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...the process of correcting spillover from one fluorescent channel to another. When you label your samples...samples with multiple antibodies, the fluorescent probes on the antibodies may have similar emission spectra...spectra, meaning they will emit fluorescent light at similar wavelengths (See this handy emission spectra...spectra). Your cytometer will therefore record the fluorescence for both at similar levels, meaning that your...desired cell population. By compensating between fluorescent channels, you can correct for this spillover ...your flow panel, you will need to know both the fluorescent markers you intend to use and your cytometer’... the laser configuration. In general, if two fluorescent markers are read by the same laser, they will...

...cre-dependent version at Addgene! Fluorescent protein and control AAV These fluorescent protein expression vectors...exhibits high contrast between peak fluorescence and resting fluorescence. It is useful for activity imaging...exhibits high contrast between peak fluorescence and resting fluorescence.  It is useful for activity imaging...pGP-AAV-syn-FLEX-jGCaMP7b-WPRE) exhibits the brightest resting fluorescence of the GCaMP7 family of calcium sensors and ...the endoplasmic reticulum, but exhibits larger fluorescent responses to GABA. Find the iGABASnFR and its...the control vectors for experiments encoding a fluorescent-tagged molecular tool.   Find pAAV-FLEX-tdTomato...of densely labeled neurons because background fluorescence from inactive neurons is reduced. 105322 ...

...cyan-excitable red fluorescent protein (mCyRFP1). Derived from cyan-excitable organge fluorescent protein (CyOFP1...as a donor in FRET (fluorescence resonance energy transfer) and FLIM (Fluorescence Lifetime Imaging Microscopy...Segment on This New AAV Tool    mCyRFP1: Novel fluorescent protein that enables imaging of two biosensors...to that of CyOFP1, a large stokes shift, long fluorescence lifetime, and a stable monomeric form as determined...mCyRFP1 Podcast Segment New bright monomeric red fluorescent protein - mScarlet! The Dorus Gadella lab has...has recently developed a synthetic red fluorescent protein variant they call mScarlet. Bindels et al used... libraries of new RFP variants for increased fluorescence, brightness, and proper maturation. Three new...

...generate a fluorescent output, which will turn on, change color, or change intensity of fluorescence in the...Epigenetics with a FRET Based Biosensor Fluorescent Proteins 101: Fluorescent Biosensors ...and the receptor, but readouts could involve fluorescence, pH change, heat, etc. The last component of...readout for whatever the bio-recognition event is (fluorescence, pH, etc.). The transducer will generate a numerical...   Neurotransmitters Many canonical fluorescent as well as FRET-based biosensors have been engineered...the ADP:ATP ratio. Most of these sensors are fluorescence-based and have been optimized for a wide-range.... Physiological factors Unlike the previously described sensors, this class measures either factors as...

...relies on the fluorescence ratio between the 2 fluorophores, rather than on the fluorescence intensity, ...thoughtfully designed plasmid components with Fluorescence Activated Cell Sorting (FACS), allowing for .../doi.org/10.1101/2020.05.04.076067    Novel fluorescent enzyme biosensors provide direct, specific and... Claudia Vickers’s lab has designed novel SL fluorescent biosensors by integrating a SL-insensitive fluorophore...SL-sensitive fluorophore (circularly permuted green fluorescent protein or cpGFP) to the petunia SL enzymatic...conformational change of the receptor which modulates the fluorescence intensity of the cpGFP without altering that... authors also showed that the receptor-based fluorescent biosensor has a high sensitivity (50 nM-500nM...

... Matter Expert/ Product Development Manager at eScience Labs. To learn how Caitlin got into scicomm and...interview. Caitlin Runne-Janczy’s first day at eScience Labs was not your typical first day. “I walked...started out as a subject matter expert (SME) at eScience Labs, an educational company that creates hands-on...from start to finish?’" says Caitlin. SME’s at eScience Labs also write test question banks, case studies...individual needs of schools interested in using eScience Labs as part of their curriculum by either taking...about unique topics that aren’t already offered by eScience Labs.  “We work with faculty members to make sure...collaborates with the sales and operations departments at eScience Labs. This can involve traveling with the sales...

...be detected via loss of luminescence.     B.1.351 variant neutralization escape The lab saw that the B... compared to the wild-type, escaped neutralization. “That degree of escape from a very small number of... T, Sigal A (2021) Escape of SARS-CoV-2 501Y.V2 from neutralization by convalescent plasma. Nature 593...assay. Neutralization was quantified in terms of luminescence. Image from Garcia-Beltran et al., 2021 with...what was surprising was the extent to which the escape appeared to be happening.”  In their assay, the...  Figure 3: Neutralization outcomes of convalescent sera with various pseudotyped virus. Image from..., Balazs AB (2021) Multiple SARS-CoV-2 variants escape neutralization by vaccine-induced humoral immunity...

