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...transfection protocol Fluorescence Titering Assay for Lentivirus Quantify virus using fluorescence measurements...designed to help you get started in the lab. Name Description (Link opens in a new window) Link to Video Personal...blocks for many more complicated procedures. Name Description (Link opens in a new window) Link to Video Making...constructing and analyzing your plasmids. Name Description (Link opens in a new window) Link to Video Restriction...titering and testing your virus preparations. Name Description Link to Video General Transfection Introduce ...Protocols for common antibody applications. Name Description Link to Video Transfection Introduce plasmid ...

...This protocol describes the basic steps for lysing cells, determining total protein concentration in ...specific to the protein of interest. This protocol describes the basic steps for lysing cells, determining ...Nonfat milk powder 96-well microtiter plate Chemiluminescence substrate Plastic wrap Primary antibody Secondary... at RT on a shaking platform. Prepare the chemiluminescence substrate by mixing 1:1 reagent A to reagent...reagent B. Gently incubate the membrane in the chemiluminescence reagent for 5 min at RT . Cover the membrane...with clear plastic and use a gel imager with chemiluminescence detection or a dark room to detect the bands...

...This protocol describes how to generate a monoclonal cell line from a polyclonal pool of stable cells...Protocols Viral Service Introduction This protocol describes how to generate a monoclonal cell line from a ...type will be able to grow under the conditions described in this protocol. Conditioned medium (details ... specific conditions used. Each 96-well plate described in this protocol could, in theory, give rise to...protocol was performed at Addgene on the A549 cells described in our sample data , each 96-well plate gave rise...from Feng Zhang (Addgene plasmid #52962 ) and is described in Improved vectors and genome-wide libraries ...

...amplification of CRISPR pooled plasmid libraries in Escherichia coli cells....amplification of a pooled-plasmid library in Escherichia coli cells. Pooled libraries contain tens to ...activating pulse and follow all specifications described in the equipment manual. Immediately add 1 mL ...µl aliquots of cell/DNA mixture used (8 in the described protocol) using a new vented falcon tube for every...different concentrations of DNA. In our hands fluorescent dye methods tend to report lower values than ...

...Protocols Viral Service Introduction This protocol describes a general method for transfecting mammalian cells...with fresh media Day 3 or more (am): Observe fluorescence, harvest cells, or perform your experiment Equipment...batch of PEI is prepared, transfect cells with a fluorescent plasmid using a variety of ratios. Check the ...efficiencies as can be seen here by the amount of green fluorescent protein expression (green in the right panels...

...procedures. (Link opens in a new window) Video Link Description Related Page Making LB Agar Plates Create plates...resources. (Link opens in a new window) Video Link Description Related Page MTA Guide - Requests Your guide ...Addgenies! (Link opens in a new window) Video Link Description Jessica Welch, PhD In this first installment ...

...This protocol describes how to run an indirect ELISA against a purified antigen to demonstrate the expected...Protocol Antibody Guide Introduction This protocol describes how to run an indirect Enzyme-Linked ImmunoSorbent...antigen to validate an antibody. This protocol will describe how to create a standard curve using known concentrations...

... Colony Formation Titration Assay Lentivirus Fluorescence Titration Assay AAV Titration by qPCR Addgene...Guide Virus Blog Posts Introduction This protocol describes how to use droplet digital PCR (ddPCR) to titer...and titrations Reference Wang Y, Bergelson S, Feschenko M. Determination of Lentiviral Infectious Titer...

... Bacterial Culture Introduction This protocol describes methodology for plating antibiotic over-agar for...transformation protocol. Plate 50 µL of transformed E. coli /rescue media suspension onto the agar and gently spread...

....9kb stuffer, visit www.addgene.org/10878/ . Description Vector Element U6 Human U6 promoter drives RNA...the pLKO.1 TRC-cloning vector. Addgene Plasmid Description pLKO.1 – TRC control Negative control vector ...license or rights of access or use to the materials described in the literature. The distribution of materials...

...bath on and set the appropriate temperature as described in your protocol. How to set the temperature will...water bath even if you are using disinfectants as described above in step 3. You will also need to maintain...

...This protocol describes how to affinity purify recombinant antibodies from cell culture supernatant using...Western Blot Protocol Introduction This protocol describes how to affinity purify recombinant antibodies ...

