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We narrowed to 712 results for: Met

Showing: 121 - 140 of 712 results

  1. Antibodies 101: Introduction to Immunofluorescence

    Type
    Blog Post
    Published
    Nov. 16, 2021, 2:15 p.m.
    ...There are multiple methods for fixing samples, each with its own pros and cons. The method you use will depend...To narrow down which specific methods to use, start by reading the methods sections of papers that have...validation of antibodies. Nat Methods 13:823–827. https://doi.org/10.1038/nmeth.3995 Additional Resources ... to assays using non-fluorescent visualization methods. Stay tuned for a future blog post to learn more...will be able to image them in the end. Again, the methods you use will depend on target and sample type. ... fluorescence and to capture your results. The methods used depend on the sample type, microscopy tools...to Performing Immunofluorescence Staining. In: Methods in Molecular Biology. Springer New York, pp 299...

  2. Antibodies 101: Beyond Surface Labeling

    Type
    Blog Post
    Published
    June 27, 2024, 1:15 p.m.
    ...comes to labeling cells for flow cytometric analysis, the most common method is a cell surface label, where...single-fluorophore-conjugated antibodies. These methods can include labeling markers with multiple proteins... cannot be used, you may want to look at other methods. In the above cases, a good alternative is using... used in western blotting or ELISAs.  A popular method for indirect labeling employs a primary epitope-targeting...the cells that are not labeled. An easy and quick method of negatively selecting your cells of interest .... The main applications of dye stains in flow cytometry are cell proliferation and cell viability. Unlike...(histogram) flow plot (Figure 4b). Through this method, differences in proliferation between cell populations...

  3. Proximity Labeling: A Powerful Tool for Protein Complex Purification and Proteomic Mapping

    Type
    Blog Post
    Published
    Dec. 2, 2019, 2 p.m.
    ... and mass spectrometry approaches. Recently however, scientists have developed newer methods termed proximity-based...antibody based affinity purification/mass spectrometry methods.  BioID: a promiscuous biotin ligase that...purified using streptavidin and separated via flow cytometry.  Find plasmids for EXCELL here! Since BioID was...your favorite protein or RNA motif, give these methods a try.  References:  Branon, Tess C., et al. ...Khavari. "Research Techniques Made Simple: Emerging Methods to Elucidate Protein Interactions through Spatial...electron microscopy and proximity labeling." Nature methods 12.1 (2015): 51. PubMed PMID: 25419960. PubMed ...interaction detection in living cells." Nature methods 15.3 (2018): 207. PubMed PMID: 29400715. PubMed...

  4. Visualizing Protein Turnover In Situ

    Type
    Blog Post
    Published
    Jan. 16, 2018, 3:20 p.m.
    ...normal neuronal context. In other words, I needed a method for visualizing protein turnover in situ in neurons... come with health risks. Importantly, with this method it is not possible to follow turnover of individual...overexpression may interfere with the system. Another method for studying protein synthesis in situ is the knock-in... FUNCAT Professor Schuman’s technique applies metabolic labeling using a noncanonical amino acid, azidohomoalanine...incorporated into newly synthesized proteins instead of methionine. The labeled proteins can be detected using click-chemistry...originally published by the Söderberg lab in Sweden as a method for the visualization of protein-protein interactions... later visualized by FUNCAT-PLA. Before these methods were combined, it was not possible to visualize...

  5. 28 Hot Plasmid Technologies from 2015

    Type
    Blog Post
    Published
    Dec. 23, 2015, 3:30 p.m.
    ...pMemoryArray.   Yang et al., Nat Methods 2014 Dec;11(12):1261-6. doi: 10.1038/nmeth.3147. Bioluminescent pH ...al., Nat Methods 2012. Mar 11;9(5):493-8. MXS cloning platform for imaging and flow cytometry applications...Analogous to modular assembly methods, such as BioBricks, the MXS-chaining method uses specified restriction...Addgene. Hochbaum, et al. Nat Methods. 2014. Kralj, et al. Nat Methods. 2011. High-throughput luciferase...Molecular Biology. 2013 August 20th; 14(1). TRICK: A method for visualizing the first round of translation ...and cancer-associated chromosome shattering. This method is based on the recognition of genomic loci by ...designed a new iterative, chaining-based cloning method that simplifies the process of constructing specialized...

