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Showing: 101 - 120 of 484 results
  1. Hot Plasmids and Viral Preps - July 2021

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    Blog Post
    ...for doing gene targeting, reporter generation, controllable gene knockouts, and inducible gene inactivation...design. B) Strategy for leak-free transcriptional control. C) Iterative transduction workflow overview. Image...SL-insensitive fluorophore (LSSmOrange) as an internal control and a SL-sensitive fluorophore (circularly permuted...the cpGFP without altering that of the internal control (Fig 1). Because this method relies on the fluorescence...
  2. New and Upcoming Viral Vectors - Spring 2019

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    Blog Post
    ...cre-dependent version at Addgene! Fluorescent protein and control AAV These fluorescent protein expression vectors...interneurons. These vectors can also be used as the control vectors for experiments encoding a fluorescent-... Addgene in the next 6 months, pending quality control. For an estimate on availability date or to be ... and serotype you’d like to be notified about. Controls Plasmid Serotype Name 114472  AAV5, AAV8 ...
  3. Addgene's Top 10 Blog Posts of 2015

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    Blog Post
    ... 10. Plasmids 101: Control Plasmids Need help thinking about the types of controls you’ll need for your...provides researchers with many different ways to control gene expression. Get the full scoop from Addgenie...Addgenie Chari Cortez guides us through some common controls and why you might need them. Happy Reading!   ...
  4. AAV Packaged on Request is Here!

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    Blog Post
    ...necessary MTA, then start production and quality control.  Our packaged on request AAV service uses the ...the same trusted production and quality control processes as our in-stock service: ddPCR, purity testing...blog post on viral vector production and quality control, our AAV Packaged on Request webpage, or our announcement...
  5. Antibodies 101: Multiplex Immunofluorescence

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    Blog Post
    ...colors you like. Controls and validation Can’t forget the controls! The necessary control experiments will...from Addgene), or be prepared to run some extra controls and validate the antibody yourself. If you can... we’ll walk you through the necessary types of controls for a multiplex experiment.  Check for non-specific...using a different antibody.  Prepare a positive control Prepare and label a sample that expresses your ...naturally or by overexpression, for a positive control. You can also confirm the secondary works as expected...
  6. Plasmids 101: Plasmid Incompatibility

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    Blog Post
    ... the origin of replication and the replication control machinery (Need a refresher on the Origin of Replication... because they compete for the same replication control machinery within the cell. Most plasmids encode...two models for iteron-based plasmid replication control that are not necessarily mutually exclusive. In...plasmids, different negative regulation systems control plasmid replication of each plasmid using unique... complex than simply competing for replication control factors and tends to be more of a concern with ...Espinosa M, Díaz-Orejas R (1998) Replication and Control of Circular Bacterial Plasmids. Microbiology and...
  7. Antibodies 101: Introduction to Immunofluorescence

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    Blog Post
    ...include controls to show that your antibodies are binding specifically. For positive controls, aim to ... and isotype controls are also commonly used in IF experiments. Precisely which controls you perform will...been manipulated to overexpress it. For negative controls, use samples in which the target is known to be...research antibodies, protocols, and appropriate controls and you will be well on your way to performing...
  8. Plasmids 101: Protein Expression

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    Blog Post
    ...101 eBook! Researchers use various techniques to control protein expression for experimental, biotechnological...successful. Some mammalian systems also allow for control over when a protein is expressed through the use...Protein expression from each of these vectors is controlled by a different promoter resulting in different...to E. coli. Of all the vectors, pET, under the control of the T7 lac promoter and induced by lactose, ...researchers often place recombinant proteins under the control of the galactose inducible promoter (GAL). Other...
  9. The Materials Science of Optogenetics Experiments

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    Blog Post
    ...stimulation itself, the output of the laser must be controlled. As discussed above, each opsin variant has slightly...the A.M.P.I Master-9 Pulse Stimulator, which can control output of several lasers simultaneously, can be...powerful alternatives to the Master-9 that only control one or two lasers are also available. Optimal stimulation...loss of laser power. More recently, wirelessly-controlled optogenetic implants have been reported by several...References 1. Gutierrez DV, et al. Optogenetic control of motor coordination by Gi/o protein-coupled vertebrate...
  10. Fluorescent Protein Travel Awards - FLiPs and Fluorescent Protein Biosensors

