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We narrowed to 895 results for: ANT;

Showing: 141 - 160 of 895 results

  1. Deep Dive: Statistical Tests (Comparisons)

    Type
    Blog Post
    Published
    March 7, 2023, 2:15 p.m.
    ...synergistically, antagonistically, were additive, etc.). ANCOVA and MANCOVA All variants of ANOVAs discussed...there is a statistically significant difference in that variance. If you want to know type of distribution...normality (or lack thereof). Alternatively, a Quantile vs. Quantile plot can determine if your data deviates...sets. Significance is a numerical value which quantifies the likelihood that a result is due to chance.... Below are several core factors of statistics relevant for many downstream statistical tests.   Independent... Variance – Approximately equal Data type - Quantitative If your data doesn’t fit the requirements above...assess if the mean of an experimental group is significantly greater or lesser than the mean of a control...

  2. PCR Applications for Copy Number Variation Assays

    Type
    Blog Post
    Published
    April 26, 2022, 1:15 p.m.
    ...multicopy variant of a gene exists, there must be assays that researchers can use to quantify said copies...ddPCR provides absolute quantitative data, instead of relative quantification.  Even though no one option...: 15833050. Ma L, Chung WK. Quantitative analysis of copy number variants based on real-time LightCycler...PCR-based applications (qPCR and ddPCR.) qPCR Quantitative/real-time PCR (qPCR) has been used for copy ...expressed, one-copy ‘housekeeping’ gene), and quantified relative to a 'normal' sample with known copy...about qPCR is that since it measures relative quantification - that is, since you’re looking at the amount... dye, with a fluorescent probe and quencher to quantify specific amplicons.  Sybr has high background ...

  3. Hot Plasmids: Summer 2025

    Type
    Blog Post
    Published
    Aug. 28, 2025, 1:15 p.m.
    ...biosensor for cAMP dynamics. The mGold2 variants significantly enhanced photostability — 25-fold over ...neuronal tracing, anterograde tracing poses challenges, from non-selective anterograde transport to a lack...of genetic control. ATLAS (anterograde transsynaptic label based on antibody-like sensors) changes that...months we highlight some of the new plasmids, antibodies, viral preps, and more in the repository through...fluorescent protein mGold2 Viral delivery of TnpB for plant genome editing LARRYv2 pooled libraries for cell...own AAV6 and AAV11 packaging plasmids Mapping anterograde synaptic connections with ATLAS Bright and ...fused to mVenus, mGold2s, or mGold2t. Bottom: Quantification of photostability. Image reused from Lee & ...

  4. Special Delivery: Fluorophore Targeting for FRET Studies

    Type
    Blog Post
    Published
    July 19, 2016, 2:30 p.m.
    ...activity (Ni, Titov, & Zhang, 2006), quantifying antibody/antigen interactions (Saraheimo et al., 2013...contributed by guest blogger James D. Fessenden, an Assistant Professor at Brigham and Women’s Hospital. Biochemists... drug discovery by big pharma (i.e. HTRF and LanthaScreen) (Degorce et al., 2009), measuring intracellular...nonspecifically soak up your fluorophore package. One important concept in FRET experimental design is that the...donor first where labeling specificity is most important. Donor labeling and the need for specificity Donor...protein molecules contain the donor and, more importantly there is no fluorescence background resulting...genetically-encoded FRET donors (Fig. 1). Scores of FP variants have been created, thereby enabling a broad spectrum...

  5. How Addgene Creates Content

    Type
    Blog Post
    Published
    Nov. 17, 2022, 2:15 p.m.
    ...asked questions. We also want to tell you about things you didn’t know you wanted to know about, like research... the example of our Antibody Guide, which was published alongside our new antibody services in the spring...While Rachel had antibody experience, we also had the deeper expertise of our antibody team to rely on....In the case of the antibody guide, primary research and previously written Antibody 101 blog posts were... statement extends beyond plasmids, AAVs, and antibodies to our content, website, Data Hub, and everything...that process. Our repository of plasmids, AAVs, antibodies, and data allows scientists to easily and quickly... series of conversations on resources with our antibody and content team, we identified what applications...