  6. Nanoblades: Tiny CRISPR Ninjas for Genome Editing Difficult Cells

    Type
    Blog Post
    Published
    Sept. 26, 2019, 12:50 p.m.
    ...electroporation, and viral transduction; but these methods aren’t stealthy enough to gain access to some cells...cells (hiPSCs). Nanoblades, a new CRISPR delivery method developed by the Ricci Lab and the T. Ohlmann Lab...Primary cells are often refractory to gene delivery methods, but the researchers was able to edit hiPSCs, mouse...Comparing Nanoblades to Existing CRISPR Delivery Methods When compared head-to-head with existing CRISPR...in line with previous research showing that the method of Cas9 and gRNA delivery can influence the level...zygotes with CRISPR components. However, this sometimes requires intracellular injections into the cytoplasm...demonstrate that Nanoblades are a potential alternative method for generating transgenic mice strains and for ...

  7. Google Forums Round Up: First Impressions of NgAgo

    Type
    Blog Post
    Published
    Aug. 4, 2016, 2:30 p.m.
    ...lipofectamine-based method to deliver NgAgo ingredients into the cell, the same method used by Gao et al...Both the CRISPR-Cas9 and NgAgo genome engineering methods have their own pros and cons (2). The NgAgo DNA...organisms (3) lies in the versatility of its delivery methods. Researchers can conveniently transfect/inject ...where people write their experiences with the new method and look for advice/tips. Based on the discussions...sections, the first section asked which of the two methods researchers found to be more successful, and the...NgAgo protocols used by respondents (transfection method, amount of each component per transfection etc....Overall, 64% of researchers were unhappy with the new method and 65% wanted to wait until someone else optimizes...

  8. Negative Can Be Positive: Open AAV Data with Addgene

    Type
    Blog Post
    Published
    Sept. 6, 2022, 1:15 p.m.
    ... different serotypes, promoters, and injection methods are best suited to their particular scientific ... We can all acknowledge that negative data is something every researcher experiences and that it often...meet our minimum standards (clear and detailed methods and image descriptions, a minimum n = 2, and well...scientists can use the Data Hub to compare different methods and vectors, and use this data to guide them in... human gene therapy trials. Human Gene Therapy Methods, 26(2), 71–76. https://doi.org/10.1089/hgtb.2015.040...Serotype 9 (AAV9) Preparations. Human Gene Therapy Methods, 30(6), 214–225. https://doi.org/10.1089/hgtb.2019.105..., Sinn, P., May, A. P., & Paulk, N. K. (2020). Methods Matter: Standard Production Platforms for Recombinant...

  9. Antibodies 101: Producing Recombinant Antibodies

    Type
    Blog Post
    Published
    Aug. 13, 2024, 1:15 p.m.
    ...Using a spectrophotometer is among the faster methods of quantification. Many spectrophotometers have an...biorender.com   Another method of harvesting uses magnetic beads. In this method, beads are incubated with... washed, followed by antibody elution. Whatever method you choose, you may not be able to elute the antibodies...will also measure the purity of your prep. In this method, antibodies are separated by size on an SDS-PAGE...Gene Expression in Suspension HEK293-EBNA1 Cells. Methods Mol Biol. 2018;1850:1-16. doi: 10.1007/978-1-4939...experimental values as measured by the Edelhoch method. Int J Biol Macromol. 2015;77:260-5. doi: 10.1016...

  10. Viral Production at Addgene

    Type
    Blog Post
    Published
    Oct. 24, 2023, 1:15 p.m.
    ...lysate method. Purity Purity of AAV preparations is assayed by comparing the relative stoichiometric ratios...Titer by a Novel Droplet Digital PCR Method. Human Gene Therapy Methods, 29(2), 96–103. https://doi.org/10.1089...preps.   Viruses are generated using standard methods that have been optimized for each specific virus...Details about our production protocols, titering methods, and quality control are described below. AAV Production...higher than those achieved using the standard qPCR method.  Titering by the University of Pennsylvania Vector...gene expression and/or function. These data are sometimes reported or posted on the material page for the...titers by droplet digital PCR. Human Gene Therapy Methods, 25(2), Article 2. https://doi.org/10.1089/hgtb...

