We narrowed to 867 results for: ell

... a look! mNeonGreen: a yellow-green fluorescent protein mNeonGreen is a yellow-green fluorescent protein...protein that was derived from the tetrameric yellow fluorescent protein (LanYFP) from the marine invertebrate...was reported as the brightest monomeric green or yellow fluorescent protein at the time. It is 1.5 to 3...mNeonGreen wavelengths lie between the green and yellow fluorescent protein wavelengths, it can be imaged...with standard green fluorescent protein filters or yellow fluorescent protein filters, with no or minimal...a FRET donor to mCitrine and mOrange or for live cell imaging of fusions and FRET reporters. mTFP1 is ...

...millions of cells. For every individual sgRNA, you recover a minimum of 1,000 targeted cells to sequence...trying to generate a knockout cell line, with the goal of isolating single cell clones to use for multiple...generate a ssDNA break which can easily be repaired by cells with a near zero likelihood of mutation arising.... a level of, say 5%, then the majority of single cell editing events will be on target. Thus, if you isolate...example, if your goal is to generate a knock-out cell line to perform downstream characterization of, ...experiments on is a good way to control for off targets as well as clonal differences. If you are performing CRISPR...

...to detect dead or dying cells so that you can base your analysis on living cells only (for example, propidium...Fluorescence Microscopy.” Journal of Cell Biology, vol. 185, no. 7, Rockefeller University Press, June 2009, ... positive control group, with an alternative but well-studied kinase known to prevent tau hyperphosphorylation...interactions will be observable in preimmune serum ‌as well as with an isotype-matched control.      ...This tends to be most problematic when staining cells or tissues that are the same species as your primary...propidium iodide only stains dead cells). Compensation controls address the spectral overlap that occurs...

... glutamate release from neurons and other brain cells in vivo. Glutamate plays a variety of roles in synaptic...(SF-Azurite-iGluSnFR), green (SF-iGluSnFR), and yellow (SF-Venus-iGluSnFR). iGluSnFR3: Improved Glutamate...photostability, quantum yield, and expression. Create yellow (v82) and lime green (v857) variants differing ... versatility through two different variants The yellow (v82) and lime green (v857) versions can be summarized...sensor to the membrane and displays it on the extracellular side. In addition to the original PDGFR TMD,...promoter, FLEXed for expression in Cre-expressing cells hSynap: Human Synapsin-1 promoter. Good for neuronal...promoter, FLEXed for expression in Cre-expressing cells. hSynap-FLP: Synapsin-1 promoter, FLP-dependent ...

... used HEK293T cells in our first study, but we're planning to soon expand to other cell types, including...26 of the 29 SARS-CoV-2 viral proteins in human cells and used these viral “bait” proteins to fish for...human proteins that the virus interacts with in cells. Because viruses rely on the help of human proteins...monkeywrench into the virus’ hijacking of human cells. Even better, more than half the drugs hitting these...they have an IRES-Puro marker to facilitate stable cell clone selection. Expression is driven by a fairly... as the EU, Russia, India and Saudi Arabia -- as well as closer to home in the US and Canada. In fact,...

... of human stem cells when students are not even allowed to manipulate prokaryotic cells? Especially, if...should be “brains-on”, but as much as I try being compelling, interactive, and application-driven to boost...where you need to apply basic molecular biology, cell biology, microbiology, genetic engineering and strategic...could be used to genetically manipulate human stem cells. Then they had 10 minutes to expose their strategy...construct and explain why they selected a certain target cell population. Who is the winner? Ultimately, society...gene therapy in the following lessons. And let me tell you more, they had brilliant ideas on how to solve...

...Awardees: Xin Zhou and Fatima Enam. There were many excellent applicants but Xin and Fatima stood out for their... is currently a graduate student in Thomas J. Mansell’s lab at Iowa State University where she is developing...reliably detect HMOs. Fatima’s first design is a whole cell biosensor with two components - an enzyme that breaks...proposes using this sensor to detect HMOs found on cellular surfaces. After incubating the sensor with bacteria...binding results in an increase in fluorescence of cells that actively produce the HMOs. Fatima has demonstrated...work at her home town in Bangladesh where it was well received. In addition to her research endeavors,...out Fatima's recent publication on her HMO work in Cell Chemical Biology! Additional Resources on the Addgene...