...exchanging the fluorescent donor for a bioluminescent donor, making BRET probes. Here the bioluminescent donor ...NLuc to fluorescent proteins to make better reporters and the second couples NLuc to fluorescent proteins...better biosensors. NanoLuc®-fluorescent protein fusions for imaging Fluorescent proteins are fantastic imaging...more penetrative orange fluorescent protein fusion (OgNLuc). Both fluorescent proteins can be excited ...transfer of energy from one fluorescent protein to a compatible fluorescent protein. FRET can be measured...activation of other fluorescent probes but can still transfer energy to the fluorescent protein acceptor....these tools, NanoLuc-fluorescent protein fusion shifts NLuc’s bright blue luminescence to wavelenghts more...

...such as fluorescent microscopy must be used. To learn more about the most suitable fluorescent microscopy... have a variety of fluorescent light sources. When interrogated with a fluorescent light source, a cell...conjugated fluorophores Fluorescent antibodies get around the challenges of fluorescent protein fusions by ...laser and interrogated with various visible and fluorescent light sources that allow users to assess a cell... cells in a population in a procedure termed fluorescence activated cell sorting or FACS (2). By analyzing...for your study see Addgene’s blog post Which Fluorescence Microscopy Techniques is Best for Me?  An overview...particular surface receptor are stained with a fluorescent antibody against the receptor and analyzed on...

...chromoproteins, fluorescent proteins, and luminescent proteins. While fluorescent proteins and luminescence have ...is full of striking visuals from fluorescent jellyfish, bioluminescent phytoplankton, and colorful corals...from fluorescent proteins? Before going into the difference between chromoproteins and fluorescent proteins...the widely used green fluorescent protein (GFP) gives a bright green fluorescence when exposed to blue ...light, whereas chromoproteins do not fluoresce at all or fluoresce at very low levels. Chromoproteins in...for instrument-free detection. Unlike fluorescence or luminescence, which require UV lamps, fluorometers... chromoproteins are actually a subset of the fluorescent protein family. What sets them apart is the way...

... blog Fluorescent Proteins 101: Fluorescent Biosensors Resources on Addgene.org Fluorescent protein...area with lots of bright new plasmids is our Fluorescent Biosensors Collection — scientists are always...measure! Let’s take a look at some of the hottest fluorescent biosensors new to Addgene this year. Feel the...Hiroshi Hibino and colleagues devised a “Modular fluorescence unit fused with TRansmembrane region-to-IntrAcellular...region-to-IntrAcellular loop linkers” (MTRIA for short), where a fluorescent protein is inserted into one of the loop regions...  Find MTRIA sensors here!   Ino D, et al. A fluorescent sensor for real-time measurement of extracellular...a new preprint, Jared Toettcher and colleagues describe pYtags, a modular system for monitoring specific...

...than any fluorescent protein earlier described. “Until our proteins, there were lots of fluorescent proteins...increase their fluorescence upon illumination with far-red light. As the researchers described in Nature Communications... If you start poking around on Addgene’s Fluorescent Protein Guide to In Vivo Imaging, you’ll pretty ...good reason. We all know scientists have used fluorescent proteins to observe what’s happening inside cells... of decades. Green is the classic color, but fluorescent proteins are available in a variety of hues. ...unimpeded. The challenge then was to develop fluorescent proteins that would fall within that near-infrared... from jellyfishes and corals, but all of them fluoresce outside the transparency window of mammalian tissues...

...More about Fluorescent Protein-Based Tools Learn Some of the Pitfalls When Using Fluorescent Proteins Control...Resources on Asddgene.org Find Fluorescent Protein Plasmids Find Fluorescent Protein Kits Find Empty Backbones...historically been difficult, as techniques like fluorescent in situ hybridization (FISH) and chromosome capture...be used in vivo. Some researchers have used fluorescently tagged DNA-binding proteins to label certain...chromosome. This image represents the composite of fluorescent measurements from red, blue, and green channels...targeting capacity. By using a gRNA to target fluorescently labeled dCas9 to a given genomic locus, you ... thereby decreasing the amount of background fluorescence from unbound GFP-dCas9. With these improvements...

