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Showing: 21 - 40 of 300 results
  1. Brain Initiative Collection

    Type
    Collection
    ...Anion channelrhodopsin GtACR1 fused to ER export signal and targeted to the neuronal soma and proximal ...KGC-GFP-ER2 under the Syn promoter. Using bGHpA signal. Edward Boyden 115893-AAV8 pAAV-Syn-FLEX-rc [Archon1...floxed/reversed (Cre-dependent) manner. Using bGHpA signal. Edward Boyden 117382-AAV2 hSyn1-eYFP An AAV genome...for photoswitchable control of inhibitory GPCR signaling cascades. Michael Bruchas 139505-AAV8 pAAV-Ef1a-DIO-PPO-Venus...for photoswitchable control of inhibitory GPCR signaling cascades. Michael Bruchas 139505-AAV9 pAAV-Ef1a-DIO-PPO-Venus...for photoswitchable control of inhibitory GPCR signaling cascades. Michael Bruchas 140135-AAV1 pAAV-EF1a-iCreV...
  2. CRISPR Guide

    Type
    Collection
    ...PAM) The PAM sequence (NGG) serves as a binding signal for Cas9, but the exact sequence depends on which...the aptamer improves stability and amplifies the signal for better imaging of genomic loci, as in the CRISPR-Sirius...degraded by Cas12a, it will release a quantifiable signal that indicates the presence of your target DNA ...cleaves the reporter as well, and a quantifiable signal is produced, indicating the presence of that specific...30377362 Casini, A., Olivieri, M., Petris, G., Montagna, C., Reginato, G., Maule, G., Lorenzin, F., Prandi...Pederson, T. (2018). CRISPR-Sirius: RNA scaffolds for signal amplification in genome imaging. Nature Methodss...Vale, R. D. (2014). A Protein-Tagging system for signal amplification in gene expression and fluorescence...
  3. Chemogenetics Plasmids

    Type
    Collection
    ...relationship between neuronal signaling and behavior. Depending on the signaling pathway the engineered receptor...small molecules, allowing a scientist to control signaling within cells expressing these engineered receptors...
  4. Synthetic Biology - Overview

    Type
    Collection
    ...networks. Sensing and Signaling Browse plasmids related to intercellular signaling and environmental sensing...Pumps Voigt Lab Repressors , Terminators , Light Signaling , Sigma Factors , Resource Allocator and Orthogonal...
  5. Viral Vectors 101: Optogenetic Tools

    Type
    Blog Post
    ...stimulation. GPCR signaling GPCR signaling is a complicated process involving many downstream signaling mechanisms...activating entire signaling pathways, but what if you’re interested in studying signaling pathways? Here’... secondary signaling pathways with light. This is achieved by coupling endogenous signaling molecules ...When exposed to light, they activate downstream signaling pathways that can change both the membrane potential...neurons without needing to consider secondary signaling pathways. There are many different opsin (natural...cellular function through multiple intra-cellular signaling cascades. Optical methods for controlling GPCR...light to control GPCR activation and downstream signaling cascades (reviewed in Abreu & Levitz, 2020), including...
  6. Genetic Code Expansion

    Type
    Collection
    ... an aminoacyl-tRNA synthetase (aaRS) loads its cognate tRNA with a specific amino acid. Then, the tRNA...figure below: A plasmid expressing the tRNA and its cognate aminoacyl-tRNA-synthetase (aaRS) that has been ...typically the amber codon) that is recognized by the cognate charged tRNA. Once these plasmids have been introduced...plasmids also contain one or more copies of the cognate tRNA gene. ID Plasmid Synthetase Origin ncAA Expression...
  7. Antibodies 101: Secondary Antibodies

    Type
    Blog Post
    ...low amounts or if the conjugated signaling molecule has a weak signal. For flow cytometry, secondary antibodies... after other signal amplification techniques have been ruled out.  Ease of access Signal amplification...immunoimaging. A scientist conjugates an antibody with a signaling molecule, the antibody binds to a protein, and... voila! Wherever your protein of interest is, a signal will also be. This is the direct approach to immunoimaging... if the direct approach isn’t giving you enough signal to detect your protein of interest, it may be time...primary antibody. In the indirect approach, the signaling molecule is conjugated to the secondary antibody...sensitivity of an assay by increasing the number of signaling molecules associated, indirectly, with each protein...
  8. GPCRs: How Do They Work and How Do We Study Them?

    Type
    Blog Post
    ...are able to signal through more than one subtype. How GPCR signaling works GPCR signaling is initiated...subsequently another round of signaling.    Addgene Tools for Studying GPCR signaling  So with the hundreds ... three senses, GPCRs play roles in initiating signaling pathways in inflammation, and neurotransmission...neurotransmitters, photons or odorants, to elicit downstream signaling cascades.  So let’s break down the name "G-protein... G proteins are important molecular switches in signal transduction pathways and consist of a trimer of...subunits then induce or inhibit intracellular signaling cascades as a response to the extracellular stimuli...GPCRs out there, how can scientists decipher the signaling pathways from ligand to receptor to G-protein,...
  9. Flow Cytometry Readouts: Yes, No, and Everything in Between

    Type
    Blog Post
    ... that the signal for the positive population is no higher than 105 signal intensity. Signals any higher...better. The histogram shows peaks of high signal densities, so signal shifts due to upregulation or downregulation...indicates a higher signal, or upregulation, and a peak to the left indicates a lower signal, or downregulation...higher for a signal peak that shifts to the right on a histogram plot and lower for a signal peak that shifts... the voltage will shift it to the left. If your signal is too high, lower the voltage to have your positive...GFP protein are most likely to be clustered at signals below 103, while the GFP+ population cluster would... in comparison, say somewhere between a 104–105 signal intensity. If your samples and controls were processed...
  10. Working with Nuclear Receptors