...’re saving trees! The Earth thanks you. 2. Gibco Cell Culture by Gibco Whenever I start to learn a new...spectrometry app. I digress. When I started learning proper cell culture technique, I tried to find an app that could...calculations. This is how I came across the Gibco Cell Culture app. Gibco organizes its app into four categories...tools are a lifesaver when your research requires cell culture and include a counter, lab timer, dilution...educational section. This section holds the Gibco Cell culture manual and basic instructional videos. The... Overall, it’s a great tool for someone starting cell culture work. 3. NEB Tools by New England BioLabs...alternative, similar apps: Findings Lab Notebook Cell Culture Split Calculator by DRDP Restriction Enzyme...

...Marcotte EM, Voigt CA, Ellington AD. Cell. 2009 Jun 26;137(7):1272-81. doi: 10.1016/j.cell.2009.04.048. PubMed...with sophisticated gene expression controls. Most cell types do not respond to low-intensity light, so ...bacterial camera that prints a chemical image, as well as a genetic method for the computational problem... are compatible with many strains of E. coli, as well as with other plasmid-based systems, which will ...ZB, Lavery LA, Levy M, Davidson EA, Scouras A, Ellington AD, Marcotte EM, Voigt CA. Nature. 2005 Nov 24...

...carefully select first hires who are well-suited, productive, and fit well with your goals. These first hires...and foster an effective working environment? Tom Ellis was offered a start-up package that included a postdoc... most surprising thing about becoming a PI? Tom Ellis has a one word answer: “Email. Nothing prepared ...differently or the same as your adviser did? Tom Ellis merges the influence from his two PhD advisers who...our latest results as soon as the gels ran.” Dr. Ellis tries to lead his team as a scientists and a friend... lab!”   Acknowledgments Thank you to Dr. Tom Ellis (Imperial College London), Dr. Connie Cepko (Harvard...

...bacteria, so it can be transformed as-is into cells. The cells then get to work fixing up the “damage” and...nicked plasmid together long enough to get it into cells and let them do the repair work. The key is T4 DNA... update, courtesy of Addgene depositor Stephen Elledge. His new method, named sequence- and ligation-independent...assembled in a unique order with no cloning scars. The Elledge Lab showed that a five-piece assembly reaction ...vitro to generate recombinant DNA via SLIC. Li MZ, Elledge SJ. Nat Methods. 2007 Mar;4(3):251-6. Epub 2007...sequence- and ligation-independent cloning. Li MZ, Elledge SJ. Methods Mol Biol. 2012;852:51-9. doi: 10.1007...

...editor in mammalian cells Not all Cas13d proteins are functional in mammalian cells, but Konermann et al... Ruminococcus flavefaciens (nicknamed CasRx), as well as EsCas13d. Find the Yan et al. plasmids here ...make it possible to target essentially any RNA in a cell. Since catalytically dead dCasRx maintains its RNA-binding...natural diversity of CRISPR systems, only time will tell how large the genome and transcriptome engineering... with RNA-Targeting Type VI-D CRISPR Effectors.” Cell (2018) pii: S0092-8674(18)30207-1. PubMed PMID: ... a WYL-Domain-Containing Accessory Protein.” Mol Cell. (2018) pii: S1097-2765(18)30173-4. PubMed PMID:...

...expression and needing to work with a transfectable cell line. 2) They require larger expression vectors... of 4 crRNAs in vitro and when expressed in 293 cells. This allows for a single promoter to drive expression... were used.  With transfection, 6.4% of HEK293T cells had edits at 4 of 4 targets when an array of 4 crRNAs...transfected on a single plasmid. This is versus 2.4% of cells transfected with a pool of plasmids that contained...processing of the crRNA array when expressed in cells, but notice how Zetsche et al reverses the orientation...mouse neurons and in vivo. For these experiments, cells were infected with a 1:1 ratio of two AAVs,  one...RNA-Guided Endonuclease of a Class 2 CRISPR-Cas System. Cell,163(3), 759-771. PubMed PMID: 26422227. PubMed Central...

...want to learn more about Synthetic Biology. Can you tell me where to start?” is a question more and more ...2011, BioBuilder is the brainchild of Dr. Natalie Kuldell from MIT’s Department of Biological Engineering...from her 20 years of college teaching experience, Kuldell sought to create a program that would capitalize...contribute as part of a team.” As a seasoned educator, Kuldell also knew that the best days in the classroom are...plan or outstanding test scores.  As a result, Kuldell launched the BioBuilder Educational Foundation ...of Professor Richard Murray. Murray’s lab uses cellular extracts to perform transcription and translation...develop and test hypotheses. Students then use cellular extracts as a means to rapidly prototype DNA circuits...

