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Showing: 181 - 200 of 822 results
  1. FPbase: A new community-editable fluorescent protein database

    Type
    Blog Post
    Published
    May 16, 2018, 1 p.m.
    ... a DOI referencing primary literature, and every effort is made to moderate and cross-check all data with...affected by environmental conditions (such as temperature, pH, fusion protein, etc...).  There are many... Addgene blog – outlining various important considerations when choosing a FP, but much of the primary... making such a decision remains spread across literature in publications that introduce these tools. ..., and I collaborated with him on a web-based interactive visualization of FP attributes (which turned ...that allows users to see when a given page has unmoderated changes and to view previous versions.  Currently... with published literature as soon as possible after submission. Using FPbase The most obvious use case...
  2. Troubleshooting and Optimizing a Western Blot

    Type
    Blog Post
    Published
    Sept. 17, 2024, 1:15 p.m.
    ...your incubation temperature. Some proteins aggregate at 95 °C, a common lysis temperature, so consider a...background noise. Temperature and time You may need to optimize your antibody incubation temperature and time.... variants Check literature Posttranslational modifications Check literature Highly charged...said, normalizing to total protein expression is preferable, and more accurate, than normalizing to ubiquitously...recombinant multiclonal antibodies to increase overall signal from the primary antibody.  Pro tip! If ...common conditions are 4 °C overnight or room temperature for 1–2 hours, there is some evidence that antibodies... including trying longer incubations at both temperatures if needed. Washes Check your antibody manufacturer...
  3. Antibodies 101: Introduction to Immunofluorescence

    Type
    Blog Post
    Published
    Nov. 16, 2021, 2:15 p.m.
    ...we’ll go through some of the most important considerations to make when planning and performing an IF ...IF experiment. What is immunofluorescence? Generally speaking, IF is an application in which antibodies...iBiology). IHC and ICC are essentially just more general terms that can also refer to assays using non-fluorescent... visualize their target. These antibodies are generated against a specific antigen and then conjugated... more common is that secondary antibodies are generally polyclonal, which means that multiple secondary...amplification. Another reason is cost effectiveness. Generating and validating primary antibodies is a time consuming...antibodies that exist and you can begin to see why generating fluorophore-conjugated versions for each primary...
  4. Plasmids 101: Biotinylation

    Type
    Blog Post
    Published
    Nov. 15, 2018, 1:50 p.m.
    ...biotinylation, the discovery of the biotin-avidin interaction and the uses of biotinylation in molecular biology... and energy transduction. Biotinylation is the general process by which biotin is added to a protein or...protein (BCCP). Discovery of the biotin-avidin interaction   Figure 1: Biotin is enriched in egg ... of the strongest noncovalent protein-ligand interactions found in nature. Once the bond is formed it ...it is unaffected by changes in pH, temperature or organic solvents. Uses of biotin in molecular biology...scientists began to exploit biotin and its strong interaction with avidin for molecular biology and biotechnology...that are coated with avidin. The biotin-avidin interaction has also been adapted for use in immunohistochemistry...
  5. Treating Muscular Dystrophy with CRISPR Gene Editing

    Type
    Blog Post
    Published
    Jan. 26, 2016, 3:30 p.m.
    ...many distinct CRISPR therapies to match these different mutations. For each therapy, effectiveness and ...’s size makes it difficult to deliver via gene therapy, so researchers have set their sights on another...work with dystrophin exon skipping? For such a therapy to be successful, multiple requirements must be...minimal risk of off-target editing. In order for the therapy to persist over time, stem cell editing would be...in DMD, and it’s estimated that exon skipping therapies would be applicable to 80% of DMD patients. ...characterizes additional, unique facets of CRISPR DMD therapy. Long et al. show that AAV-CRISPR does not cause...represent a great step forward for CRISPR gene therapy, it’s important to realize that DMD is a simpler...
  6. Building and Validating Recombinant Antibodies: A Case Study