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    Blog Post
    ...Xin hypothesized that she could make enzymes controllable by tethering them to Dronpa, a fluorescent protein...their ability to be precisely spatio-temporally controlled as a key advantage over other inducible enzyme... sugars (including lactose), and a lac operon controlled GFP. When the enzyme breaks down the HMO of interest...Photosactivatable Fluorescent Proteins Use Light to Control CRISPR Genome Editing Choose the Brightest Fluorescent...
  11. CRISPR 101: Anti-CRISPR Proteins Switch Off CRISPR-Cas Systems

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    Blog Post
    ...activity in HEK293 by reducing editing from ~30% in control samples to 0-10% in Acr samples. Acr proteins can...specific site. 2. Temporal, spatial, or conditional control of CRISPR activity Regulating Acr proteins by inducible...molecules could achieve rapid, dynamic, and spatial control of CRISPR-Cas activity. For example, fusing AcrA4II...LOV2 domain allows anti-CRISPR activity to be controlled by blue light (Bubeck et al., 2018). 3. Reduce...Your Next Experiment Read more about Optogenetic Control of CRISPR   Resources on Addgene.org Find CRISPR...
  12. Antibodies 101: Isotypes

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    Blog Post
    ...you can select an appropriate isotype control. An isotype control has the same constant heavy chain domain...doesn’t bind your antigen of interest. Isotype controls are used to make sure the staining you see is ... than nonspecific background staining. Isotype controls are used in antibody-based applications including...
  13. Antibodies 101: Polyclonal Antibodies

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    Blog Post
    ...antibody, you’ll want to use the same positive control across experiments to be aware of signal strength...you’ll want to be sure to choose the appropriate controls to be sure the staining you are seeing is real...real. It’s important to include a negative control using serum from the same species your polyclonal antibody...antibody was generated in or a polyclonal isotype control, to account for nonspecific binding. Now that you...
  14. Plasmids 101: E. coli Strains for Protein Expression

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    Blog Post
    ...are available to confer greater transcriptional control, assist with proper protein folding, and deal with...Contains mutated lac permease whch allows for linear control of expression F- ompT lon hsdSB (rB- mB-) gal ...polymerase (RNAP) from the bacterial genome under control of the lac repressor, which is inducible by the...cases, some strains carry an additional measure of control such as the pLys plasmid, which suppresses basal...difference being that the latter provides tighter control of basal expression. What if I don't see protein...
  15. What's New in CRISPR - March 2020

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    Blog Post
    ...McClean’s lab generated an optogenetic toolkit that controls repression of gene expression in Saccharomyces...transcriptional repressor Mxi1, and an optogenetic tool that controls nuclear localization (LINuS). Blue light renders...mRNA decreased after 20 minutes in xylose (which controls expression of dCas9). The lab demonstrated the...
  16. FLEx Technology and Optogenetics: Flipping the switch on gene expression with high spatial and temporal resolution

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    Blog Post
    ...basics: What is optogenetics? Optogenetics: Controlling neurons with light In 2005, a team from Stanford...1984; Harz and Hegemann, 1991). These proteins control the flow of electric charges across cell membranes...opsin genes in targeted cells makes it possible to control neuronal activity with a specificity far greater... to flow across the axon’s membrane, thereby controlling neural activity (Bernstein and Boyden, 2011; ...tool that provides precise temporal and spatial control of gene expression in vivo (Schnütgen et al., 2003...Millisecond-timescale, genetically targeted optical control of neural activity." Nature neuroscience 8.9 (2005...
  17. A Look at Addgene's QC Process

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    Blog Post
    ...Tips for Plasmid Quality Control Plasmids 101: In-house NGS Plasmid Quality Control Now at Addgene Bioinformatics...Addgene, we put a lot of effort into our quality control (QC) processes to screen for and reduce these errors...non-negotiable. By maintaining a high standard of quality control, we have built a trusted plasmid catalog containing...
  18. Tips for Using BLAST to Verify Plasmids

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    Blog Post
    ...sequencing results we analyze as part of our quality control process has steadily grown. On a busy week, we ... more than 200 plasmids as part of our quality control process. Consequently our team has refined our ...sequence! You might also enjoy seeing how our quality control process has changed with the introduction of next...Plasmids 101: An Inside Look at NGS Plasmid Quality Control Learn about our Snapgene-powered plasmid maps. ...
Showing: 101 - 120 of 484 results