...Drosophila cell line, I’ve studied a transcription factor important for T cell differentiation (a cell type ...integration will have eyes that are anywhere from light yellow to red. The variation in color depends on how transcriptionally...vermillion (another gene controlling eye color) and yellow (a gene affecting the body color of the adult fly...regeneration and homeostasis in the Drosophila midgut. Cell. 137, 1343–55 (2009). PubMed PMID: 19563763. PubMed...et al. Digoxin and its derivatives suppress TH17 cell differentiation by antagonizing RORγt activity. ...

... to impress the judges on your ability to tell a compelling narrative that is positive, and forward-looking...size, legibility, and more). Tips on drafting a stellar resume and cover letter can be found on the Addgene...recommenders based on your relationships to the person as well as their current sphere of influence. In other words... for them, the likelier you will end up with a stellar letter of support.        5. Application submission...landscape beyond college. They will also serve you well when you are applying for an entry-level position... as you apply for internships, scholarships, fellowships, and entry-level positions post graduation. ...

...toolkit in human cells. Nissim L, Perli SD, Fridkin A, Perez-Pinera P, Lu TK. Mol Cell. 2014 May 22;54(...effect of gene knockout in vivo and in vitro, as well as to insert targeted mutations through homologous...advantageous to instead use a preexisting, conserved cellular machinery to process gRNAs. Hijacking tRNA processing...tRNAs are among the most abundant molecules in a cell, this system is clearly also robust enough to ensure...examine the frequency of both indels at each locus, as well as large deletions. They detected fragment deletion...characterized the system in plants, PTGs will likely work well in many different biological systems. Size is also...

...timeline from transformation to testing and a lack of well-characterized genetic tools make it challenging ...challenging to engineer a specific function in these multicellular organisms. However, the rewards are great if ...pathways involved in central anthocyanin metabolism are well understood. Additional work has also identified ...tools facilitates plant science. Challenge #3: Intellectual property There is another challenge associated... agricultural companies and carry associated intellectual property concerns – patents and licensing agreements...Biochemistry Department at the University of Manchester as well as the Biology Department at CSU. When not pursuing...enjoys spending time with her husband and two Jack Russell Terriers. More SynBio Reading: Learn more about...

...assemble a crack team of Addgenies that includes: Michelle, the Senior Scientist who coordinates all kit ....” There was a time in human history when an intelligent, motivated person really could know a little ...any favors by trying to go it alone. The help of fellow lab members and collaborators will not only get...will ultimately improve the quality of the work as well. Social interaction is a good thing Part of you...communication Few people actually like meetings, but run well, meetings can be a critical part of any successful...team could have a strong sense of purpose, an excellent leader, and perfectly clear lines of communication...myth. The original Dr. Frankenstein from Mary Shelley’s novel worked alone, but even the movie makers ...

...Deletions in Human Embryonic Stem Cells Using Type I CRISPR-Cas. Molecular Cell, 74(5): 936-950.e5 (2019). 10.1016...a class 2 CRISPR-Cas system. Cell, 163(3): 759-771 (2015). 10.1016/j.cell.2015.09.038 Harrington, B., ...is shared by other Cas enzymes outlined below as well. Cas12a also has significant therapeutic promise... Cas13 are 1). non-specific RNA cleavage and 2). cell toxicity. Cas7-11 does not display collateral RNA...cleavage and is significantly less toxic to mammalian cells than Cas13 (likely due to the lack of collateral...

...in transfected eukaryotic cells, allowing for them to be used as intracellular inhibitors.  Aptamers are...small enough to be expressed in bacterial and other cell systems. Since the majority of these alternative...the constant region. Nonspecific binding, caused cell receptors for the constant region, is also reduced...binding strength, half-lives, and/or specificity as well. They’re more difficult to source, may not be readily..., peptides, amino acids, drugs, metal ions, and cells. They can be used either with or as fluorophores... may sound. Validated antibodies are still an excellent option for many applications, and frankly, if ...

... in the embryos, as well as whole exome sequencing of embryo derived-ES cells.They also conducted whole...ssODN repair template in induced pluripotent stem cells made from the patient. With the first gRNA, they...homology-directed repair (HDR) taking place in 41.2% of edited cells. The results were even lower for the second gRNA...13.1% targeting efficiency with only 13% of edited cells employing HDR. Ma et al. moved forward with gRNA...babies.” The differences in editing between iPS cells and embryos make a case for conducting research ...analysis is not possible with IVF, as most of the cells are needed for proper development. Ma et al.’s experiments...

...transgenic animals, embryonic stem cells, and/or tissue-specific cell types: Cre-lox recombination. What.... How can I use Cre-lox? The Cre/lox system is a well-established research tool, especially in the field...downstream of promoters that are active only in certain cell or tissue types, during certain stages of development... recombinase can be expressed only in specified cells or at specified times. Combining this with some ...has been used to successfully introduce Cre into cells of interest. What if I need two separate recombination...2. Site-specific DNA recombination in mammalian cells by the Cre recombinase of bacteriophage P1. Sauer...