  6. Hot Plasmids - February 2022

    Type
    Blog Post
    Published
    Feb. 22, 2022, 2:15 p.m.
    ...while the anti-HA frankenbodies include mEGFP, mCherry, and HaloTag. Figure 1: (a) Anti-FLAG frankenbody...determining region of an anti-FLAG scFv and a stable scFv scaffold. (b) Schematic of anti-FLAG-FB-GFP binding...localization. Adapted from Liu et al. 2021. Anti-FLAG and anti-HA frankenbodies have a variety of applications...up here.  Here's what you'll find in this post: Anti-FLAG Frankenbodies for modular imaging of cellular...system for mammalian genome regulation and editing Anti-FLAG Frankenbodies for modular imaging of cellular...cellular targets by: Mike Lacy Adding to their set of anti-HA frankenbodies (Zhao et al. 2019), Tim Stasevich...Hiroshi Kimura’s labs have recently published a set of anti-FLAG frankenbodies, a flexible, modular tool for...

  7. A Guide to Getting Started in Undergrad Research

    Type
    Blog Post
    Published
    June 8, 2021, 1:15 p.m.
    ...can vary "Lab assistants" usually wash glassware, prep media, etc. "Research assistants" are more involved...daunting. During my first year of college, I knew I wanted to try research, but had no idea what to expect...investigator (PI) Runs the lab Writes a lot of grants Varying degrees of engagement with what happens...the lab Official title is typically Professor, Assistant Professor, Associate Professor Sometimes teaches...independent project. Lab technician / Research assistant Typically has a Master's or Bachelor's degree...order materials, lab maintenance Administrative assistant: assists PI with admin duties Staff scientist:...worthwhile and can help us make decisions about what we want to do in the future. How do I get started with research...

  8. Lambda Red: A Homologous Recombination-based Technique for Genetic Engineering

    Type
    Blog Post
    Published
    Dec. 15, 2016, 3:57 p.m.
    ...confirmation of recombinant clones If a antibiotic resistance gene has been inserted, recombinants can first...major advantage of using this method for lambda red expression is that it doesn’t require antibiotic selection...  References 1. Costantino N, Court DL. Enhanced levels of λ Red-mediated recombinants in mismatch repair...outgrowth of bacteria. Selection and confirmation of recombinant clones.    Figure 2: Overview of using... system to replace a gene of interest with an antibiotic resistance cassette.   Substrate DNA Design..., including selectable DNA fragments, such as antibiotic resistance genes, as well as non-selectable DNA...replacements and tags.  The typical frequency of recombinants is 1 positive clone out of 104 to 105 colonies...

  9. Five Popular Model Organisms, Part 2

    Type
    Blog Post
    Published
    Sept. 29, 2020, 1:15 p.m.
    ...utilization, Arabidopsis has made significant contributions to understanding plant and crop science alike.  Arabidopsis...for use in Arabidopsis. There are also important tips for plant transformations and the use of Arabidopsis... The development of Arabidopsis as a model plant. The Plant Journal, 61(6), 909–921. https://doi.org/10.1111...page Find more plasmids and resources for plant resources on Plant Plasmids Collection Page Read our molecular...Justin Ng and Alyssa Cecchetelli Science is a constantly evolving and demanding field, requiring a variety...vastly expanded axolotl research. One of the most significant advances is the sequencing of the entire axolotl...research providing insight into some of the most significant and fundamental biological processes. Many of...

  10. CRISPR 101: Cytosine and Adenine Base Editors

    Type
    Blog Post
    Published
    Feb. 13, 2025, 2:15 p.m.
    ...So the development of near-PAMless Cas9 variants significantly expands the library of accessible genomic...Kim et al., 2017 SaBE3, BE3 PAM variants, BE3 editing window variants   Greatly expands the number of ...processes. BER = base excision repair. Note: hypoxanthine (shown) is the nucleobase component of the nucleoside...increase base editing efficiency, Komor and team wanted to force the cell to use the deaminated DNA strand...upstream of the PAM.  David Liu’s lab generated BE3 variants with other deaminases: AID, CDA1, and APOBEC3G... Liu lab also used natural and engineered Cas9 variants to develop five new base editors with distinct...HF-BE3, a base editor containing high fidelity Cas9 variant HF-Cas9 (Rees et al., 2017). HF-BE3 showed 37-fold...

