...gradient tube before and after ultracentrifugation so that a scientist can extract virus from the correct layer...from AAV Purification by Iodixanol Gradient Ultracentrifugation First, you’ll want to identify the reader...for AAV Purification by Iodixanol Gradient Ultracentrifugation. The reader may be, for example, a graduate... differently in a poster compared to an online abstract or Addgene blog post.  Here, we are presenting...profile photo of an iodixanol gradient after ultracentrifugation. The interfaces between layers are muddled...illustrates a gradient tube before and after ultracentrifugation. The viral supernatant migrates through increasingly...

...induce or inhibit intracellular signaling cascades as a response to the extracellular stimuli. Ligand dissociation...coupled with heterotrimeric G proteins on the intracellular side of the cell membrane. Heterotrimeric G ...signaling is initiated when a ligand binds to the extracellular surface of the GPCR. This results in a conformational...information on this system! GPCR-APEX: Interested in tracking the downstream signaling pathways mediated by ...technique termed “GPCR-APEX” the Kruse lab was able track the activation and internalization of two different... JA, Gygi SP, Kruse AC (2017) Multidimensional Tracking of GPCR Signaling via Peroxidase-Catalyzed Proximity...

...to keep track of why you are doing what you are doing. Another common challenge is to keep track of what... a “traditional” lab notebook; however, keeping track of computation work comes with new sets of challenges...began, I realized that I needed a system to keep track of the files that I was continuously generating....technique leaves a trail that further helps you keep track of your exact changes. Alternatively, you can simply...comment in C++ and Java Command line history: Tracking command line history by recording all commands...Learn about Software You Can Use to Save Time and Track Your Experiments Try out the CRISPR Software Matchmaker...

... do not require any punctures. Intratracheal instillation Intratracheal instillation is used to deliver...invasive. Restraint: anesthesia Location: trachea Gauge (tracheal tubing): 23–20 Volume: < 0.07 ml Skill ...Spinal cord 30 up to 0.01 mL Expert Intratracheal Anesthesia Trachea 20–23 (tubing) < 0.07 mL Advanced ...Intranasal instillation is very similar to its intratracheal counterpart, as both procedures target the lungs...

...abbreviations: Gr= Gracile tract, Cu= Cuneate tract, dCST= dorsal cortico spinal tract, vCST= ventral cortico...cortico spinal tract, dc= decussation of the CST, pd= pyramid, pt= pyramidal tract or CST traversing pons ...segments of the spinal cord showing the cortico spinal tract, CST, spinal cord and cranial nerve afferents labelled..., bp= basilar pons, NST nucleus of the solitary tract.  The arrows point the direction of the specimen...

... less selective if used in intracellular labeling because the intracellular compartment may contain cross-reacting...for other sample types and for non-surface (intracellular) antigens. Unfortunately, antibodies frequently...This can involve cell surface labeling and/or intracellular labeling (or both). It is important to test ...best to determine this by testing them. For intracellular targets, we usually test 3 different fix/perms...helpful to try all three when looking to label an intracellular target.   Figure 1: HCT 116 WT and SYT1...optimizing fixation/permeabilization reagents for intracellular targets. Since knockout experiments can be ...less antibodies labeling them. We find that cell tracker dyes are helpful in designing such panels, so that...

...signaling pathways and the linkage of intra- and extracellular environments. Found on nearly every cell in ...eight beta subunits. Both subunits have short intracellular ends and large ectodomains containing ligand-binding...the cell membrane, physically connecting the extracellular environment and the cytoskeleton. Most integrins...affinity for ligands. When integrins interact with extracellular ligands, their ectodomains can extend and open...mediating cell adhesion and migration, initiating intracellular signal cascades, and allowing agile responses...it is resisted by the ligand embedded in the extracellular environment. This further stabilizes the extended..., organ development, and the shaping of the extracellular matrix. During immune responses, this same conformation...

...be expressed. Are you looking at an intracellular or extracellular molecule? By fusing a biosensor to ...biosensor, you first need to decide the best way to track or measure the process you’re interested in. Depending...created by Olivier Pertz’s lab. Other biosensors track cellular characteristics like pH, redox state, and...calcium sensor CMV-mito-GEM-GECO1  and blue flame extracellular glutamate sensor pCMV(MinDis).iGluSnFR. Picking...population of cells (i.e. in a plate well). Use to track a process (e.g. enzyme activity) over time or under...

...Fluorescent protein fusions One of the easiest ways to track a given protein is to fuse it to a fluorescent protein...fluorescent signal and enables single molecule tracking  within living cells without affecting protein...thereby creating a single-molecule reporter of intracellular processes. Initially, Tanenbaum et al. observed...molecules very effectively - they even managed to track run lengths of the motor protein kinesin across ...cell physiology. Having seen that mitochondrial tracker GFP-mitoNEET can impair mitochondrial function,...photobleaching Simplified, long-term single-molecule tracking Caveats of SunTag Very large size: a 24x scaffold...