  11. In Living Color: The Skinny on In Vivo Imaging Tools

    Type
    Blog Post
    Published
    March 27, 2014, 5:14 p.m.
    ...Shcherbakova and Verkhusha (Nat Methods. 2013 Aug; 10(8): 751-4. doi:10.1038/nmeth.2521) Far-red light photoactivatable...brain, say, or maybe a tumor. They wanted to find something better. Transparency window That’s exactly what...Biotechnology back in 2011 and then in another Nature Methods paper last year. The key to their bacterial phytochome-derived... which absorb the majority of light below 650 nanometers (nm), and the absorbance of water, which absorbs... we can’t localize one cell at a depth of one centimeter with fluorescence is because the light becomes...higher resolution images at depths up to eight millimeters – not single cells (yet) but small clusters of...these probes, he says, when in doubt, read the methods sections of the relevant papers, and then read ...

  12. Hot Plasmids - September 2019 - CRISPR, Auxin Inducible Degradation, MerMAID Channelrhodopsins, and Genome Looping

    Type
    Blog Post
    Published
    Sept. 3, 2019, 1:15 p.m.
    .../Cas9 based method to tag endogenous proteins in HCT116 cells with mAID. Using this method, the lab was...marine microorganisms based on metagenomic data. MerMAIDs (Metagenomically discovered Marine, Anion-conducting...tagging toolkit at Addgene Yesbolatova et al., Methods, 2019. PubMed PMID: 31026591. Expanding the targeting...their analysis of different publicly available metagenomic data including the Tara Oceans Project datasets...combining the analysis of publicly available metagenomic datasets with biophysical studies and the potential...Find the LADL plasmids at Addgene Kim et al., Nat Methods. 2019, PubMed PMID: 31235883. ...

  13. Easi-CRISPR: Generating Knock-In and Conditional Mouse Models

    Type
    Blog Post
    Published
    April 5, 2018, 12:42 p.m.
    ... has remained a challenge. Enter Easi-CRISPR: a method that harnesses the power of ssDNA donor molecules...60%. This is much more favorable than previous methods yielding 1-10% knock-in. Read on to learn how you...DNA, but Miura et al. (2015) developed the ivTRT method to ameliorate this problem. Briefly, you design...with standard microinjection and electroporation methods using in mouse transgenics. Designing an Easi-CRISPR... the insertion site. If you are using the ivTRT method, try to make the first two bases of the left homology...terminal)   Easi-CRISPR efficiency and delivery methods Using RNP delivery and microinjection, the efficiency...have also recently developed i-GONAD as a simple method for delivery of genome editing components to the...

  14. Plasmids 101: Dimers and Multimers

    Type
    Blog Post
    Published
    Jan. 10, 2023, 2:15 p.m.
    ...restriction digests on plasmids at Addgene, we sometimes observe something odd in our uncut DNA control: a band ...performing a diagnostic digest is a simple but effective method for detecting plasmid multimers. Digests themselves...please note that the supercoiled dimer band can sometimes overlap with the band corresponding to the nicked...after visualizing it on a gel, one of the other methods below should help in multimer identification. ...Screen multiple colonies to isolate the monomer Sometimes a plasmid can exist in a bacterial population ... bacterial colonies using one of the detection methods described above can help ensure the isolation of... and catenanes by agarose gel electrophoresis. Methods Mol Biol. 2009;582:11-25. doi: 10.1007/978-1-60761...

  15. The Many Reasons for Irreproducible Research- and a Vaccine to Eradicate It

    Type
    Blog Post
    Published
    Jan. 30, 2020, 2:15 p.m.
    ...research can be difficult to replicate. Unclear methods Until someone attempts to replicate the results...may be impossible to determine precisely how the methods were implemented. We run into this problem frequently...Reproducibility Project: Cancer Biology, where reported methods may not include how many tests were conducted on...focuses more attention on the results instead of the methods. Unreported flexibility and questionable research....  If we eliminate the problems above: unclear methods, QRPs, and small samples, then when replications...make research more reproducible? Combat unclear methods with open data, materials, and code Only when you...questions are important enough to be answered and the methods are appropriate to answer those questions, the ...

