We narrowed to 517 results for: Trac

...Fusion Vector at Addgene! Following extracellular RNA editors Tracking factors that utilize exosomal transport...activity is compatible with both intra- and extracellular environments, making it effective for analyzing... overexpression to CRISPR knock-in, letting you track endogenous protein activity and measure responses... hypothesized that if ADAR1 were carried by extracellular vesicles (EVs), edited transcripts could endow...highlights HiBiT tagging as a sensitive reporter for tracking proteomic cargo flow via EVs. Find ADAR-HiBiT ... endocytic trafficking in real time through extracellular-specific and full lytic measurements. Find CFTR-HiBiT...CFTR-HiBiT Fusion Vector at Addgene! Real-time tracking of receptor internalization Work conducted internally...

...video abstracts identified. The journal Cell had the largest average view count per video abstract at 2,947...antibiotic prescriptions for respiratory tract infections. The video abstracts provide a brief introduction to ...science communication through video     Video abstracts about research, especially published research,... views) rounded out the top four average video abstract view counts.” For researchers looking to garner...garner more attention for their work, a video abstract may be a useful tool for turning video views into ...there was a growing number of online research abstracts. With journals in medicine, physics, math, and...), I created a new platform for sharing video abstracts about research: www.WeShareScience.org. WeShareScience...

...of common genetically encoded neuronal tracers Neuronal tracers such as epitope tags and fluorescent proteins...molecules in your favorite neuronal population and track connections to that population. Limitations of ... used for protein localization, isolation, and tracking experiments (Rizzo, 2009). With many different...Spaghetti Monster - A new and improved neuronal tracer With the limitations of epitope tags and fluorescent...fluorescent proteins, it has been crucial to develop new tracers that enable accurate labeling of neurons. As discussed...expressed proteins in particular are difficult to track with these classic probes. To overcome the limitations...Addgene Uses of smFPs 1. Multi-channel connectomic tracers Fluorescent proteins such as GFP have been used...

...called Simultaneous Tracking of Recombinase Activation and Clonal Kinetics (STRACK) to study stem cell...several viral tools can perform neuronal tracing, anterograde tracing poses challenges, from non-selective...While many barcoding libraries are available for tracking cell lineage, different applications require careful...pre-existing heterogeneity of hematopoietic stem cells and track clonal dynamics during differentiation after they...labeling, making it a powerful tool for circuit tracing and other neuroscience applications (Figure 4).... single synapses, a key attribute for neuronal tracing. Labeling was nontoxic and activity-dependent, ...itself could be expressed Cre-dependently to allow tracing exclusively from genetically determined cells. ...

...available for tracking certain cell types. Another useful tool for marking and tracking cells is the the...fluorescently labelled antibodies made it possible to track cells from one organ to another. Thus several labs...lymphoid organs did in the past. How do researchers track fluorescently labeled cells? 1. Epifluorescence ...fluorescent proteins gave researchers the ability to track immune cells within organs and visualize how cells... to the immune lineage, scientists could easily track GFP expressing cells. For example, by harvesting...after antigen challenge, scientists were able to track where GFP labelled B cells were in mounted slices...organs. These GFP labelled cells could also be tracked by cell sorter giving immunologists the ability...

.... Developmental biology insights using lineage tracing in zebrafish To highlight some of the features ...zebrafish useful, I’ll outline two recent lineage tracing approaches that led to important insights in developmental...developmental biology. Microscopy-based lineage tracing Over a period of 24 hours, the externally fertilized...cells in the developing zebrafish embryo have been tracked using microscopy and advanced computational approaches...Keller et al., 2008). This microscopy-based lineage tracing defined a high-resolution map of early embryogenesis... mutagenesis screens. Microscopy-based lineage tracing can help illuminate how signaling pathways—such...development. Single cell sequencing-based lineage tracing Recently, gene expression in all cells of the developing...

...wanted poster that Cas9 uses to track down its suspect—the target DNA. tracrRNA: A “trans-activating CRISPR... of CRISPR. The bacterial chromosome encodes a tracrRNA (in some systems including Cas9), Cas proteins...here). The repeat sequence base pairs with the tracrRNA, and the spacer sequence is used to target complementary...laboratory settings, an sgRNA includes the crRNA and tracrRNA sequences in a “single-guide RNA” that performs... crRNA, forming the repeat:antirepeat duplex. tracrRNAs also contain multiple stem loops that are recognized...proteins, like LbCas12a or AsCas12a, do not require a tracrRNA. sgRNA: “Single-guide RNAs” were invented by synthetic...synthetic biologists. An sgRNA combines a crRNA and a tracrRNA into a single strand that folds back on itself...

