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Showing: 61 - 80 of 651 results
  1. TALEN Guide

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    ...Finger Consortium Originally published in Addgene's December 2011 Newsletter Overview of TALEN Technology Imagine...can be made. Intuitively, one would expect that assembling relatively small, repeat-laden DNA regions into...from the University of Minnesota, arrays can be assembled in a matter of days. In an open access Nucleic...recently developed Golden Gate cloning method to assemble “multiple DNA fragments in an ordered fashion ...custom arrays consisting of 12-31 repeats can be assembled and inserted into a variety of backbones in just... in August, uses a serial ligation protocol to assemble arrays. Dr. Joung, co-founder of the Zinc Finger...early in 2011 and they described their kit for assembling TAL effector arrays in a 2012 issue of Nature...
  2. Transferable Skills Guide: Teamwork

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    ... Team, but I’m also an emeritus member of the Scientist Team, a member-by-association of the Development...at Addgene, an unofficial title that I happily embrace (and admittedly, I may have started that nickname...update how we make and distribute kits, I helped assemble a crack team of Addgenies that includes: Michelle...control efforts with depositors; Gizela, the lab member who knows how the physical kits are made and shipped...months, or even a few weeks. The important thing to remember is that every team should have a goal, or at the...and providing technical customer service. Team members are highly trained, and though there are necessary...particular function. Project team A Project Team is assembled to complete a series of tasks with precisely defined...
  3. Deep Dive: Fixing and Permeabilizing for Immunofluorescence

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    ...and membrane integrity (Fig. 2). For example, saponin interacts with cholesterol in cell membranes and...can lose membrane-associated proteins, but it is better at permeabilizing organellar membranes. Created... work is to try it. As you embark on your next IF adventure, just remember that even though these early...proteins that need a little help crossing cell membranes as they are not able to diffuse across natively...Permeabilization essentially punches holes in the cell membranes of your sample to allow antibodies better access...target is already on the extracellular side of the membrane, then this step may not be necessary. In fact,...and leaves many membrane-associated proteins in place. In contrast, Triton X-100 and Tween-20 are examples...
  4. Fluorescent Protein Guide: Biosensors

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    ...measurements of membrane charges A FRET sensor enables quantitative measurements of membrane charges in live...2+ Dynamics in the Mitochondrial Matrix and Intermembrane Space with the GZnP2 Sensor. ACS Chem Biol. ...sensor iATPSnFR1.0 and iATPSnFR1.1 (cytoplasmic, membrane-displayed, expression in neurons, astrocytes) ...reduced ph interference demonstrates augmented transmembrane chloride movement by gerbil prestin (SLC26a5...2020 Aug 4;11(1):3881. Adam Cohen Chloride (Cl-) Membrane-targeted biosensor for monitoring changes in intracellular... intracellular chloride A sensitive membrane-targeted biosensor for monitoring changes in intracellular...HyPer7 Caveolae sense oxidative stress through membrane lipid peroxidation and cytosolic release of CAVIN1...
  5. Antibodies 101: The Basics of Western Blotting

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    ...Immobilizing proteins on a membrane Once separated, the proteins are immobilized onto a membrane, usually composed...sticky areas on the membrane will bind to the proteins in the buffer, blocking the membrane  from binding to...are: (1) separated by size, (2) transferred to a membrane, and  (3) detected using antibodies.   ...protein is separated in a gel, transferred to a membrane, stained with antibodies, and finally visualized... and high binding capacity. In addition, PVDF membranes can be repeatedly stripped of an antibody and ...follow the same general principle where the gel and membrane are “sandwiched” together with blotting paper ...proteins to migrate out of the gel and attach to the membrane.  In a wet transfer system the sandwich is completely...
  6. MXS Chaining

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    ...2008 Gibson Cloning Gibson assembly method Single reaction, can assemble large DNA sequences, no restriction...derived from the tyrosine-protein kinase Lyn) Membranes 3 mCherry 587nm/ 610 nm human β-Actin Actin ...same multiple cloning site (MCS). Modules are assembled one at a time by standard restriction enzyme digestion...upon ligation. As a result, once two modules are assembled next to each other, a third module cannot be placed...high-throughput cloning strategies available for assembling these modular types of constructs, and different... Golden Gate Type II restriction enzymes Can assemble up to 10 modules in a single step. Through iteration...restriction enzyme-based). Well suited for the modular assembly of highly similar or repetitive sequences. Intermediate...
  7. 27 Hot Plasmids from 2016