...lab fused a fluorescent protein to the hybrid anti-HA scFvs. The addition of the fluorescent protein allows...to amplify fluorescent signals in in vivo imaging: the 10xHA tag increased the fluorescent signal to noise...protein turnover Download the fluorescent protein eBook Browse our fluorescent protein blog posts Resources...Read our fluorescent protein guide Find plasmids for subcellular localization Find fluorescent protein ... part epitope binding region, all fused to a fluorescent protein. “Frankenbody,” like the infamous frankenstein...as living neurons, and can be fused to other fluorescent proteins and tags including mCherry, HaloTag ...

... a Monomer? The Top Three Ways Your Favorite Fluorescent Protein Oligomerizes in Cells GFP oligomerization...Janelia Research Campus reminds us that, although fluorescent proteins are incredibly useful, chemical fluorophores...Detect Zika Virus The RNA-based toehold switches described in this post are engineered to bind RNA sequences...Boston University School of Medicine, this post describes a tool you can use to study basic virus biology...researcher in the Silver Lab at Harvard University, describes R-bodies, “force generating protein machines that...to different pH’s and some that are fused to fluorescent proteins. She also showed that R-bodies can rupture... Connie Cepko’s Lab at Harvard Medical School describes how AAVs function and indicates important things...

...about other Fluorescent Biosensors A Practical Approach to Choosing the B(right)est Fluorescent Protein Visit...Visit the Fluorescent Protein Featured Topic Page Resources at Addgene.org Find Fluorescent Protein Biosensors...conformational changes lead to an increase in fluorescence intensity from the inserted GFP. After characterizing...expression levels in bacteria and produces stronger fluorescent signals upon sensing glutamate in mouse and ferret...higher expression levels and produce stronger fluorescent signals upon sensing glutamate using both 1-photon... Biosensors Browse All Fluorescent Proteins Find AAV Tools References Marvin, Jonathan S., et al. “An...An optimized fluorescent probe for visualizing glutamate neurotransmission.” Nature Methods (2013) PubMed...

...the B(right)est Fluorescent Protein Additional Resources on addgene.org Fluorescent Proteins: Biosensor...a vital tool in neuroscience research. These fluorescent proteins light up in response to calcium, which...indicator, OCaMP. The challenge: Expanding the fluorescent toolbox Modern neuroscience experiments often...often rely on multiplexing, where multiple fluorescent tools are used simultaneously to monitor or control...jGCaMP8) remains the gold standard for green fluorescence, while red indicators jRGECO1a and jRCaMP1a ... OCaMP (Aggarwal et al., 2025), based on the fluorescent protein mOrange2 (Figure 2). Figure 2...International license. Figure 5: A) Simultaneous fluorescence (upper trace) and electrophysiological recordings...

...enzymes could be rescued by supplementation with guanidine hydrochloride (GdnHCl). Rescue occurs through...2016). PubMed PMID: 27393411. Michael McMurray: Rescuing arginine mutations in rare disease with guanidine...development of a pharmacological intervention that rescues the function of even a small fraction of Arg-mutant...the Arg sidechain. Although not related to this rescue function, GdnHCl was approved by the FDA in 1939... is currently no evidence of Arg-mutant protein rescue in living cells. The McMurray lab found that low...concentrations (≤3 mM) of GdnHCl can functionally rescue multiple Arg-mutant proteins in living baker’s ...specific molecular features that allow such “chemical rescue” in vivo. Engineering the human disease alleles...

...interest. Endogenous gene tagging with fluorescent proteins as described here enables live cell imaging to ...Institute for Cell Science Plasmid Collection Fluorescent tagging strategy Figure 1: Gene editing... long stretches of DNA on either side of the fluorescent protein sequence that is homologous to the sequence...through homology directed repair To introduce the fluorescent tag to the cells, we used CRISPR/Cas9 to make...each cell line. The editing strategy and design described above can be used to create similar donor plasmids...cells, and C. elegans. In addition to generating fluorescent protein fusions, plasmids are available for tagging...

...Addgene’s Fluorescent Protein Plasmids and Resources Relevant Blog Posts Plasmids 101: Green Fluorescent Protein...localization studies or make a reporter construct. Fluorescent proteins (FPs) are also the foundation of multiple...use in biological research. Photoconvertible fluorescent proteins Newly developed photoconvertible FPs...Sattarzadeh et al., as well as a wide variety of other fluorescent proteins for your imaging needs. If you need ...LL. A bright and photostable photoconvertible fluorescent protein. Nat Methods. 2009 Feb 6(2):131-3.  PubMed...Verkhusha VV. A photoswitchable orange-to-far-red fluorescent protein, PSmOrange. Nat Methods. 2011 Jul 31;...Protein Which Fluorescent Protein Should I Use? ...