  11. Polymerase Chain Reaction Overview and Applications

    Type
    Blog Post
    Published
    Aug. 10, 2021, 1:15 p.m.
    ...site-directed mutagenesis.  Quantitative polymerase chain reaction, qPCR Quantitative polymerase chain reaction... to quantify the concentrations of multiple starting DNA templates in one sample. It is important to note...heating and cooling steps. PCR relies on heat resistant DNA polymerase from the thermophilic bacterium...aquaticus (Taq). Taq polymerase is thus a heat resistant enzyme that can withstand changes in temperature...to confirm product presence, size, and relative quantity. End point PCR is most commonly used in molecular...genotyping. It’s extremely useful but is not as quantitative as other methods of PCR. Theoretically scientists...scientists should be able to determine the quantity of DNA after a PCR reaction as the amplicon doubles every...

  12. A Primer on Optogenetics: Introduction and Opsin Delivery

    Type
    Blog Post
    Published
    Sept. 10, 2015, 2:30 p.m.
    ... you want to use optogenetics The most important question to consider is what exactly do you want to use...and components necessary to run it? And, most importantly, what are the methodological and experimental...considerations? I recently spent two months in the lab of Antonello Bonci, Director of the National Institutes of ...optogenetics for? The technique is non-trivial; you don’t want to spend months doing surgeries and making fiber...region you wish to stimulate 2) Fabrication and implantation of the optical fiber into the region of interest...any optogenetic experiment. There are numerous variants for the different types of opsins available and...of North Carolina) that offer his constructs. Importantly, control viruses (not expressing the opsin) are...

  13. CRISPR 101: Multiplex Expression of gRNAs

    Type
    Blog Post
    Published
    Sept. 10, 2020, 11:45 a.m.
    ...plasmids, multiple Cas9 variants are available: wt humanized Cas9, D10A nickase mutant (Cas9n), dCas9 (transcriptional...pCAMBIA. Cas9 is plant-optimized, and plasmids are available for both monocot and dicot plants, with a choice...Cas9 toolkit for multiplex genome editing in plants.” BMC Plant Biology 14 (2014): 327. PubMed PMID: 25432517...multiplex genome editing in monocot and dicot plants.” Molecular Plant 8(8) (2015): 1274-1284. PubMed PMID: 25917172...suitable for other model systems, including E. coli, plants, Drosophila, and zebrafish!   Why use multiplexed...This increases the chance that all the edits you want to make will happen.  There are many reasons to ...with Golden Gate and Gibson assembly methods If you want to scale up the number of gRNAs in your plasmid,...

  14. New Tool for Lineage Tracing: The ClonTracer Library

    Type
    Blog Post
    Published
    Sept. 22, 2015, 2:30 p.m.
    ... develop a way to quantify the take rate of mouse xenografts after cell implantation. Their goal was to...cells that represent the preexisting resistant subpopulation 2. Resistant cells among the separate replicates...ClonTracer library, Bhang et al. found that antibiotic resistant cancer cells exist prior to drug treatment...majority of the resistant populations. In fact, 88% of the barcodes within the resistant populations were...decided to do a post-doc at Novartis because she wanted first-hand experience in industry research. When...determine whether or not cancer cell populations resistant to drug treatments arise during treatment or are... outcomes (see schematic depiction below): 1. Resistant cells among the separate replicates would contain...

  15. Plasmids 101: CcdB - The Toxic Key to Efficient Cloning

    Type
    Blog Post
    Published
    Dec. 8, 2016, 3:30 p.m.
    ...expressing the recombinant plasmid to propagate. Any cells that contained non-recombinant vectors (re-ligated...DB3.1, which contains a mutant version of DNA gyrase (gyrA462) that is resistant to the toxic effects of...factor plasmid of E. coli, is part of a toxin-antitoxin system encoded by the ccd operon, which is responsible...another gene found in the ccd operon, codes for the antitoxin protein (CcdA) that protects the cell against ...the number of clones that do not contain the recombinant plasmid and therefore makes the cloning process...modern version of this older system, with added advantages that will be discussed in detail in a separate...post. Focusing on the ccdB aspect, Gateway takes advantage of the same principle that cells will not propagate...