... in the extracellular domain which activates the native signaling cascade of the intracellular part of...ligands (PORTLs). OptoXRs are chimeras of the extracellular domain of endogenous light-sensitive receptors...receptors, like mammalian rhodopsin, and the intracellular domain of an endogenous GPCR, such as adrenergic...signaling pathways? Here’s where photoswitchable intracellular proteins come into play. Photoswitches can be...state.      Figure 4: Example of an intracellular signaling pathway activated by an optogenetic...., & Cui, B. (2015). Optogenetic control of intracellular signaling pathways. Trends in Biotechnology,...

...developed by Addgene depositors have made it easier to track translation in two different ways: by monitoring...monitoring the first round of translation or by tracking the translation of a single mRNA over time. Both are ...translation. Single molecule continuous translation tracking TRICK allows you to see the first round of translation...translation, but it doesn’t allow continued tracking of a given mRNA because NLS-PCP-GFP is removed by ...first ribosome that translates the mRNA. To permit tracking over time, Yan et al. devised a system that labels...keeps it in a single field of view for constant tracking. You can then directly monitor multiple rounds...

... endocytosis, vesicle trafficking, or muscle contractions) are produced by orchestrated movements of networks...machines R bodies can repeatedly extend and contract in response to changing pH, and they can rupture...force-generating protein machines that can extend and retract over many microns in response to pH changes without...penetrate other barriers (like vasculature or extracellular matrices) in response to pH changes. Beyond... PMCID: PMC213417. 2. Schrallhammer, M. et al. Tracing the role of R-bodies in the killer trait: Absence...

...antibodies. It’s also particularly useful for intracellular staining where binding of large immune complexes...antibody thus amplifying the signal.       Intracellular protein targets, measured by fixing and permeabilizing...permeabilizing membranes For intracellular protein targets, users must first fix proteins within the cells...fixation. If staining both cell surface and intracellular proteins in parallel, then stain the surface...first, fix and permeabilize, and then stain the intracellular target. When using this approach, avoid fixation-sensitive...inhibit secretion and then follow the typical intracellular staining protocol. Sorting cells with FACS In...fixation and permeabilization are required, as in intracellular staining, consider using an amine reactive dye...

...preparation, VSV-G is stable and can withstand ultracentrifugation which helps scientists achieve a high titer... axon terminals and can’t be used for neuronal tracing or peripheral gene delivery. Combining the rabies... rabies glycoprotein now serves as a retrograde tracer so that scientists can identify the neurons that...2001).  This method can also allow scientists to trace a neuron’s projections back to the cell body. Rabies...Conzelmann K-K, Callaway EM (2006) Retrograde neuronal tracing with a deletion-mutant rabies virus. Nat Methods...2007) Monosynaptic Restriction of Transsynaptic Tracing from Single, Genetically Targeted Neurons. Neuron...

...reporters that use fluorophores and luciferases to track bacteria in real time, but each of these reporters...located deep in the body, like the gastrointestinal tract. Require Administration of Substrate: Some luciferase...signals in ultrasound imaging. Ultrasound is an attractive imaging platform for in vivo imaging experiments...ultrasound imaging of the mouse gastrointestinal tract. The E. coli strain Nissle 197 (ECN) was used for...strain that can colonize the mammalian intestinal tract and has been used for 100 years to clinically treat...

...Stability improvement of antibodies for extracellular and intracellular applications: CDR grafting to stable...minutes in living cells, meaning that scientists can track the movement and localization of single HA-tagged... that HA frankenbody can be effectively used to track single mRNA translation in U2OS cells. HA is small...researchers used the HA frankenbody to successfully track nuclei in a developing zebrafish embryo over an ...

...LanthaScreen) (Degorce et al., 2009), measuring intracellular calcium (Miyawaki, Griesbeck, Heim, & Tsien,...Biarsenical labeling reagents If you want to label intracellular proteins covalently with FRET acceptors, then... nonfluorescent until they bind a 6-residue tetracysteine tag (sequence: CCPGCC) that can be inserted ...interest, resulting in a C-terminal fusion of a tetracysteine tag. In addition, since these tags are so small...large ion channels involved in skeletal muscle contraction.   References 1. Degorce, François, et al. "HTRF...et al. "Hairpin structure of a biarsenical− tetracysteine motif determined by NMR spectroscopy." Journal...

...reverse tetracycline-controlled transactivator) is normally inactive and cannot bind the tetracycline response... inducible promoters. The positive inducible tetracycline ON (Tet-On) system, a versatile tool developed...response elements (TRE) in a promoter. Tetracycline and its derivatives serve as inducing agents to allow...Addgene.org: Inducible Promoters for Bacteria Tetracycline (Tet) On Expression Systems at Addgene Cre-lox...

...by titration with different amounts of tetracycline. Tetracycline regulation is reversible (when the drug...with more elements of control. Tet promoters Tetracycline-dependent promoters are engineered by placing...constitutively silenced proteins. Addition of tetracycline or one of its analogs will induce these transcriptional...transcriptional level.     Fig. 2 Tetracycline on/off promoters and modes of action Check out...

... by ultracentrifugation (75,000 - 225,000 g for 1.5 – 4 hours at 4 °C). After ultracentrifugation, virus...vectors) you can concentrate your virus by ultracentrifugation of the viral stock, followed by resuspension...packaging cell debris before proceeding to ultracentrifugation to avoid contaminating your transduction ... to concentrate a virus solution without ultracentrifugation, you can reduce the volume of cell culture...