    Type
    Blog Post
    ... of multiple cell signaling systems. Activation of membrane receptors and signaling cascades conceivably...Nuclear Receptor Signaling. Dr. McKenna edits the website of the Nuclear Receptor Signaling Atlas (NURSA)...actions instigated by the central nervous system signaling to peripheral effector organs, which then return...actions on other tissues. At the Nuclear Receptor Signaling Atlas (NURSA), one of our primary goals is to ...permit the integration and communication of such signals between central and peripheral organs because of...molecular sensors and governors of endocrine-hormone signaling. The success of members of this group stems in...acetyltransferases or CARM1 methyltransferase. This attendant signaling feature afforded by coactivator complexes suggests...
  11. Corralling and Cornering the Goldilocks Antibody

    Type
    Blog Post
    ...light to discern the signal. If the exposure time is long (e.g. > 1/7s) then the signal is weak and vice ... versa for a strong signal. However, exposure time and its relationship to signal depend on what you’re...prominent, strong signal has a shorter exposure time than the negative control, and a weak signal has a longer...sample with the primary included to confirm that the signal is from the primary antibody and not from the background...negative control, such as showing a very bright signal only in the hippocampus compared to other regions... antibody has specific binding and has a strong signal. We call the unique pattern of the antibody binding... an expectation and comparison on the antibody signal’s location. If a distinct imaged pattern does NOT...
  12. Bacterial Expression Systems

    Type
    Collection
    ...11086 Tac (lactose/IPTG inducible) MBP, 6x His, signal sequence for localization to the periplasm David...-terminal 6x His tag and an MBP tag. Contains a signal sequence to localize the protein of interest to...bacteria. The presence of arabinose enhances the FRET signal from the CFP and YFP fluorophores linked by an ...
  13. SunTag and Fluorescent Imaging

    Type
    Blog Post
    ...SunTag signal allowed them to cut their laser power by over 80% and still obtain a higher signal-to-noise...transcriptional activation. Multiple nuclear localization signals (NLS) increase protein import into the nucleus....lesson and created a system to amplify fluorescent signals. Named for the "stellar explosion SUperNova," SunTag...have to increase your imaging time to get enough signal. This workaround risks cellular phototoxicity and...short epitope GCN4. GCN4 recruits GFP fused to the cognate scFV antibody, which is expressed from a separate...system amplifies the intensity of the fluorescent signal and enables single molecule tracking  within living...traditional fluorescent proteins Improved brightness and signal-to-noise ratio Less chance of phototoxicity Reduced...
  14. Antibodies 101: The Four ELISAs and When to Use Them

    Type
    Blog Post
    ...common enzyme-based reporter methods. For enzymatic signal detection, users provide a substrate that the enzyme...into a detectable product. Scientists compare the signal intensity of the sample to that of a standard curve...direct, indirect and sandwich ELISA the reporter signal is directly proportional to the level of antigen...sample whereas in a competitive ELISA the reporter signal is inversely proportional to the level of antigen...reacts with a provided substrate and produces a signal that is directly proportional to the level of antigen...background staining. Direct ELISAs also lack the signal amplification afforded by secondary antibodies ...single primary antibody and thereby amplify the signal. Since the primary antibody does not need to be...
  15. Antibodies 101: Reading a Flow Plot

    Type
    Blog Post
    ...variations in fluorescent signals, and how the machine reads/interprets the signals, the axis is instead divided...the cut-off value for a positive signal (Figure 8). Note that the signal is actually on the X axis; what...passes through the machine’s lasers and gives off a signal read by the machine’s sensors. (Usually this something...(right.) Each event is plotted by the amount of signal read from Marker A and Marker B. Created with biorender.com... divided into positive and negative signal at a point on the axis determined by the researcher, based ...frequency of events on the Y axis and strength of signal read on the X axis may be presented. A horizontal...peak is sufficiently narrow to count as a “true” signal.  Figure 8: A series of histograms from ...
  16. Troubleshooting and Optimizing a Western Blot

    Type
    Blog Post
    ...In this example, a 1:1,000 dilution gives a high signal with low background. Created with biorender.com...during your transfer instead of one. If you see signal on both membranes, you know your protein is over-transferring...over-transferring! If you see very little signal, but you know you loaded a good amount of sample of a ...high background (insufficient blocking) or reduced signal (too much blocking.) If you’re having issues with...concentrations of blocking buffer. If you see a low signal, you can optimize blocking conditions by running...protein’s expected concentrations, you’ll see the signal increase as the concentration of the protein increases...samples. If multiple dilutions are showing the same signal (Figure 3B), that means the amount of protein loaded...
  17. Luciferase Plasmid Collection

    Type
    Collection
    ... leading to the emission of photons. The robust signal, sensitivity, wide dynamic range, and resistance...substrate Akalumine with significantly brighter signal and emission in the near-infrared range, enabling... assess FKBP and FRP interactions in the mTOR signaling pathway in vivo . DULIP ( DU al L uminescence-...
  18. Plasmids for Stem Cell Research

    Type
    Collection
    ...cells with unique epigenetic and gene expression signatures. Cell Res. 2011 Mar;21(3):518-29. Cheng piggyBac...cells via temporal modulation of canonical Wnt signaling. Proc Natl Acad Sci U S A. 2012 May 29. Palecek...Chemical modulation of transcriptionally enriched signaling pathways to optimize the conversion of fibroblasts...
Showing: 21 - 40 of 300 results