...ambient light, and versatile as it can be activated by both low and high-intensity blue light. Unlike ...experiments that require high photostability, such as time-lapse imaging or with high light power detection of...Single-cell Phenotypic Observation and Tagging with Light (SPOTlight) as a way to isolate individual cells with...Every few months we highlight a subset of the new plasmids and viral preps in the repository through ...here.  Here's what you'll find in this post: Blue-light inducible Cre for use in bacteria CRISPR-Casɸ mGold...New items from the viral service A fast blue-light inducible Cre for precise control of bacterial gene... the use of optogenetics. Optogenetic tools use light to induce conformational changes in a protein.    ...

... FPs, which combine high cellular brightness and monomeric state, are highlighted in blue. aExtinction...consider effective brightness of NIR FPs in cells, in addition to their molecular brightness (a product of ...imaging NIR FPs, consider using light sources that produce enough light intensities in NIR. Usually, mercury...with blue-light controlled optogenetics, such as channelrhodopsins and tools based on light-oxygen-voltage...phytochrome (BphPs) photoreceptors have higher apparent cellular brightness than previously reported widely used...Molecular brightness vs. iRFP713, % Oligomeric state Photo-stabilityc, t1/2, s pKa Brightness in HeLa ...Baloban, M. et al. Designing brighter near-infrared fluorescent proteins: insights from structural and biochemical...

... (24-30°C). Brightness: Brightness is a measure of how bright is the emission. Brightness is calculated...is the emission of light by a substance that has absorbed light. The emitted light is at a longer wavelength...proteins are excited by UV light or blue light and their emission is green or red light. For example, T-Sapphire...lose the ability to emit light) after prolonged exposure to excitation light. Photostability can be as... & pHTomato (pH sensors), HyPer (H2O2 sensor), ArcLight (voltage sensor), and iGluSnFr (glutamate sensor...If you do not have a filter that will pass blue light to the detector/camera, then BFPs are of no use ...using more than one FP, make sure their emission light does not overlap in wavelength. In many microscopes...

...VVDfast homodimerizes under blue light iLID-SspB heterodimerizes under blue light BcLOV4 undergoes a conformational...membrane under blue light CRY2-CIB1 heterodimerizes or forms clusters under blue light Check out our Optogenetics...flip of a switch. You may be familiar with popular light-sensitive ion channels used to control activities...implant or a worm wiggling back and forth under blue light — but there’s a lot more to optogenetics than neuronal...into many other types of proteins. Here, we’ll highlight a few recently-deposited optogenetic tools to ...now, onto our optogenetic tools!  Opto-katanin: a light-powered microtubule-cutting sword Microtubules are...katanin) are recruited to microtubules under blue light, removing tubulin dimers from the microtubule body...

...use a high fidelity ligase? Numerous applications have been developed to take advantage of the high fidelity...(i.e., are "higher fidelity") better than T4 DNA Ligase (21, 25, 26). Despite this higher fidelity, Taq...have a slightly lower Tm around the mismatch) over annealed fully base-paired substrates. Thus, high fidelity...for the high-throughput profiling of ligase fidelity that extends earlier studies through a high-sensitivity...researcher at New England Biolabs. When do you need a high fidelity ligase—and when is an alternative ligase...ligase from a thermostable bacterium that can survive high temperatures (up to 95 °C) and is active over a ...elevated temperatures (37–75 °C). T4 DNA ligase is highly active in nick ligation and DNA end-joining, but...

...the bench overnight. Do not panic! Typically, antibodies are okay if they’re left out overnight, so mark...move forward:  Was a light-sensitive conjugate on the antibody left exposed to light?  Has this antibody...  First, fluorophores vary in brightness. You don’t want a super-bright fluorophore, like PE, on an abundant...Research the brightness of your fluorophores before buying and try to inversely pair brightness with abundance...storage, buffer considerations, and give just the lightest of nods towards conjugates.  Storage   Once you... compared to other data in a manner that demands high accuracy and consistency?  If the answer to any...chemiluminescent conjugate that can be activated to emit light with a simple kit, and is readily available on any...

...out that with light-inducible photosensitizers and a quick zap of the proper color light, you can do just...2I-dL5**).   A FAP-TAP complex will light up if excited with light of specific wavelength and also produce...Publication Here Light-induced cell ablation with MG-2I-dL5** He et al tested out light-induced cell ablation...   Excitation with NIR light also produces less non-specific ROS because NIR light doesn’t excite natural...damage to neighboring cells. TL;DR MG-2I-dL5** is a NIR photosensitizer that allows for precise light-based...photosensitizer is a dye or protein that absorbs light to produce reactive oxygen species (ROS). The ROS...proteins or cells while having little effect on neighboring cells. The photosensitizer used in this work ...