    Type
    Blog Post
    Published
    April 5, 2022, 1:20 p.m.
    ... used to generate cDNA, which  was used as a template for PCR amplification with a degenerate primer set...limitation of hybridoma generated mAbs is that if the frozen cell line becomes non-recoverable, the stock of the... distributed by Addgene.  The plasmids used to generate these antibodies were based off of a large collection... they were also able to isolate RNA from non-recoverable hybridoma stocks, without having to grow up the... the cells. This RNA could then be used to generate functional recombinant monoclonal antibody (R-mAb)...manner. Cells were labeled with both a hybridoma generated mAb and the R-mAb, with the R-mAb being verified...encoding sequence within the plasmid backbone to generate R-mAbs of different subclasses, including subclasses...
  7. Opto-Nanobodies: Using Light to Manipulate Cell Signaling and Protein Purification

    Type
    Blog Post
    Published
    Nov. 19, 2019, 2:08 p.m.
    ...induced binding. The lab used this general design scheme to generate two more OptoNBs, one against mCherry...loop 1 always generated OptoNBs with dark-induced binding, but insertion into loop 6 generated both blue ...purification. After binding YFP to the column, you wash several times to remove non-specific proteins, and then...on the key components of OptoNBs, how they are generated, and their use for protein purification and controlling...chain antibody domain.  How do these components interact? When fused together to form an OptoNB, the AsLOV2...nanobody’s ability to bind its target protein.  Generating OptoNBs The opening and closing of the AsLOV2...over-activated in cancer due to its involved in cell proliferation and differentiation.  Since Ras is a membrane...
  8. Q&A with Karen Katz and Carl Paratore, the Newest Members of the Addgene Board of Directors

    Type
    Blog Post
    Published
    Feb. 19, 2019, 1:36 p.m.
    ...Brookline Interactive. Learn more about Carl Paratore, MBA, CPA Mr. Paratore serves as the General Auditor...Suffolk University Law School and Paratore is the General Auditor at Tufts Health Plan. The addition of Katz...perspective, what do you think are important considerations for the future of open science? What about ...University Law School. Suffolk University graduates on average 20 PhD’s a year and we have a very dominant presence...presence in the biotech sector in both patent law and general life science regulatory law. My role at Suffolk...work at Tufts Health Plan and my role there is general auditor. I oversee a department of 20 individuals...the efficiency and effectiveness of the Plan's operations. We’re looking for those “what could go wrong...
  9. Tips for Technical Support Calls

    Type
    Blog Post
    Published
    Sept. 20, 2016, 2:39 p.m.
    ...made much easier if the interaction between agent and customer is cooperative rather than combatitive.... daydreamed about the ideal customer service interaction - one that gives our customers the most utility...apply to any biology-related customer support interaction. Before contacting customer service In an age...that for you” meme is infamous enough to have generated it’s own tongue-in-cheek website.  If you are ...catalog number ready. I've attempted to answer several emails that start: “Hi! We ordered something from...concern. Please be courteous. We understand how exasperating it can be to lose time and money on a potentially...re going to get. There are questions that are answerable in minutes and questions that could take weeks...
  10. Rabies and Neuronal Tracing

    Type
    Blog Post
    Published
    May 29, 2018, 1:51 p.m.
    ...virus. In general, viral envelopes dictate infection of target cells through their interactions with target... between neurons are what define how the brain operates, and thus, are a major part of the answer to many...individual neurons they infect. However, they generally are not transmitted to adjacent neurons via synapses...monosynaptic tracing was used to examine how adult-generated neurons integrated into the brain over time (Deshpande...This study addressed the question of how newly generated neurons integrate into the complex pre-existing...the functions of these two neuronal populations. Overall, this study laid the foundation for how different...the brain receive inputs and compute outputs. In general, RABV monosynaptic tracing is a powerful tool that...
  11. Mouse Modeling, Part 1: Genetically Engineered Mice