... in vivo conditional gene rescue experiments, as well as for improvement of optogenetic adeno-associated...delivered using AAV injection, the majority of the cells surrounding the injection site will become infected... ensure that the reporter remains silent until a cell or tissue-specific Cre is provided. Since the FLEx...used to study the physiology or behavior of certain cell populations.  Acknowledgement:Through a partnership...for monitoring Cre-mediated recombination at the cellular level in the mouse. 2003 PubMed PMID: 12665802...FLEX switch targets Channelrhodopsin-2 to multiple cell types for imaging and long-range circuit mapping... Michelle Cronin...

...Single-Domain Camelid Antibodies. Cell 181:1004–1015.e15 . https://doi.org/10.1016/j.cell.2020.04.031 Zimmermann ...coronaviruses and enable the virus to enter host cells. To do this, they injected the spike protein from...camelid antibodies that bind to the spike proteins in cell culture, and inhibit these viruses.  But llama ...hidden in the molecular crevices proteins on the cell surface. Figure 1: Comparison of common antibody...Graham BS, Callewaert N, Schepens B, Saelens X, McLellan JS (2020) Structural Basis for Potent Neutralization...blog Opto-Nanobodies: Using Light to Manipulate Cell Signaling and Protein Purification RANbodies: Reporter...

...establishment of in-house sequencing capabilities and Seqwell’s plexWell technology, we can now perform NGS at Addgene... check viral transgene expression in transduced cells whenever possible. This post will describe our workflow...fragments of DNA from the helper plasmids or the cell genome can be packaged inside the vectors during...earlier, it is common to find DNA from the packaging cell genome, bacterial genomes, cloning vectors, and ...future plans How did AAV-68544 become contaminated? Well, we purposely mixed another AAV vector with AAV-...Tasissa M, Kostman M, Tillgren M, Makana Hanley L, Mueller I, Mitsopoulos A, Fan M (2020) A Novel Next-Generation...

...transparent are enabling microscopes to visualize the cellular architecture of whole tissues in 3D with unprecedented..., CST, spinal cord and cranial nerve afferents labelled with a AAV8 expressing eGFP under the human ubiquitin... (2007). Nature Methods, 4, 331–336. Pubmed. P. Keller, M.B. Ahrens.  (2015) Neuron, 85, 462-483. Pubmed... Weber, M. Mickoleit, J. Huisken. (2014) Methods Cell Biol.123, 193-215. Pubmed. W. Spalteholz. (1914)...296, 541-545. Pubmed. A. Ertürk, C.P. Mauch, F. Hellal, F. Förstner, T. Keck,  K. Becker, et al. (2011... Jährlin, C.P. Mauch, C.D. Hojer, J.G. Egen, F. Hellal, F. Bradke, M. Sheng, H.-U. Dodt. (2012). Nature..._the_OpenSPIM_Wiki http://www.janelia.org/lab/keller-lab http://www.physikalischebiologie.de http...

...with a great story to tell? Let us know by emailing us at [email protected] or tell us on Twitter and Facebook...amazing stories to share. I spend a lot of time telling scientists about Addgene’s repository, and explaining...better day at the office but for stronger science as well. This blog is our way of continuing the conversation...whether you’re a graduate student, post-doctoral fellow, lab manager, research technician, or Principal...conversation! Do you have a question about culturing iPS cells? Confused by which system to use for genome editing...

...benefit, replicates are built into the technology. One well (containing thousands of droplets) can be sufficient...fluorescence amplitude measured for each droplet in each well (Figure 2). A clean ddPCR should have a clear separation...negative (gray) droplets. The no template control wells should have very few positive droplets. In the image... copy per microliter in the no template control wells. You’ll also notice a reduction in the number of...cross contamination into a no template control (NTC) well is common. Here are some steps you can take to achieve...applications for the technology.  Droplet digital PCR is well suited for the detection of low copy numbers. For...used in the detection of rare sequences and single cell analysis. It is also being used in the detection...

... Orientation-Specific Tells you the orientation of the insert Tells you if the insert is present...product. Additionally, this type of primer only tells you if your specific insert is present but not if...without the insert. This type of primer pair can tell you if the insert is the correct size and whether...Insert-Specific Simple "yes or no" test results Doesn't tell you the orientation of your insert or if the insert...band (-) result as insert-specific primers but also tell you whether the insert has the correct directionality...clones you’ll need to send for sequencing, but won’t tell you if your products have any mutations.  There ...