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    ...introduced a new assembly cloning platform called GMAP (Gibson assembly-based modular assembly platform). GMAP...Plasmids from:  March (Q1) | June (Q2) | September 2016 (Q3) | December 2016 (Q3) MARCH 2016Enhancer activity...GMAP is based on the Gibson Assembly method, which allows for easy assembly of DNA fragments by utilizing...streamlines the assembly of TALE repeats into a single-tube, 3 day process by utilizing pre-assembled trimers ...literature searching, DNA synthesis, and plasmid assembly. Luckily, researchers from Douglas Densmore’s ...Genomics. 2015. PubMed PMID: 26165496 GMAP - A new assembly platform for generating both simple and complex...overlaps). To expand the capabilities of Gibson assembly and make a more modular platform, the Jacks lab...
  8. Tagging Optogenetics and Chemogenetics Receptors: Fluorescent Proteins and Other Options

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    Blog Post
    ...only a small proportion were found on the plasma membrane (top panel in Fig. 1). Of course, this was problematic...DREADD receptors need to be located on the plasma membrane to be activated by the DREADD actuator after it.... Although we found a larger proportion on the membrane in mice neurons, most of them were still cytoplasmic...limited expression of hM4Di‐mCherry at the plasma membrane in monkey neurons, we next hypothesized that a...improve the transport of this DREADD to the plasma membrane. The haemagglutinin (HA) tag is a small 9 amino...resulted in abundant expression of hM4Di in plasma membranes in both species (bottom panel in Fig. 1). Our ...transgene of interest and its localization in the membrane. The lesson we learned from these studies is that...
  9. A Look at Addgene's QC Process

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    ...following sequencing and assembly. In cases where the QC team suspects an assembly issue, they manually revisit..., de novo assembly in Geneious can still provide additional insights to resolve the assembly and determine...Illumina MiSeq*. The raw sequencing reads are assembled into a circularized plasmid sequence de novo (...bioinformatics pipeline developed at Addgene. The assembled plasmid sequence is then compared to the information...confirm:  The size of the plasmid to ensure our assembly result is accurate The gene/insert or any major...additional considerations to resolve. Sequencing and assembly issues Sequence discrepancies are not always a... can arise due to errors in the sequencing and assembly pipeline. There are regions of plasmids that are...
  10. Sonic Hedgehog? Sleeping Beauty? Learn About the Genes Behind Addgene’s Conference Room Names

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    ...on the surface, giving the embryo a “spiny and prickly look” that resembled a hedgehog (Nusslein-Volhard...eyes. Scientist thought these thick “eyebrows” resembled those of the comedian Groucho Marx, so the gene...Institute! Sonic Hedgehog, an important regulator of embryonic development The largest conference room at Addgene...hedgehog exhibit abnormal segmentation during embryogenesis. Typically, regularly spaced denticles (bristles...bristles) outline the segments of the Drosophila embryo. In flies with non-functional hedgehog, the denticles...gradient exerting a different effect on the developing embryo depending on its concentration. Genetic mutations...mutant fly ovaries had “squiggly” actin fibers that resemble spaghetti. We have two plasmids in our inventory...
  11. Making CRISPR Plasmids Using Fragmid

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    ... option: Fragmid. Fragmid is a modular vector assembly process designed for a quick, plug-and-play approach...depositor John Doench reports even the greenest members of his lab, high school interns, were able to use...five days. Did you say… easier? Fragmid’s modular assembly structure takes a lot of the design work out of...  Once you have the components you want, simply assemble them into a destination vector via Golden Gate...Whatever individual components you choose will assemble in the expected module order. (It’s also why you...the Fragmid system by sequencing 60 individual assemblies created over five months. When they tested those...were perfectly correct. Because they created the assemblies in duplicate, they were able to confirm that ...
  12. How-to: 5 Steps to a Great Panel Discussion

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    Blog Post
    ...uninteresting, the panel members all say the same thing and one panel member dominates the discussion?... no time for audience questions and an audience member asks a 5 minute question that is really a speech... a fun discussion. People are much better at remembering these things on a relaxed phone call than when...moving and to prevent any one panelist or audience member from taking over. My own personal rule is that ... get things started. Give a couple of audience members a chance to participate. For example, at a recent...nonprofit science organizations, I asked audience members to stand and describe unique nonprofit models that...in the audience. I always try to meet audience members before a panel discussion and often incorporate...
  13. Plasmids for Stem Cell Research