...simultaneously acquired from the the fluorescent and luminescent siganls and a ratio is calculated (the...26456817. Nano-lanterns for multicolor luminescence imaging  Fluorescent imaging techniques have become indispensable...visualization of single molecules via targeted fluorescent molecules. The Vale lab and the Weissman lab ...protein of interest are recognized and thus fluorescently labeled by scFv antibodies fused to sfGFP. This... This system amplifies the intensity of fluorescence signal and enables tracking of single molecules within... plasmids to increase the brilliance of your fluorescent signal and endogenous activation of your target...Dec;11(12):1261-6. doi: 10.1038/nmeth.3147. Bioluminescent pH sensor Understanding intracellular pH regulation...

... of fluorescent fusion protein with your gene of interest: Plasmid Color Expression Description pPROEX... filters chosen for the donor fluorescence and the acceptor fluorescence. Additionally, this method could... the fluorescence decay time of the donor. When FRET occurs between the pairs, donor fluorescence is quenched...factors, such as pH or autofluorescence background, can change the fluorescence decay time and have to...Master. Note: BRET= Bioluminescence Resonance Energy Transfer CRET= Chemiluminescence Resonance Energy Transfer...course talking about the now well-known FRET, aka Fluorescence (Förster) Resonance Energy Transfer, technique...: the acceptor photobleaching method and the fluorescence lifetime imaging microscopy (FLIM) method. Acceptor...

...a magnetoresponsive fluorescent protein. Controlling an optogenetic or fluorescent tool with magnets would... do fluorescent proteins respond to magnetic fields?” and “What are magnetoresponsive fluorescent proteins...set out to do just that — by developing a new fluorescent protein tool that responds strongly to magnetic...Motivated by curiosity Although a wide range of fluorescent proteins and optogenetic tools exist, humans ...Maria were encouraged by previous reports that described magnetic responses of cryptochrome proteins or...EGFP — showed a slight but detectable change in fluorescence when a small magnet was passed over the sample...sample (Frank Hayward et al., 2024). The fluorescence intensity decreased whenever the magnet approached...

...the ligand exhibits low fluorescence when free in solution, but high fluorescence upon binding to its cognate...improvement of fluorescent proteins makes them the go-to choice for many (if not most) fluorescence microscopy...Protein Tags Catch Up on Your Fluorescent Protein Background Which Fluorescent Protein Should I Use? Resources... long live chemistry! The discovery of green fluorescent protein (GFP) sparked a renaissance in biological...fusions on their own. Subsequent advances in fluorescent proteins have replicated many of the properties...the photon budget and pushing the frontiers of fluorescence microscopy often requires more photons. For ...Poor photon budgets are a widespread issue with fluorescent proteins—even the thriftiest cell biologist can...

... and identified that a S375A mutation in RESCUE (named RESCUE-S) offered ~76% on-target C-to-U editing... edies by ~94% compared to RESCUE.   Addressing the potential use of RESCUE in therapeutic applications...editing ability in a RESCUE system small enough for viral delivery.  Find the RESCUE RNA editing plasmids...paper on an RNA editor that allows C to U edits (RESCUE). We’ll walk through how these tools were developed...point mutations in RNA which could recapitulate or rescue known pathogenic alleles, or introduce a premature...ADAR2DD, not PspCas13b. Find the plasmids for the RESCUE RNA editors here! Testing and improving RNA editing... 20. Expanding RNA Editing Capabilities through RESCUE Two years later, the Zhang lab expanded the RNA...

...intrinsically fluorescent and can be detected with highly epitope-specific, fluorescently-labeled antibodies...usually provided by red fluorescent proteins such as tdTomato or RFP or blue fluorescent proteins like Cyan... and David W. Piston. "Fluorescent protein tracking and detection: fluorescent protein structure and color...tracers Neuronal tracers such as epitope tags and fluorescent proteins (FP) have also been important in mapping...streptavidin-binding strep-tag and, more recently, OLLAS (Escherichia coli OmpF linker and mouse langerin) and Sun ...compared to epitopes tags, FPs are intrinsically fluorescent and can therefore be used in live imaging experiments...tracer With the limitations of epitope tags and fluorescent proteins, it has been crucial to develop new ...

