal way to deliver AAV to the PNS. It’s a happy accident that AAV.PHP.S targets...barrier - only those that cross the barrier can be identified by PCR later. The PNS presents a different problem...Cre-dependent selection yields AAV variants for widespread gene transfer to the adult brain. Nature biotechnology...Additional Resources on the Addgene Blog Important considerations when using AAVs Learn more about using AAV ...Vectors to use with your research. Visit Our AAV Guide Page for info on AAV components, common uses of ...

  14. AAVs in Retinal Gene Therapy

    Type
    Blog Post
    Published
    July 31, 2018, 12:55 p.m.
    ...was in its infancy, but the eye was identified early on as an ideal target. It is an easily accessible ... time advances in human genetics led to the identification of several disease-causing genes, including...However, AdV was abandoned early on due to its considerable immunogenicity and its transient expression....have broad tropism in the eye. AAV-2, the first identified serotype and the one used in Luxturna™, can efficiently...therapies is impressive: clinical trials for choroideremia, X-linked retinitis pigmentosa, achromatopsia...

  15. Deep Dive: Fixing and Permeabilizing for Immunofluorescence

    Type
    Blog Post
    Published
    Aug. 30, 2022, 1:15 p.m.
    ...method into six general steps and outlined the considerations to be made during each step. Now that you know...take a slightly deeper dive into those steps and provide you with more details to help you plan and optimize.... If your target is already on the extracellular side of the membrane, then this step may not be necessary...binding to any target protein that is still on the inside of the cell. However, assuming you do need to permeabilize... of fixatives or permeabilizers, but how do you decide which ones to use? Here are some tips for making... then optimizing from there is a good option.  Consider your target - if you are studying a membrane protein...

  16. Don’t FRET: Bimolecular Fluorescence Complementation Makes Visualizing Protein-Protein Interactions Easy

    Type
    Blog Post
    Published
    Aug. 27, 2020, 1:15 p.m.
    ...validated for BiFC (Kodama and Hu, 2012). Having a rough idea of how your PIPs might interact will allow you to...each PIP and empirically test which combination provides the best fluorescent signal. As for linker sequences...experiments. In either case, overexpression should be avoided because it can generate high background fluorescence...critical to the success of BiFC experiments. The ideal control is a mutated variant of one or both of your...that you empirically test a number of mutants to identify those that inhibit BiFC in your cellular system...endogenous PIPs is expressed at increasing levels alongside your BiFC constructs. If your PIPs actually interact...

  17. Minigenomes - a Safe Way to Study Dangerous Viruses Like the Ebola Virus

    Type
    Blog Post
    Published
    March 17, 2016, 2:30 p.m.
    ...Vector Plasmids Read Our Lentiviral Vector Guide Read Our AAV Guide  ...the cell when the appropriate viral proteins are provided in trans (see Other Important Components of EBOV...separate plasmids and are co-transfected into cells alongside a plasmid encoding the minigenome. These genes...The power of reverse genetics. Springer Berlin Heidelberg, 2004. 1-41. PubMed PMID:15298166. 3. Hoenen,...Posts on Viral Vectors Check out Our Scientist's Guide to Ebola Contribute to the Addgene Blog Resources...

  18. The Importance of a Fun Workplace: Company Culture at Addgene

    Type
    Blog Post
    Published
    Sept. 3, 2015, 2:30 p.m.
    ...mission by hard work, we genuinely enjoy each other’s ideas and company. The Addgene summer picnic This past...though she generously offered. Instead we picniced outside of our new office space on the nicely manicured...together is that when it’s time for fun, everyone is confident that their teammates and project collaborators...events over the years. To keep the organizational side of things from taking too much of your time, scroll...(or more popularly- cookies). 3. Do something outside of your ordinary environment Team building events...something fun happening! Addgene actually has chimes outside of our break room. A ring of the chimes means something...

  19. Hot Plasmids - November 2023

    Type
    Blog Post
    Published
    Nov. 14, 2023, 3:35 a.m.
    ...with no additional off-target edits, making them ideal for size-limited AAV delivery. PE6c and PE6d are...modalities and has the potential to reduce negative side effects. This platform offers a promising approach... TransitID By Mike Lacy Proximity labeling can identify protein interactions or map a local proteome, ...dual-enrichment and mass spectrometry workflow identifies proteins bearing both labels (which had therefore...locations. C) Enrichment of dual-labeled proteins identifies proteins that had been trafficked from the “source...bioRxiv, under CC-BY-NC 4.0 license. This system provides a unique new way to record and quantify the dynamics...

  20. Bacterial Toxin-antitoxin Systems as Molecular Biology Tools

    Type
    Blog Post
    Published
    Nov. 1, 2018, 12:35 p.m.
    ...substances are part of toxin-antitoxin systems that are widely present in bacteria. They consist of a toxin which...systems have been used as biological tools for a wide range of applications in molecular biology or in...Applications of ccdB in plasmid cloning Perhaps the most widely used application of CcdB is GatewayTM cloning, ...toxin-antitoxin systems and their applications MazE/MazF Aside from CcdB/CcdA, there are many protein-based toxin-antitoxin... endonucleases cleave DNA at or near specific nucleotide sequences. To counter this, methyltransferases...methyltransferases add methyl groups to bases at specific nucleotide sequences, preventing the cognate restriction enzyme...
Showing: 481 - 500 of 902 results