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Showing: 181 - 200 of 891 results
  1. SciComm with the Experts at Science in the News Part 1

    Type
    Blog Post
    Published
    March 16, 2017, 1:06 p.m.
    ...supporters of science communication. To help you think about ways to effectively communicate your science, we...Scientist Jessica Welch Have Had to Explain Importance of Narrative in Science Communication Conversation...Conversation in Science Communication The Purpose of Science Communication #1 Mistake Scientists Make when Communicating...News at Harvard University. Effective science communication is required to promote public support for research... organization that works to promote science communication. Science in the News hosts a podcast, seminars...That’s right, #ActualLivingScientists, eager to communicate their science. In this first half of our two-...programs SITN runs and learn how they think about communicating science. Listen to the interview with Science...
  2. Plasmids 101: Optimizing Plasmid Yields

    Type
    Blog Post
    Published
    May 26, 2016, 2:30 p.m.
    ...various time points. Measuring the optical density of the culture can indicate the number of cells present in...in-house protocol. DNA yields for this procedure are typically in excess of 100 ng/ul, more than enough DNA to...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...cloning Bacterial strains adapted for protein purification use the cell’s resources to produce high levels...retransforming the plasmid into a strain meant for DNA purification. It sounds like extra work, but it will likely...your E. coli to ensure it is suitable for your application. We have previously reviewed many common lab ...
  3. 10 Great Guest Posts We're Thankful For

    Type
    Blog Post
    Published
    Nov. 18, 2016, 3 p.m.
    ...light and chemicals respectively. Didem Goz Aytruk from Connie Cepko’s Lab at Harvard Medical School describes...although fluorescent proteins are incredibly useful, chemical fluorophores can still be used in a wide variety...variety of experiments. Read more to find chemical fluorophores for your next experiment. Nucleic acid based...systems that report the order in which specific chemical inputs are received by a cell. These so-called...report upon and/or engineer “temporally ordered biochemical events” such as those that occur during development...containing only the sequences required for viral replication and transcription as well as reporter genes. ...Membrane-Rupturing Microscopic Tools In this post, Jessica Polka, formerly a postdoctoral researcher in the...
  4. Droplet Digital PCR for AAV Quantitation

    Type
    Blog Post
    Published
    Jan. 16, 2020, 2:18 p.m.
    ...take to achieve a clean NTC: Have a dedicated bench with a dedicated set of pipettes for ddPCR set-up. ...absolute quantification of viable lactic acid bacteria in faecal samples." Journal of microbiological methods... we have used quantitative PCR to evaluate the physical titer of our preps. We often repeat this assay...factor of 2. This means that if you set up two identical assays with the same sample, you could end up ...would be valid. This is why the AAV reference is critical. It allows you to determine if your titers are.... Each droplet contains the ingredients for amplification of the target DNA. This partitioning reduces...detection of the product. As an added benefit, replicates are built into the technology. One well (containing...
  5. Lentiviral Vector Uses and Overview

    Type
    Blog Post
    Published
    May 19, 2016, 2:30 p.m.
    ...many CRISPR applications, and they’ve also had success in clinical gene therapy applications. Read on to... but this research is still in the pre-clinical/early clinical stages. Researchers are also working to...to learn more about the current (and future) applications of lentiviral vectors! Lentiviral vector history...original system, the possibility of creating a replication-competent virus via recombination between the...of recombination events necessary to create a replication-competent virus. Second, Tat is eliminated through...barcoding libraries have been used for complex applications like lineage tracing in heterogeneous tumors...2015: lentiCRISPR v2, used both for targeted modification and genome-wide screening.   Lentiviral vectors...
  6. Your Lentiviral Plasmid FAQs Answered

    Type
    Blog Post
    Published
    April 23, 2014, 1:08 p.m.
    ...terms of biosafety? A8: According to the American Biological Safety Association, "the two major risks ...lentiviral plasmids created for a variety of applications including cDNA expression, shRNA-mediated knockdown... looking for some additional information or clarification on these vectors. Read on to find the answers...scientists often refer to as “retroviruses” are technically gamma-retroviruses - another, separate member...differences may seem subtle they result in a key physiological difference between lenti- and retroviruses. ...transfer vectors for transient transfections? A2: Technically, yes. Will it actually work? That depends. The...when using a plasmid backbone that was designed specifically for transient expression (find some useful backbones...
  7. Unique and persistent IDs for improved reproducibility: Addgene now supports RRIDs and compact identifiers for all plasmids

    Type
    Blog Post
    Published
    Nov. 20, 2018, 8:17 p.m.
    ...this approach has been adapted for the identification of physical materials that we use in our labs, including...RRIDs and the Resource Identification Initiative Compact identifiers for biomedical data How Addgene works...about which reagents were used? Unambiguous identification of a reagent is crucial for reproducibility...to identify and reference documents, files, or physical reagents. What are persistent identifiers? Perhaps...persistent and exist online indefinitely. PIDs historically referred to objects that exist online, but this...item. Given a specific Addgene ID # listed in a publication, you can quickly pull up the associated plasmid...plasmid page also helps researchers find other publications that have used the same plasmid through the ...
  8. Plasmids 101: Mammalian Vectors