...classes of reporters: chemiluminescence enzymes and fluorescent proteins. Chemiluminescence enzymes are cheap...antibodies conjugated to fluorescent proteins, instead of the more common chemiluminescent methods for detection...agents. Chemiluminescence kits When activating your enzyme, make sure to choose a chemilumescence kit appropriately...amount of protein you are expecting.  Fluorescent proteins Fluorescent proteins, while more expensive, allow...detection (though the enzymes used for chemiluminescence can be conjugated to primary antibodies). Direct ...you to optimize for smaller proteins or lower fluorescent backgrounds. However, PVDF does add a few (short...multiplexing, and the solutions used to provide the chemilumescence may be light-sensitive. They also have a poor...

...inhibitory synaptic proteins Fluorescent protein system for C. elegans Fluorescent timers for studying cell...Split-wrmScarlet, a fluorescent proteins system for Caenorhabditis elegans By Jennifer Tsang Fluorescent proteins...are not fluorescent on their own. When the two fragments come together, they fuse and fluoresce. The team...neurotransmitters. Using genetically encoded fluorescent proteins coupled with Fibronectin intrabodies...localize to the synapse and minimize extraneous fluorescence from other regions of the cell. By combining...combining vectors expressing different fluorescent proteins targeting inhibitory or excitatory synapses or that...Predicting cell cycle length with a histone-fused fluorescent timer By Kate Harten DeMaio Studies of the cell...

...insertion that disrupts fluorescence due to a frameshift. Restoration of fluorescence can only occur through...mCherry expression. Cells can then be sorted using Fluorescence-activated cell sorting (FACS) and the editing...restoration of a frame-shift in mCherry that restores fluorescence to monitor APOBEC-Cas-9 mediated editing. eGFP...individually mutated three codons in eGFP to eliminate fluorescence. This created three inactivated eGFP reporters...the APOBEC-Cas9 editosome would restore eGFP fluorescence, making it easy to quantify single base editing...mutations in eGFP that results in the restoration of fluorescence. Transient reporter for editing enrichment (...Standage-Beier et al. 2019). TREE is a real-time, fluorescent based identification system for the isolation...

...cleaves the supplied fluorescently labelled ssDNA substrates. Upon cleavage, the fluorescence is no longer quenched... cleavage of fluorescently labelled RNA, the authors employ a P51 cardboard fluorescence visualizer that...streptavidin portion of the probe via biotin. The fluorescent portion of the probe that is cut will continue...and released when cleaved. Cleavage results in fluorescence and this approach can be incorporated into a...recombinase, and the ssDNA-FQ reporters that exhibit fluorescence upon cleavage. Upon amplification by the RPA...cleavage of the ssDNA-FQ reporter resulting in fluorescence. Cas12a binds all the amplified target regions...cleavage of the ssDNA-FQ reporter. The resulting fluorescence can be observed under either no excitation light...

...R26R-Confetti described in Hugo J. Snippert, et al. (2010) and the MAGIC Marker strategy described in Karine...cells. The Brainbow-1.0 construct contains three fluorescent proteins: RFP (red), YFP (yellow) and M-CFP (...recombination. Brainbow-1.1 scales up the system to four fluorescent proteins, with recombination events specified...but the principles remain the same. The first fluorescent protein in the construct, OFP (orange), is expressed...two tandem invertible segments, each with two fluorescent protein coding sequences in opposite orientations...expressed; once Cre is removed from the system, the fluorescent protein whose coding sequence is closest to the...Brainbow mouse tissue was challenging due to low fluorescence intensity, caused partially by fluorophore photoinstability...

...years — a green fluorescent protein, a red fluorescent protein, a fancy new green fluorescent protein, some...new-and-improved fluorescent protein you want to try, just swap in a new fluorescent ligand and see the...purification tags, another version with that same red fluorescent protein somebody made because they forgot it ...of chemical dyes provide many advantages over fluorescent proteins, opening up new applications.   ...biarsenical dyes such as FlAsH (green, based on fluorescein) or ReAsH (red, based on resorufin). SNAP-tag...dihydrofolate reductase (eDHFR) could be labeled with fluorescent derivatives of its substrate trimpethoprim (TMP-tag...typically both brighter and more photostable than fluorescent proteins (often up to 10-fold more). So, labeling...