    Type
    Blog Post
    Published
    July 11, 2019, 1:26 p.m.
    ...familiar with before working with mouse models, several common techniques used to create engineered mouse...are then injected into a blastocyst. There are several types of genetically engineered mice: transgenic...gene construct inserted at a specific site. To generate a transgenic mouse, microinjection of DNA or infection...mouse genome. In contrast, knockin strains are generated via homologous recombination. A targeting vector...CRISPR/Cas9-based systems have been developed for generating knockin mice but because CRISPR/Cas9 engineering...However, CRISPR/Cas9 systems are more useful for generating knockout mice. Knockout mice Knockout mice have...during the embryonic stem cell stage using one of several techniques. The longest standing technique is the...
  12. Adenoviral Delivery of CRISPR/Cas9 Aims to Expand Genome Editing to Primary Cells

    Type
    Blog Post
    Published
    Dec. 10, 2020, 1 p.m.
    ...used for many years for in vivo delivery and gene therapy and represent one of the most studied viruses. ...with a packaging capacity of about 6 kb, the 1st generation of AdVs have already a packaging capacity larger...presumably reduce the likelihood that donor DNA will interact with sporadic double-stranded chromosomal DNA ...and very efficient introduction of DNA into therapeutically relevant, non-transformed mammalian cells. ...developed and used AdV vectors to edit genes in several biological systems. It has been used for instance...deficiency (most widely used so far) or for cancer gene therapy such as nonalcoholic steatohepatitis cancer. In...Targeting. In: Applications of viruses for cancer therapy. Elsevier, pp 39–67 Ding Q, Strong A, Patel KM,...
  13. CrispyCrunch: High-throughput Design and Analysis of CRISPR+HDR Experiments

    Type
    Blog Post
    Published
    Feb. 7, 2019, 2:16 p.m.
    ... strongest interaction between the guide and the target and 0 being the weakest interaction due to mismatches...such that weak interactions (e.g., scores <20) are reduced to 0 and strong interactions (e.g., scores ... Zuckerberg Initiative. We hereby announce the general availability of new a tool for CRISPR scientists...project is funded by CZI and the CZ Biohub for the acceleration of science. It's open-source. You can see all...analyses, but it also allows you to download any generated info for your own purposes, or delete the originals...that it can be used in the rank equation above. Generally, the greater this distance between the cut and...sequence inserted by HDR. Although this practice is generally advised, there is little detail published on how...
  14. Hot Plasmids: Winter 2025

    Type
    Blog Post
    Published
    March 11, 2025, 1:15 p.m.
    ...indicator ONE-GO biosensors kit Antibodies for neurodegeneration research   Optimized prime editing in dicots...PE efficiency barrier in tomatoes" by combining several approaches (Vu et al., 2024). Their optimized strategy...applicable to dicot species. In addition, they generated offspring tomato plants that inherited the genomic...single-molecule fluorescence techniques. After generating a series of single- and double-tagged constructs...kinesins KIF5A and KIF5B as well as backbones for generating other SNAPf-, CLIPf-, and CLAP-tagged proteins... a YFP-tagged G protein and a NanoLuc® (Nluc) Luciferase-fused detector that specifically binds to active....01.028. New recombinant antibodies for neurodegeneration research   By Ashley Waldron We recently added...
  15. The AAVantages of AAV in CRISPR Screens

    Type
    Blog Post
    Published
    Feb. 4, 2025, 2:15 p.m.
    ...interrogate immune cells to improve immunotherapy in glioblastoma, and generate programmable screening platforms...vectors: The Rubik’s cube of human gene therapy. Molecular Therapy, 30(12), 3515–3541. https://doi.org/10.1016... vector for gene therapy of human diseases. Signal Transduction and Targeted Therapy, 9(1). https://doi.org... methods — in vivo, in vitro, and ex vivo. The general process of these screens is the same: Deliver ...interest (positive or negative selection). Next-generation sequencing (NGS) to identify genes of interest...your library for each experiment. Additional considerations One of the downsides to using AAV is the limited...Cas12a (Cpf1). Even more creative options involve generating strains of mice that stably express Cas effectors...
  16. A Guide to Starting Your Own Journal Club