  16. An “elegans” Approach to Better CRISPR/Cas9 Editing Efficiency

    Type
    Blog Post
    Published
    Dec. 17, 2020, 1:30 p.m.
    ...Jordan Ward who is an assistant professor at the University of California, Santa Cruz. Emerging CRISPR...blogger! Jordan Ward is an assistant professor at the University of California, Santa Cruz where his group ...CRISPR/Cas9 editing strategies in C. elegans As brilliantly and irreverently illustrated in the parable of...fluorescence (GFP; Tzur et al., 2013), or rescue of mutant phenotypes (unc-119) (Dickinson et al., 2013). ...Andy Fire’s lab used oligo-mediated knock-in of a dominant mutation, known as co-conversion (Arribere et ...-CRISPR and co-conversion approaches have the advantage of being used in any genetic background, but require...repair of a temperature-sensitive pha-1 mutation significantly enriches for knock-in of 2x and 3xFLAG epitopes...

  17. 9 tips for a successful postdoctoral experience

    Type
    Blog Post
    Published
    Oct. 9, 2018, 12:21 p.m.
    ...travel, teaching, grant writing, etc. Also, it is unlikely that a mentor has the only relevant expertise and... phenomenon? Exploration can be important, but it is equally important to have a plan to get to mechanism...talk takes significant effort. It requires evaluation of all of the data and any recent relevant studies ... often more easily done in reverse. Assuming you want to become competitive for a Group Leader position...preparation) A history of successful funding (fellowship grants) A project with sufficient preliminary data to...your own lab and get an independent investigator grant (e.g. an R01 from the NIH, in the United States)...researcher. Depending on the position, you may also want some evidence of teaching experience. How do you...

  18. Transferable Skills Guide: Teamwork

    Type
    Blog Post
    Published
    Nov. 28, 2017, 2 p.m.
    ...team, you don’t necessarily want a lot of redundant skills - you just want the necessary skills. You might...but equally important is making sure all team members understand what roles they’re meant to fill and ...equivalent of a senior thesis), I knew early on that I wanted to work with a partner. WPI’s emphasis on teamwork...year isolating pheromones from various C. elegans mutants by myself, I would have slowly gone crazy. As it...and others, we have updated our kit process substantially and have plenty of ideas for further improvements...year, or a few months, or even a few weeks. The important thing to remember is that every team should have...when I do come across one. Also, remember, one important feature that all projects have in common - and...

  19. Transferable Skills: Negotiation

    Type
    Blog Post
    Published
    March 3, 2022, 2 p.m.
    ...weekend - why? Do they have an important plans? What is most important to each person? Someone has to... in the area I want to explore while also ensuring that my work gets completed? I want my company to pay...everyday What I didn’t realize was how much I was constantly negotiating, every day. As a grad student, I ...I was negotiating with my PI on how to spend my grant money (Can I attend this conference?) and with my...negotiation as a zero sum game - that is, if I get what I want, that means you don’t. In this mindset, one of us...big conference - Is one of those options more important to you and why? What are their expectations/...someone doesn’t collect their data), ask why you both want this time and what your needs actually are: Maybe...

  20. Viral Vectors 101: Producing Your rAAV

    Type
    Blog Post
    Published
    July 16, 2024, 1:15 p.m.
    ...of Adeno-Associated Viral Vectors by Oxidant-Based Disinfectants. Human Gene Therapy, 32(13–14), Article...basics of rAAV production.  Of course, you will want to make sure that your final stocks only contain...your cells, wait 2–5 days and then collect the supernatant and/or producer cells for further processing....depend on the serotype, as some rAAV serotypes are abundantly released into the culture media, while others...you can consider using unpurified AAV from the supernatant (Goodwin et al., 2020) or crude cell lysate (...  Purification To purify your rAAV from your supernatant, you can simply use polyethylene glycol (PEG)... 25 mL of 40% PEG solution to each 100 mL of supernatant (final concentration of 8%). If, however, you...
Showing: 141 - 160 of 895 results