  16. Antibodies 101: ChIP

    Type
    Blog Post
    Published
    March 10, 2022, 3:25 p.m.
    ...capture method such as Protein A/G beads to collect your antibody-bound samples. With a bead method, you’...isolated and studied through a variety of downstream methods, such as qPCR or next-gen sequencing. ChIP is an...cutting. While sonication is usually the preferred method, enzymatic digestion can be appropriate when your...your fragmented, crosslinked chromatin.  Whichever method you choose, you’ll need to reserve a small aliquot...DNA is now ready for downstream analysis via any methods suitable for isolated and purified DNA, such as...  Where’s the challenge in that?  So while this method is certainly long and complex, you may be thinking... be a good idea to add "patience and an extra-methodical approach" to the top of your protocols when embarking...

  17. Rosella: A Fluorescent pH-Biosensor for Studying Autophagy

    Type
    Blog Post
    Published
    April 13, 2017, 2:30 p.m.
    ... about prior methods for studying autophagy and how Rosella improves upon them. Methods for studying ...Electron microscopy is a traditional method for studying autophagy. This method relies on the identification ...with or without an autophagy inhibitor. While this method does provide a quantitative measure of autophagy...Mizushima, N., Yoshimori, T., & Levine, B. (2010). Methods in Mammalian Autophagy Research. Cell,140(3), 313... D. J., Cuervo, A. M., & Seglen, P. O. (2007). Methods for Monitoring Autophagy from Yeast to Human. Autophagy...Quantitative Pho8Δ60 Assay of Nonspecific Autophagy. Methods in Enzymology Autophagy: Lower Eukaryotes and Non-Mammalian...

  18. Antibodies 101: Conjugation

    Type
    Blog Post
    Published
    March 26, 2024, 1:15 p.m.
    ...like fluorescence microscopy, flow cytometry, or spectrophotometry. The range of fluorophores available...2007; Stoeckius, et al., 2017). Metal isotopes are useful for mass cytometry (Bendall, et al., 2012). And...measurement in single cells. Nat Methods 14:865–868. https://doi.org/10.1038/nmeth.4380  Additional resources...antibodies for your experiments.  Many of the methods for antibody conjugation can be quite variable ...Chattopadhyay PK (2012) A deep profiler’s guide to cytometry. Trends Immunol 33:323–332. https://doi.org/10.1016...

  19. Viral Vectors 101: Systemic Capsids

    Type
    Blog Post
    Published
    Oct. 12, 2023, 1:15 p.m.
    ...delivery is achieved through the use of invasive methods, limiting researchers to accessible, spatially ...The AAV (a) capsid, (b) cargo, and (c) delivery method determine cell type- or region-specific transgene...used for expression control. (c) Viral delivery methods include focused ultrasound (FUS), intracorporeal...expression, it may be better to choose a direct delivery method over systemic delivery. Otherwise, cell-specific...immunogenicity is a concern, using a purification method that removes, not just reduces, empty viral capsids...to use. Factors to consider include the delivery method, mouse strain, target cell type or tissue of interest.... It was engineered, via the M-CREATE selection method, to cross the BBB through interactions with LY6C1...

  20. Overcoming the Challenges of Lentiviral Production

    Type
    Blog Post
    Published
    Aug. 7, 2018, 12:31 p.m.
    ...the transfection method (i.e. polyethyleneimine, calcium phosphate or liposomal methods), the volume of...lentivirus can be concentrated by a variety of methods such as ultracentrifugation, centrifugation on ...polyethylene glycol (PEG) precipitation. All of these methods ultimately isolate the viral particles allowing...contamination. Finally, choice of concentration method depends of a variety of factors such as resources...applications. For example, while the PEG precipitation method is relatively inexpensive and does not require ...lentivirus; consequently, this may not be the best method when pure virus is required downstream. When assessing... PMID: 11589831. Jiang W. et. al.. An optimized method for high-titer lentivirus preparations without ...
Showing: 121 - 140 of 712 results