...its native context, the tetracycline repressor (TetR) can bind to the tetracycline operator sequences (TetO...preventing transcription. In the presence of tetracycline (Tet), TetR preferentially binds Tet over the...repressible system, Gossen and Bujard created the tetracycline-controlled transactivator (tTA). They fused ...TRE)), allowing transcription to proceed. When tetracycline or one of its derivatives is added, it binds...information on Addgene Tet plasmids, see our Tetracycline resource page. Cumate Switch Massie et. al developed...permit exquisite control of gene expression and tracing of gene expression across development. One common...control of gene expression in mammalian cells by tetracycline-responsive promoters. Proc Natl Acad Sci U S...

...astrocytes Nerve-to-cancer cell mitochondrial transfer tracker Red calcium indicators PinkyCaMP and FRCaMPi Micropeptide...proteomes (Wu et al., 2025). The team expressed extracellularly-anchored horseradish peroxidase (HRP) in striatal...of astrocytes and neurons (CS SPAN) featured extracellular matrix proteins, cell adhesion molecules, transporters...Unveiling the mysteries of the mitochondria with MitoTRACER By Alyssa Shepard As the culturally-proclaimed...this transfer, the Simon Grelet Lab developed MitoTRACER, a retroviral-based reporter system that permanently...receiving mitochondria (Hoover et al., 2025). MitoTRACER relies on a Cre-lox switch to turn recipient ...expression of EGFP. Figure 2: Schematic of the MitoTRACER system. NLS = nuclear localization signal; TEVp...

...a look at some popular self-labeling tools: Tetracysteine: The first reported chemical labeling tag, from...Commercial ligands available Ease of use Tetracysteine (Cys4) 15 Biarsenical dyes (FlAsH, ReAsH... HaloTag for their "ticker tape" method for intracellular recordings, switching between different colored...time points.   Figure 3: Single-molecule tracking of actin filament assembly-regulating proteins...appearance at the filament tip from (a). c) Intensity traces at the tip of the filament from (a-b), showing ...length (lower). d) Intensity and filament length traces for a different event where CP appears briefly ...labeling specificity than short peptide tags like tetracysteine (Jing & Cornish, 2011). HaloTag and SNAP-tag...

...difference. Traces The Traces tab shows the edited and control, non-edited Sanger traces in the region...as determined by comparing the edited trace to the control trace. In the ICE algorithm, potential editing...and Sanger sequenced. ICE compares these sequence traces to give a detailed analysis of CRISPR editing. ...three tabs - Contributions, Indel Distribution and Traces - provides particular details about the indel profile...the reference sequence derived from the control trace file. On the plot, the green (edited sample) and...calls from the .ab1 file are also shown above each trace. The horizontal black underlined region represents...

... epitopes of interest that are found in the extracellular space. The targeted epitopes can be motifs within... T cell. Created using biorender.com.   Intracellular labeling Oftentimes, a marker of interest is... cannot penetrate the cell membrane; hence, intracellular labeling with antibodies requires chemically...analysis to be shifted to a later day. Note that intracellular labeling must be performed only after viability...staining and surface labeling are already done. Intracellular labeling can be subdivided into two categories...procedure in that case.     Figure 3: For intracellular labeling cells need to be fixed and permeabilized...cell proliferation and cell viability. Unlike intracellular labeling, dye staining can be done on live cells...

... beliefs. I asked participants to read short abstracts comparing the mortality rates between two controversial...peer-reviewed study. The second group read the same abstract but with the names reversed, meaning that the ...reversed. The third group read a version of the abstract where the real medical conditions had been swapped...asked to evaluate the quality of the study those abstracts represented. The point of this study was to see...see if their evaluations of the abstracts were driven by the quality of the study design or by their preconceived... significantly more favourable ratings to the abstracts that affirmed their personal beliefs even though...identical. Likewise, when participants read an abstract for a study with findings that challenged their...

...conversion tract length in Drosophila. Elliot et al. (1998) suggests mammalian cells' tract lengths seem...recommends using the Epicentre QuickExtract solution to perform this step to extract genomic DNA from cells. .... The Zhang lab uses around 50 µl of the extraction solution, runs the protocol, then uses around 2–4 ...4 µl in each 50 µl PCR reaction. The gDNA extracted in this way is usually more concentrated than using...pre-processing form of crRNA is expressed and a tracrRNA (the helper RNA that facilitate the processing... then when expressed in cell and with Cas9 and tracrRNA, it will be processed (i.e., cleaved) into a shorter...form of crRNA is fused chimerically to a mature tracrRNA), the spacer used is only 20 bp. Please refer ...