.... Comparison to other high throughput cloning strategies There are several high-throughput cloning strategies...These enzymes might not, however, be appropriate for cloning genes from organisms with high CpG dinucleotide...High-throughput cloning, in a nutshell, is the systematic combination of different genetic sequences ...sequences into plasmid DNA. In high throughput cloning techniques, although the specific sequences of the genetic...biological fields. In synthetic biology for example, high-throughput cloning can be used to combine the functions...fluorescent reporters is a useful application of high-throughput cloning. MXS Chaining is one such technique...construct was flanked with a CMV promoter (to drive high-level expression) and a polyA signal (to terminate...

...sequential administration (Chen et al., 2023). High viral titer High vector genome (vg) doses are recommended...systemic capsids are easy to produce in high titer, but higher doses (>1 x 1012 vg total in mice) may ...how systemic capsids are engineered, as well as highlight some considerations for their use. Then, we’ll... transduction efficiency in the brain along with high off-target expression, particularly in the liver...systemic capsid in question (or both). Therefore, a high-efficiency systemic capsid has better efficacy than... systemic capsids are… well, systemic, there’s a high likelihood of off-target expression, since they ...emerging capsids. Selected capsids are further highlighted below the table.     Figure 2: This ...

... for something to brighten our day, whether it’s memories of summer or just a bright new plasmid. One ...identified from a high-throughput screen, selected for increased voltage response, brightness, and photostability...sensor dLight1.2 and voltage sensor Ace2N and additional GCaMP6 constructs: pAAV-CAG-dLight1.2 (AAV1)...One area with lots of bright new plasmids is our Fluorescent Biosensors Collection - scientists are always...iGluSnFR3 (Aggarwal et al. 2022). This new version has higher signal to noise ratio and is better localized for...variants optimized for different applications (v82 has higher affinity for glutamate but slower kinetics; v857...post.   Figure 2: iGluSnFR3 displays enhanced brightness, expression, and sensitivity compared with earlier...

...relies on ultrasound waves as opposed to light to produce higher resolution images in vivo. “One of the ... result, ultrasound enables higher resolution images at depths up to eight millimeters – not single cells...New York recognized their limitations for peering right through living animals to see their organs – a liver...iRFP713 and iRFP720, is that they absorb and emit light in the near-infrared portion of the electromagnetic... melanin pigments, which absorb the majority of light below 650 nanometers (nm), and the absorbance of...toolbox In the last year, Verkhusha added two far-red light photoactivatable (PA) near-infrared fluorescent ...their fluorescence upon illumination with far-red light. As the researchers described in Nature Communications...

...measured. Archon1 is  bright, exhibits good localization, has high signal:noise ratio, high sensitivity, responds...blue light (445nm). The discovery and applications of protein partners that bind to only the light- or ...Every few months we highlight a subset of the new plasmids in the repository through our hot plasmids...colleagues turned to optogenetics. Through the use of light-sensitive protein domains, they have developed a...system to control CRISPR-Cas9 activity using blue light (Bubeck et al., 2018). They accomplished this by...inhibits CRISPR activity.   With the addition of blue light, the terminal helices of the LOV2 domain unfold,... variant of AcrIIA4.” CASANOVA responds to blue light quickly. Within minutes of inactivating the CASANOVA...

...unprecedentedly-high brightness, bfloGFPa1, and the other with extremely-dim brightness, bfloGFPc1. The...Koike-Yusa et al., Nat Biotech. 2013. Dec 23.   Highly bright and extremely dim GFPs The availability of the...to low-intensity blue light. This approach relies on the incorporation of light-oxygen-voltage (LOV) sensing...made available through Addgene and we want to highlight it for use in your research. Martínez-García... the three dimensional structure of GFP, its brighter mutant S65T-GFP, and the subsequent biochemical ...variety of GFPs with diversity in fluorescence brightness, intensity, excitation and emission spectra. ... MitoTimer reporter using a Tet-on system (pTRE-Tight-MitoTimer) to show its usefulness in cell culture...

...visible light scatter The optical system has both visible and fluorescent light sources. Visible light illuminates...addition to visible light, flow cytometers can have a variety of fluorescent light sources. When interrogated... number based on intensity. Higher intensity events are assigned to higher channels. In a typical assay...experiment. Single-stained samples must be as bright or brighter than any experimental sample. In addition...interrogated with various visible and fluorescent light sources that allow users to assess a cell’s size...and provides useful information about the cell. Light that continues in the same direction as it was initially...size of the cell; larger cells produce more FSC. Light that scatters sideways to the path that it was initially...

...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...

...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...