...the Addgene blog Fluorescent proteins 101: Fluorescent Biosensors Which Fluorescent Microscopy Technique...circularly permuted green fluorescent protein (GFP), and nLightR uses a red fluorescent protein, mApple. Kagiampaki...findings that red fluorescent proteins tend to be less sensitive than green fluorescent proteins. nLightR..., J., & Li, Y. (2019). A Genetically Encoded Fluorescent Sensor for Rapid and Specific In Vivo Detection...Plasmids Find Optogenetics Plasmids Visit the Fluorescent Protein Guide Pages ...

...and invade multiple organs, and most importantly escape the immune mechanisms of the host. The cause, manifestation...drug resistance in bacteria, the tumor cells that escape the elimination stage acquire genetic alterations...antigen production to evade the immune system. 3. Escape - Tumor cells that survive this phase are able ...outsmart the host immune mechanisms altogether and escape future immune surveillance. Dormancy of certain...growing, and the immune system stops fighting. Such quiescent cancer may rear its head once the body’s immune...interactions with the immune system, tumors “learn” how to escape it. In this process, cancer cells develop and thrive...Evading Recognition Tumor cells over-express CD47 to escape recognition by circulating macrophages. Tumor cells...

...Caulobacter crescentus, Desulfovibrio vulgaris, Erwinia carotovora, E. chrysanthemi, Escherichia coli, Gluconacetobacter...Bordetella spp., Brucella spp., Caulobacter crescentus, Escherichia coli, Gluconacetobacter xylinus, Paracoccous...Rhodopseudomonas spheroides, Salmonella spp., Serratia marcescens, Streptomyces lividans, Synechococcus spp., Thiobacillus...E. herbicola, E. rubrifaciens, E. stewartii, Escherichia coli, Klebsiella spp., Legionella pneumophila...pneumophila, Methylophilus methylotrophus, Myxococcus virescens, M. xanthus, Proteus rettgeri, P. mirabilis, Providencia...enteritidis, S. typhimurium, S. ordonez, Serratia marcescens, Shigella spp., Vibrio cholerae, Xanthomonas ...Paracoccous denitrificans, Pseudomonas fluorescens, P. putida, Rhizobium meliloti, R. leguminosarum by. viciae...

...the energy transfer is between a luminescent donor and a fluorescent acceptor. TRUPATH uses an updated...blog Browse all of our fluorescent protein blog posts Find other fluorescent biosensors Resources on...can be measured using a technique known as Bioluminescence Resonance Energy Transfer (BRET). BRET is similar...measures heterotrimeric G protein dissociation by bioluminescence resonance energy transfer 2, or BRET2. With... constructs. Cells are then treated with the luminescent enzyme substrate coelenterazine, followed by ...endogenous ligand or drug. In the inactive state, the luminescent chimeric protein Gα-Rluc8 and Gγ-GFP2 will be...on Addgene.org Browse the catalog of fluorescent protein plasmids Find biosensors for your experiments...

...stranded DNA bound by tTALE-FP with the fluorescent protein fluorescing green. Image from Shin et al., 2019...intercalating fluorescent dyes for DNA-protein interaction studies? Kyubong Jo's lab generated fluorescent protein...this vector is suitable for flow cytometry and fluorescence microscopy, they also show that this method ...dx.doi.org/10.15698%2Fmic2020.04.713 Truncated TALE-fluorescent protein fusions as a DNA staining dye Article...specific DNA sequences which brings the attached fluorescent protein to the DNA. They created plasmids for...tTALE-mCherry. In comparison to intercalating fluorescent dyes which can cause photo-induced DNA breakage... lab also used tTALE-FP in a single molecule-fluorescence assay to monitor restriction enzyme digestion...

... of fluorescent proteins is only possible at low copy number ranges, resulting in low fluorescent protein... Cre-loxP system to express one of the three fluorescent protein (XFP) genes in a transgene. When multiple...Sakaguchi et al., 2018) (Figure 1). Once introduced, fluorescent proteins were best imaged after tissue clearing... expression levels. Clearing large tissues - Fluorescent proteins are very stable in SeeDB2. However, ...matching of tissue samples for High-resolution fluorescence imaging using SeeDB2." Bio-Protocol 8 (2018)...Transgenic strategies for combinatorial expression of fluorescent proteins in the nervous system." Nature 450.7166...multicolor labeling of neuronal circuits with fluorescent proteins and chemical tags." eLife 7 (2018): ...