... and recent advances have allowed scientists to track multiple genomic loci over time using all the colors...CRISPRainbow. Figure 1: CRISPRainbow was used to track the localization of 6 chromosome-specific loci in...labeled dCas9 to a given genomic locus, you can track the localization and movement of this locus in live...depositor Stanley Qi and used in Chen et al. to track telomere dynamics throughout the cell cycle. To ...distances from 2-75 Mbp. Labeling multiple, intrachromosomal loci Building on the work of Chen et al., ...turned their attention to mapping pairs of intrachromosomal loci. The technique successfully resolved ... this work represents the first mapping of intrachromosomal loci, a major benchmark in characterizing ...

...but it is for a scaleable lab. When you need to track the location, quality, growth, and legal status ... that everything is grown successfully, we must track and manage all of these steps. Unfortunately, biology...they needed to, they’d have to individually keep track of any failures and do troubleshooting on their ... it’s monumentally difficult without software. Tracking lab procedures also gives you access to hard data...repeated. We also now have a good interface to begin tracking analytics data for lab procedures. With this data...are distinct from their contents. You should be tracking both, you should easily be able to move contents...lab team about how they would like these things tracked. Terminology and language are tricky Names for ...

...Additional opportunities: Tracking intracellular pathogens In addition to tracking the location of proteins...a fluorescent protein fusion, it is possible to track your protein of interest from its production site...the secretory pathway to their subcellular or extracellular destination. At the end of their life cycle,...to be a part of an organelle or involved in intracellular transport pathways, it is possible to map the... in order for the antibodies to reach their intracellular targets. Therefore, it can be beneficial to ...possible to follow the life cycle of viruses and intracellular bacteria – have a look at our Microbiology resources...

...do. A popular screening method for knockouts is Tracking of Indels by Decomposition (TIDE) (Brinkman et...et al., NAR). This technique uses the trace file generated in Sanger sequencing and a simple algorithm...Fig. 1: Overview of TIDE. The input is sequencing trace files of WT and edited cell lines. Then decomposition...and your Cas9-targeted cells. Simply upload both trace files to the TIDE tool online along with your sgRNA... software very similar to TIDE known as TIDER (Tracking of insertions, deletions, and recombination events...outlined above), except that it uses a 3rd sequencing trace file from the donor DNA. This method can precisely...edited sequence would look like (the 3rd sequencing trace). While it requires a little extra wet lab work,...

...mapping of cell populations over time. The ability to track single cell dynamics at the organism level has been... this, similar systems have been developed for tracking various cell types and organisms and for improving... previously (Hadjieconomou et al., 2011). Cell tracing in zebrafish with Zebrabow Before the generation...the multicolor labeling possible from Brainbow. Tracing clonal cell populations using the Confetti mouse...al., 2010), a reporter mouse that can be used to track any cell type when crossed with mice expressing ...construct was then used to develop a system for tracking the fate of Langerhans cells. In the Ubow mouse...brightness of Tetbow allows this system to be used to trace neurons over millimeter-long distances across multiple...

...hybrid of the tracrRNA and the crRNA. The “direct repeat region” combined with the tracrRNA forms the scaffold...which defines the genomic target for Cas9, and the tracrRNA which acts as a scaffold linking the crRNA to ...for processing pre-crRNA into mature crRNA and tracrRNA binding. The spacer regions, on the other hand..., the “direct repeat region” combined with the tracrRNA forms the scaffold portion of a gRNA and the “...and the direct repeat region. B) RNase III, the tracrRNA and Cas9, bind to these transcripts and C) cleave...cleave them leaving mature crRNAs bound to the Cas9/tracrRNA complex. D) The mature crRNA is used to guide ...

...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...

...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...

...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...

... 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,...

...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...

...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...

...libraries Just as physical barcodes help librarians track individual books, genetic barcodes allow researchers...descendants. This makes them useful for lineage tracing, among other applications. Cells can be identified...cell lineage. Variations of this library allow tracking of transcription or chromatin accessibility at...assessment library, and a prime editing lineage tracing library. Other screening libraries CRISPR isn’t...MACKEREL Library, whose acronym means Modular, NGS-trACKable ExpRession Element. This library consists of broad...

...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) Inducible Systems at Addgene Cre-lox Guide...

...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...