...external light activation, you can’t use fluorescence to monitor processes directly affected by light. Long-term...nano-lantern emitted yellow-green light and exhibited 3-5 fold increased brightness over previous BRET probes,...Long-term light exposure can also lead to cellular phototoxicity, and experimental success can be affected...FRET, but it eliminates the need for an excitation light source. Instead, a luciferase substrate like coelenterazine...autooxidize and produce background fluorescence, so higher concentrations of the compound can be added to ... (eNL) described in Suzuki et al. improve the brightness of previous Nano-lanterns by 2-4 fold and permit...fluorescent imaging! These eNL constructs use the brightest characterized luciferase, NanoLuc, and its substrate...

...diagnosis. IDT, 2014. Dwight Z; Palais R.; Wittwer CT. uMELT: prediction of high-resolution melting curves...proficiency with common applications - now let’s dive right in! You know qPCR is most commonly used to measure...statistical significance (Taylor, 2017). With the right conditions and parameters, some people find it can...on hairpin design of probes/primers often offer higher allelic specificity, due to the need for the target...work better for rapid-cycle PCR, such as the LightCycler, as it reduces the primer/probe actions to a ...particular has been reported to work well in the Lightcycler while being relatively easy to multiplex (Thellwell...Agarose gel or uMelt analysis dsDNA dye (Sybr)  High No No No Melt curve Hybridization Probes...

...Arch (green-light activated proton pump) and ChR2 (blue-light activated cation channel) light-activated ...near-complete desensitization in continuous light. ArcLight Q239 - A GEVI based on the fusion of the voltage...deactivated using yellow light (590nm). BLINK2 potassium channel - An optimized blue-light induced synthetic ... is activated by cyan light and exhibits an inactivation maximum of 590 nm light. Aurora and Phobos optogenetic...non-neural cells, ion-based communication happens at a slightly slower scale.  All living cells with a membrane...model (Chernet et al., 2016). There are many other light-based genetic tools for studying bioelectricity ...fluorescent protein. This GEVI features increased brightness and improved plasma membrane specificity. Stable...

...COVID-driven virtual drain. Audience needs high speed internet access. High probability of real-time technical...social media… how do you choose? Which way is the right way?  First of all, I want to put to rest a common... areas of any given country have equal access to high-speed internet. Before you begin any work, make ...communication that you enjoy and that plays at least slightly to your strengths. Otherwise, you’re going to ...Resource Requirements Pros Cons Video Medium to high Uses visuals, audios, and text. Incredibly immersive... writing can difficult.  Photography Medium (high for microscopy) Visually compelling. Easy to convey...to make things more accessible by including, highlighting, or omitting details. Digital or print distribution...

...investigating any biological process. High quality genome sequence A high-quality sequence assembly of the ... Developmental biology insights using lineage tracing in zebrafish To highlight some of the features that...Lineage tracing studies highlight how these advantages can translate into insights in developmental biology...as a useful vertebrate model based on their straightforward husbandry and ability to produce abundant, ... a few of the available genetic resources and highlight two recent breakthroughs in developmental biology...lineage tracing approaches that led to important insights in developmental biology. Microscopy-based lineage... This microscopy-based lineage tracing defined a high-resolution map of early embryogenesis in time and...

...by an external light source, they have lower background signal and can be used in light-sensitive systems...Every few months, we highlight some of the new plasmids, antibodies, and viral preps in the repository...collection grows By Ashley Waldron We are excited to highlight the Anti-V5 tag antibody produced by our partners...constant domains, the plasmids for the heavy chain and light chain are also available from Addgene!   ...constructs to tag the GOLG-4 protein, mScarlet3 was 50% brighter than the original worm-optimized wrmScarlet. mScarlet-I3...to reduced background signal when tested in more highly autofluorescent tissues like the intestine. ...Expression of fluorophore-tagged GOLG-4 through eight stages of embryonic development. Representative ...

...500nm) Light 0.1 Crystal Violet Pre and Post Visible Light 100 Methylene Blue Post Visible Light 100 ... and Post Blue or UV Light 0.5 GelRed Pre and Post (Post recommended) UV Light 0.1 GelGreen Pre and...you to visualize your DNA using UV light – please note that UV light can damage DNA and that proper personal...are having trouble getting colonies, you might want to use higher competency cells. Additionally, if your...bacteria; add chemicals to precipitate out the high molecular weight genomic DNA; filter the remaining plasmid...100 Ethidium Bromide Pre and Post UV Light 0.5 For more information on these stains see the Bitesize...final product is going to be very large (>10kb) you might want to use electro-competent cells instead of the...