    Type
    Blog Post
    Published
    Feb. 6, 2020, 3 p.m.
    ...sequencing (HTS) data we generate and maintain. It became clear that while several people across teams had...enjoy is discussion of current new and exciting literature. As I transitioned out of academia and away from...researchers of all varieties must stay current with literature and emerging technologies to remain competitive...Microbial Pathogenesis that occurred once a week for several months at a time during the spring and fall semesters...club to begin! Figure 1: Discussing next-generation sequencing at the Addgene bioinformatics journal...teams or to stay abreast of current trends in the literature, sampling a breadth of work from a field (perhaps...wandering monologue?  Assuming the feedback is generally positive and the meeting seemed to be of use, ...
  17. Droplet Digital PCR for AAV Quantitation

    Type
    Blog Post
    Published
    Jan. 16, 2020, 2:18 p.m.
    ...droplet quality. Using a droplet generator, the sample and the droplet generation oil are moved through small...within the expected range. We have also found that generating the standard curve for qPCR can be challenging...Pipette slowly If you are using a manual droplet generator, you will have to be careful about transferring...transferring your droplets from the droplet generator to the PCR plate. Maintaining a high droplet count is important...sample. Even if you are using an automated droplet generator, you should avoid pipetting too quickly when making...rate of 2C/s is recommended to ensure an even temperature change among all of the droplets, but you can...recombinant adeno-associated viral vectors." Human Gene Therapy ja (2019). PubMed PMID: 31140327. PubMed Central...
  18. An Introduction to Adenovirus

    Type
    Blog Post
    Published
    Oct. 3, 2023, 1:15 p.m.
    ... Adenovirus Vectors for Gene Therapy, Vaccination and Cancer Gene Therapy. Curr Gene Ther, 13(6), 421–... anecdote goes toward saying that host-virus interactions are an important part of the biology of adenoviruses... the commercial market). Although host-virus interactions likely seem important for any virus, we will...initiating the whole process – such as the viral DNA polymerase – it makes sense that vectorization strategies...oncolytic virus in addition to standard uses in gene therapy and in basic research, like other viral vectors...PMID: 31749409. Harrach, B. (2014). Adenoviruses: General Features. In Reference Module in Biomedical Sciences...novo viral gene expression: Implications for gene therapy. Proc Natl Acad Sci U S A, 95(19), 11377. https...
  19. Supporting Rare Disease Research with BeHeard 2017

    Type
    Blog Post
    Published
    July 20, 2017, 2:30 p.m.
    ...disease. This work will hopefully accelerate the development of targeted therapy for peritoneal mesothelioma...learn how plasmids from Addgene will be used to accelerate rare disease research and provide hope to patients...which disruption of the smn1 gene results in the degeneration of spinal cord motor neurons. This disease is...using C. elegans as a model to identify SMN1 interacting partners and perform whole animal screens for...for small molecules that block the neurodegenerative effects of smn1 disruption. As part of his work in...will use Addgene plasmids to characterize smn1 interactions with other genes. He will use fluorescent proteins...of the molecular biology behind SMN1 and its interaction partners, Dr. Di Schiavi will be able to better...
  20. The Michael Davidson Collection: One-Stop Shop for Fluorescent Proteins

    Type
    Blog Post
    Published
    July 29, 2014, 6:16 p.m.
    ...markers all tagged with mEmerald. Plasmids to monitor protein-protein interactions through multicolor labeling...scale: Look at the mEmerald variants first, followed by the color variants. The mEmerald plasmids offer a...biology, seeing what interacts with what, what affects what. It's like fixing a Maserati. If we know how all...Fusion Proteins - Making the Right Connection.  mEmerald plasmids and many more! Baird has a helpful tip...the Davidson lab always tagged new proteins with mEmerald first, Baird says. From F-Actin to mitochondria... memerald...
Showing: 181 - 200 of 822 results