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    ...pluripotency during embryonic development. This “reprogramming” of the cell to an embryonic state holds immense...cell lineages. Pluripotent stem cells, such as embryonic cells, can potentially give rise to any other ...limited to related cell lineages. Pluripotent embryonic and multipotent adult stem cells have been studied...removes the possible ethical concerns related to embryonic stem cell use and has the major advantage that...Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors...Mouse Direct Reprogramming of Fibroblasts into Embryonic Sertoli-like Cells by Defined Factors. Cell Stem...via microRNA-dependent and -independent pathways. EMBO Mol Med. 2017 Aug;9(8):1117-1131. Parmar Fibroblasts...
  14. Plasmids 101: Modular Cloning Applications and Kits

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    ...Modular cloning is a popular DNA assembly tool used to build single- and multi-gene constructs for a ...is. MoClo background MoClo is a clever way to assemble several DNA parts in a specific orientation using...are reusable, saving time and money on future assemblies. If you are new to MoClo, give our MoClo 101 ...Kit has a wide array of DNA parts that can be assembled into individual TUs or very large (up to 20!) ...CIDAR offers a one-pot reaction wherein multi-part assembly can occur. It is quite extensive with a supplemental... most intuitive CRISPR MoClo application is to assemble multiple unique sgRNAs into a multi-TU targeting...save time and money on studies that require many assemblies or that compare the effects of different DNA ...
  15. Antibodies 101: Beyond Surface Labeling

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    ...diffuse through the cell membrane freely, while others require a permeabilized membrane to enter cells. Depending...Depending on the application, they can be membrane-permeant or membrane-impermeant, and the cells of interest...viability dyes are membrane-impermeant and can only enter cells with compromised plasma membranes — i.e., dead... The targeted epitopes can be motifs within transmembrane proteins, such as receptors, or post-translational... marker of interest is not located on the cell membrane but inside the cell. Due to their chemical nature...nature, antibodies cannot penetrate the cell membrane; hence, intracellular labeling with antibodies requires...Permeabilization, as the name suggests, perforates the cell membrane to allow for antibodies to enter the cell (Figure...
  16. Generating Mouse Models Using CRISPR/Cas9

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    ... would be injected into developing mouse embryos, the embryos allowed to develop into chimeric mice (with...would first introduce a mutation into a mouse embryonic stem cell (ESC) line, enrich and select for cells...fascinated by CRISPR and rushed to test it. I still remember the day, March 16, 2014, that I got my first preliminary...Streptococcus aureus, is as effective at editing mouse embryos as Cas9 from S. pyogenes and has the advantage ...of fertilized mouse eggs. Or, to avoid handling embryos ex vivo, the components can be electroporated into...Doench’s gRNA design blog post. Finally, always remember that you are working with RNAs, which are prone...payload! Last but not least, when using CRISPR, remember to appreciate the fact that it was first discovered...
  17. Viral Vectors 101: Voltage Indicators

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    .... They can be targeted to the plasma membrane to measure membrane potential and can also be directed to... the membrane), the voltage sensing component (i.e., rhodopsin naturally resides in the membrane), or ... want to monitor the voltage change across the membrane of cardiac cells. Similarly, neuronal signaling...sensors contained a FP that localized to the plasma membrane due to the addition of several targeting domains...compound that distributes itself within the plasma membrane as well. Another flavor of these tools is Voltron...more lipophilic, increasing its affinity for the membrane, where it will then localize and emit signal from...generate without disturbing the integrity of the membrane, a concern with several of the previously described...
  18. When is a Monomer not a Monomer? The Top Three Ways Your Favorite Fluorescent Protein Oligomerizes in Cells

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    ...contacts that bring apposing membranes together and can wrap the membranes into stacked structures including...dimerization.   1. Transmembrane fluorescent protein fusions Transmembrane proteins, i.e. receptors...they cannot tumble in 720°, i.e. they are on a membrane or in an organelle, then their effective concentration...dimerizing fluorescent proteins is illustrated. 1) Membrane proteins fused to FPs that dimerize can form dynamic...integrated into lipid bilayers. Fusion of an FP to a transmembrane protein significantly increases the effective...other. The consequences can be dramatic. For a membrane POI localized to the endoplasmic reticulum, the...tubules can be grossly distorted into dense stacked membranes termed Organized Smooth Endoplasmic Reticulum ...
  19. Antibody Guide

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    ...Transfer proteins from the gel to a membrane. Incubate the membrane with an unconjugated primary antibody...block the membrane to remove excess antibody and prevent unwanted binding. Incubate the membrane with a ...Wash and block the membrane. Activate the HRP with a substrate kit. Image the membrane using either X-ray...tears, saliva, mucus) where it protects mucosal membranes Dimer with a valency of 4 IgA1; IgA2 IgD Coexpressed...short peptide linkers. Diabodies can be used for assembling protein nanostructures. Figure 2: An antibody...recognizes your primary antibody source species. Remember that recombinant antibodies will also have a source...
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