...editing rates as high as 83% with NHEJ and 40-50% with HDR. Coselection efficiency is so high that some applications...Every quarter we highlight a subset of the new plasmids in the repository through our hot plasmids articles...27798609 Listen to our mCyRFP1 Podcast Segment New bright monomeric red fluorescent protein - mScarlet! The... new RFP variants for increased fluorescence, brightness, and proper maturation. Three new RFPs were isolated...toolbox Increasingly popular Optogenetics tools use light to alter cell physiology and molecular processes...protein is irreversibly cleaved when exposed to light. Robert Campbell’s lab illustrates the utility of...this caging technique to beautifully demonstrate light-dependent Gal4 transcriptional activation and Cre...

...from an mRNA that forms a pseudoknot. At high copy numbers, high levels of the lncRNA bind to RepZ mRNA ... termination. These types of plasmids tend to be high copy number. Here, we will consider the replication... ori called DnaA boxes. These boxes come in both high- and low-affinity versions, but binding of the low-affinity...: it bends the DNA to redistribute the DnaA from high-affinity boxes to low-affinity boxes, allowing lower... redistributes DnaA (red) from binding primarily high-affinity DnaA boxes (dark red) to also binding low-affinity...DnaA negatively regulates its own expression, so high levels of DnaA act as a feedback mechanism to reduce...stringently controlled plasmids, replication is tightly coupled to the bacterial host's cell cycle, maintaining...

... more carefully controlled. Regulated promoters might act only in certain tissues or at certain times ...them on or off at will with a chemical, heat, or light. In the cell, promoters themselves are controlled...of other promoter elements, and tend to be more tightly regulated. Common promoters for eukaryotes and ...Repressed by ethanol Full length version is strong with high expression. Truncated promoters are constitutive...promoter from maize ubiquitin gene Constitutive  Gives high expression in plants. H1 small RNA expression ...polymerase III RNA promoter Constitutive  May have slightly lower expression than U6. May have better expression...depending on its orientation to your gene. T7lac High levels of gene expression Promoter from T7 bacteriophage...

...species like C. elegans and Drosophila. Light inducible promoters Light is another way to activate gene expression...biology use light to regulate transcription. Red flame plasmid pDawn contains the blue-light sensing protein...switched from an OFF to an ON state, and how you might use these in your research. When you're done with...inducible promoters Chemical agents, temperature, and light are all examples of factors that can lead to the...protein YFI. When light is absent, YFI phosphorylates FixJ, which binds to the FixK2 promoter to induce... preventing expression of a reporter gene. When light is present, YFI is inactive, preventing repressor...transcription to take place. Addgene also has yellow flame light-regulated two component systems designed by the ...

... inducing the brightest fluorescence (Filonov et al., 2014). Broccoli is twice as bright as Spinach2 when...Mango fluoresces nearly as brightly as Spinach, but binds with much higher affinity to its cognate small... their high binding affinity to TO1-biotin. Two of these variants exhibit increased brightness compared...V., et al. "RNA mango aptamer-fluorophore: a bright, high-affinity complex for RNA labeling and tracking...biologist’s kitchen lab - and scientists using aptamers might know this best, as most fluorescent aptamers are...are 10-100 base nucleic acid oligos that bind with high affinity to small molecules to induce their fluorescence... the first aptamer identified to bind DFHBI, is highly unstable in vivo due to poor folding and thermal...

... variant has slightly different activation/inactivation kinetics. For example, the light-gated cation ...exists in several states: closed/light receptive, open, closed/light insensitive. If you deliver a continuous...to “reset” and become receptive to light once again. Therefore, light must be delivered in pulses. An example...the optogenetics coin is materials science-based. Light is delivered to your opsin through a small piece... optic cable implanted into the animal’s skull (right). The fiber optic cable is threaded through—and ...then connected from laser to ferrule to deliver light pulses to the target brain region. Thankfully, due...stimulation (the z-axis bregma coordinate). Because the light that is emitted from the end of the fiber optic ...