    Type
    Blog Post
    Published
    March 25, 2014, 3:15 p.m.
    ... a bacterial origin of replication (ORI) will not allow for plasmid replication in mammalian cells, for...Therefore, it is not always mission critical to make sure the plasmid replicates in the cell, as many of these... their bacterial counterparts, including how replication occurs and whether selection is necessary for... way. Selection methods, described below, are typically employed when creating stable cell lines and are...the nuclear genome, in the absence of plasmid replication, the foreign DNA will be degraded or diluted ...expressed in trans within the cell for effective replication. Cell lines expressing the Epstein–Barr virus...antigen (293E or 293T cells), allow for episomal amplification of plasmids containing the viral EBV or SV40...
  9. Viral Vectors 101: Biosensors

    Type
    Blog Post
    Published
    July 6, 2023, 1 p.m.
    ...the amount of a given factor within a biological system. Basically, biosensors provide quantifiable readouts...biosensor?! You can do more than just ‘sense’ biological compounds and reactions; you can quantify them...of the biosensors used in research are very sophisticated, but at their core they can all be boiled down...pretty simply – they are systems that measure biological phenomena by generating an output which is directly...readouts for levels of different chemicals, hormones, proteins, etc., that you are interested in. The most...we will refer to as the analyte, needs to be specifically recognized by another factor, the receptor. ...fluorescence, pH, etc.). The transducer will generate a numerical value which represents the amount of analyte present...
  10. Enabling Precision Functional Genomics with the Target Accelerator Plasmid Collection

    Type
    Blog Post
    Published
    May 11, 2017, 2:30 p.m.
    ...approach that has been the historical standard. Specifically, in our recent publications, we used the cancer ...result, how most of these “variants of unknown significance” (sometimes called “VUS”) function is unknown... if the majority of information on each cancer clinical sequencing report includes rare variants that ... variants across a large number of genes as systematically as possible. In developing these assays, we...tumorigenesis assays, drug epistasis assays, and morphological profiling can be used as generalizable strategies... are described in this paper Systematic morphological profiling of human gene and allele function ...pathway reference collection is described in this publication We also wrote an extensive review on the exciting...
  11. Antibodies 101: Validation

    Type
    Blog Post
    Published
    March 24, 2022, 1:15 p.m.
    ...intended application - Remember, just because your antibody performs as expected in one application does ...why validation is so important. Antibodies are a critical component of the researcher toolkit due to their...major culprits in the reproducibility crisis of biomedical research (Baker, 2015; Bradbury & Plükthorn, ...strategies for antibody validation in different applications. Here, I want to highlight the general suggestions...intentionally generalizable and not specific to certain applications or antibody targets. That said, not every strategy...will be suitable for every antibody or every application. The goal is to show that your antibody has been...strategy to use will depend on your intended application and available resources.     Figure 1...
  12. Click Biology: How to Click and Play to Explore Biology

    Type
    Blog Post
    Published
    Oct. 21, 2025, 1:15 p.m.
    ...the opportunities from reliable biological reactions. Nature Chemical Biology. https://doi.org/10.1038...and work well the first time. But biology is complicated — so many different parts and species, with components...would define a good tool for sticking together biological components. Nearly all of us played with LEGO...surprisingly useful. To apply these principles in a biological setting, we first need to define what features...Figure 1). Together the features with optimal biological performance are described as Click Biology (Howarth...BioRender.com.   Principles of Click Biology Physical scientists have been talking about Click Chemistry...possible through the utilization and development of genetically engineered components, like protein tags (Figure...
  13. The Future of Research Symposium Boston 2015

    Type
    Blog Post
    Published
    Oct. 20, 2015, 2:30 p.m.
    ...their visions for a successful and sustainable biomedical research sector at our first Future of Research...discussed, many related to the structure of the biomedical workforce. Quotes taken directly from participants...of Medicine and the University of Massachusetts Medical School. Graduate education programs are also beginning...internship to be taken in an industry, regulatory, or clinical environment. It remains contested, however, whether...shape and inform the overall structure of the biomedical research sector, and what a tenable workforce...The panel discussion on Friday morning will be dedicated to Academic data and the Labor Market. On this...Shapes Science’ and contributing to the NIH’s Biomedical Research Workforce Working Group. Along with ...
  14. Transferable Skills Guide: Conflict Resolution