...the blue light molecule much, much, much more light-sensitive. Then you can use dim blue light and red ...the discovery of a light-sensitive opsin from algae that is sensitive to red light instead of blue, which...to tinker with brain circuits using the power of light. In a recent article published in Nature Methods...electrical activity of neurons on or off using pulses of light. By activating a neuron or set of neurons, you can...that all of these molecules are sensitive to blue light. Many have tried to make green molecules, but then...red light together. Understanding the brain through optogenetics research Addgene: What are some of the ... deep part of the brain, making it sensitive to light. When they illuminated this region, the animals ...

... not only brilliantly bright, but it also withstands denaturing conditions, high temperatures, and other...microscopy as well as correlative light and electron microscopy and observed high fluorescence resilience to ...retains folding and fluorescence in high molarity GdnHCl, at high temperatures, and in the presence of...Every few months we highlight a subset of the new plasmids, antibodies, and viral preps in the repository...CRISPR-Csm doesn’t degrade proximal RNAs nor does it have high levels of off-target effects, both of happen with...of antibodies we produced at Addgene and, as you might suspect, it has been one of our most commonly requested...8R] as another option for targeting GFP. But why might you need a second GFP antibody?  Similarities:  ...

...Signal Strength Lower Higher Sensitivity Higher Lower Background Lower Higher Post-translational ...bioluminescent reporter. This beetle emits a yellow-green light with a peak emission at 560nm. Shortly after the... which ideally would have low background signal, high sensitivity and of course be quick, accurate and...nature of the chemical reaction compared to using a high-intensity laser to rapidly excite GFP. As a result..., chemiluminescent reporters are generally less bright than fluorescent proteins, but have the advantage...Fluorescence Source of Emitted Photons Chemical reaction High-energy photons Kinetics of Photon Generation Slower...Subcellular Imaging Improving Well-established High-throughput assays Improving Well-established ...

...References 1. Viswanathan, Sarada, et al. "High-performance probes for light and electron microscopy." Nature methods...neuronal circuits and dynamics. FPs are generally bright, stable and well tolerated by cells. They can be...intrinsically fluorescent and can be detected with highly epitope-specific, fluorescently-labeled antibodies... signals or using anti-FP antibodies. GFP emits light in only a single channel. In multi-color imaging...the CNS. GFP and other FPs have the tendency to brightly label somata but not neuronal processes. In contrast...contrast, smFPs can label fine neuronal structures with high fidelity and at lower concentrations than GFP. smFPs...of these fine structures through their multiple, high-affinity binding sites for primary antibodies which...

...release. How is this light-mediated? The researchers split the proteolytically active light chain of BoNT/B...and SspB) that undergo light-induced dimerization. Upon application of blue light, iLID undergoes a conformational...Every few months we highlight a subset of the new plasmids in the repository through our hot plasmids...Listen to this episode of the Hot Plasmids podcast Light-mediated block of synaptic transmission Article ...podcast segment An optogenetic tool that allows light-mediated silencing of synapses was developed by ...conformational change allowing high affinity binding to SspB, brings together the split botulinum neurotoxin...created. The depositors demonstrated the utility of light-mediated suppression of synaptic transmission in...

...response and brightness. They also do not spectrally separate from green sensors and blue-light-activated...Physiol 2018. PubMed PMID: 30819783. Light up CreLite: a red-light inducible optogenetic tool for precision...Every few months we highlight a subset of the new plasmids in the repository through our hot plasmids...fluorescent protein (mScarlet) with either a seven or eight amino acid linker between them. The Ace-mScarlet...potential, Ace absorbance increases and results in higher quenching of mScarlet emission. Figure 2... with existing green-fluorescent GEVIs and blue-light-sensitive channelrhodopsins. Find the Ace-mScarlet...optogenetics. Cre activity is controlled by red light by splitting Cre and fusing each half with PhyB ...

...of painful responses in the left and right paw due to blue light activation and CNO silencing. (D) Immunohistochemistry...been made possible due to the collaborative and highly interactive environment that Janelia offers,” says...imaged 14 days post-transfection, excited at 505 nm (right). Scalebar represents 100 µm. Image from Abhi Aggarwal...expressed in the human cell line, Hep3B. From left to right: Mitotracker Red, GFP for the biosensor, Hoechst...changes following opioid withdrawal, providing insight into new methods for treating patients in recovery...involved in mechanical allodynia, a condition where a light touch creates a painful sensation. The dorsal horn...role in perceiving touch inputs. In this system, light activates the neurons (via oChIEF) and a chemogenetic...