    Type
    Blog Post
    Published
    Jan. 4, 2022, 2:15 p.m.
    ...conflict is not always what was communicated but how it was communicated. The next step is to come up with...of lapsed communication. Making some assumptions about how something should be communicated is necessary...set of transferable skills, coupled with your technical skills, can open new career opportunities for ...conflict can also be good. In science, a reviewer’s critical comments on your manuscript is a form of (hopefully...scientist. And some amount of conflict is actually critical in the business world. Companies and organizations...traced back to one of a few trouble spots:  Communication (or lack thereof): Information sharing gets ...organization gets, and creating new avenues of communication can create as many problems as it can solve....
  15. Hot Plasmids: February 2026

    Type
    Blog Post
    Published
    Feb. 17, 2026, 2:15 p.m.
    ...Lajoie, M. J., et al. (2013). Genomically recoded organisms expand biological functions. Science, 342(6156...protein, but its modest photostability limits applications like long-term imaging or super-resolution techniques...head-to-head comparisons of these proteins in identical conditions. Find mScarlet3-S2 and mScarlet3-H ...produced higher yields than previous versions — typically double or triple (Figure 2). Based on these results...hM3D(Gq)-mCherry) or 3 (pAAV-hSyn-DIO-mCherry) replicates. Over 60 labs have already ordered these...preserves the present for study in the future. Specifically, the present transcriptome. The system, developed....-K., Wu, M., Gong, Q., & Chen, F. (2026). A genetically encoded device for transcriptome storage in mammalian...
  16. March for Science

    Type
    Blog Post
    Published
    April 21, 2017, 2:30 p.m.
    ...Democrats more often than Republicans, the March is not about Democrats or Republicans (16). This is a Pro-...general (1). Science and politics? Science is an apolitical process for seeking knowledge. The process begins... again. No part of this process is inherently political so why is there a march in Washington, D.C., the...States government? Politics and science are intrinsically linked: governments exist in reality and science...as evidence of climate change, the safety of genetically modified organisms (GMOs), the absence of a link... grant in the last five years as polled in the American Association for the Advancement of Science) believe... it.  3) Linking scientists to one particular political party while alienating the other While scientists...
  17. Multiple Plasmids at a Low Price: Kits from Addgene

    Type
    Blog Post
    Published
    Sept. 14, 2016, 2:30 p.m.
    ...well as protease sites to facilitate protein purification. We hope this kit will allow you to quickly ...for a variety of synthetic biology or protein purification studies in E. coli. 800 and 1900 Series If you...polycistronic E. coli expression constructs. Some applications of plasmids from this kit include the production...: Čelešnik, Helena, et al. "Biosafety of biotechnologically important microalgae: intrinsic suicide switch... Rogers, Jameson K., and George M. Church. "Genetically encoded sensors enable real-time observation ...and Charles E. Melançon III. "Detection and Quantification of Ribosome Inhibition by Aminoglycoside Antibiotics... Ribosome-Controlled Fluorescent Reporter."ACS chemical biology 11.1 (2015): 31-37. pCri system The Gomis-Ruth...
  18. Early Career Researcher Toolbox: Finding Relevant Papers

    Type
    Blog Post
    Published
    Jan. 9, 2020, 1:45 p.m.
    ...show all publications by an author, total number of citations, and the number of publications that heavily... staying on top of the ever expanding body of biomedical literature! PubMed PubMed is the classic search...read the abstract or full text of the paper, publication date, a relevance score, and type of article....that term. You can also set up alerts for new publications from a particular author. Saving papers Papers...interest.  Best uses Accessing the vast body of biomedical research papers. Twitter Scientists often use... work, so it’s also a good place to look for publications. Bonus: papers have to be summarized in 280 ...organizations, and universities often tweet about publications in the fields of research they support. Monitoring...
  19. Antibodies 101: Choosing the Right Isotype

    Type
    Blog Post
    Published
    April 6, 2023, 3 p.m.
    ...your experiment (all well validated for your application, of course!) When the stars are aligned and the...factors that affect isotype choice. Target and application should be considered The first question you may... a strong signal and to work in a variety of applications. The desired specificity of your secondary antibody...affect my experiment?” Well, it depends on the application and target. If you are running a basic western...target is expressed at very low levels or your application requires a high degree of affinity, then species...considered when choosing an antibody. In some applications probing species-on-species, i.e. using a mouse...choosing antibodies   Complexity is a key factor Biological systems tend to be complex with a variety of ...
  20. Tips for Titering Your Lentiviral Preps

    Type
    Blog Post
    Published
    March 15, 2016, 2:30 p.m.
    ...et. al.). Physical versus functional titer Viral titers usually come in two flavors, physical or functional...the target cell’s genome. Physical titer The two most common assays for physical titer are direct p24 measurements...functional. Physical titers measure the amount of viral particles in a sample and are usually based on the...produced can actually infect cells. These assays typically involve infecting a target cell line with your...particle. Consequently, titers based off of p24 quantification tend to be overestimates since they can include...quantify the amount of PCR product that comes from amplification of the original plasmid which can over-inflate...methods tend to be more accurate than measuring physical titer, there is a risk that they may underestimate...
Showing: 181 - 200 of 891 results