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We narrowed to 854 results for: ple

Showing: 241 - 260 of 854 results

  1. Mobile-CRISPRi: Bringing CRISPRi to Diverse Bacteria

    Type
    Blog Post
    Published
    April 4, 2019, 12:53 p.m.
    ...when studying them since their complete knockdown is lethal. Incomplete or titratable knockdown, however...the tools scientists can use to study them. For example, gene knockdown with CRISPR interference (CRISPRi...wall. Once in the recipient cell, the CRISPRi DNA (purple) flanked by left and right Tn7 end sequences (green...showed that Mobile-CRISPRi is transferable into multiple bacterial species including several involved in...pathogenic strains and environmental isolates. For example, Peters and colleagues used Mobile-CRISPRi to knockdown...if that gene is a target of an antibiotic. For example, let’s take a look at the essential gene folA which...also possible with Mobile-CRISPRi. As a proof of principle, Peters and colleagues constructed a 40-member...

  2. Starter guide to induced pluripotent stem cells (iPSCs) part 1:  A renaissance in regenerative medicine

    Type
    Blog Post
    Published
    Oct. 30, 2018, 1:04 p.m.
    ...into multiple cell types of the same lineage. Blood (hematopoietic) stem cells are a good example of multipotent...mostly to maintain cell numbers or replenish dying cells. For example, hematopoietic stem cells found in...functions [1]. In many tissues, stem cells serve to replenish/replace damaged cells that no longer function ...[1]. Stem cells’ ability to differentiate into multiple cell types makes them useful models for developmental...thought of as descendants of totipotent cells. An example of pluripotent cells is embryonic stem cells (ESCs...in science communication and publishing after completing her postdoctoral training from Massachusetts ...

  3. Light Sheet Fluorescence Microscopy

    Type
    Blog Post
    Published
    July 16, 2015, 2:30 p.m.
    ...cameras with electron multiplying couple-charged device (EMCCD) or complementary metal-oxide semiconductor (...neurosciences.  These developments in microscopy coupled with techniques that make tissues transparent are...beam into a thin sheet to illuminate a fluorescent sample and captured the reflected light using a different...combined light sheet microscopy with sequential multiple-view reconstruction (5). In order to image large...microns, illuminates only one thin plane of the sample surrounding the focal plane of the detection lens...problem is to illuminate and acquire images of a sample from two opposing sides and merge the images, such...through Addgene.  The combination of LSFM with multiple tissue clearing strategies and neuronal labeling...

  4. With an Eye Towards the Future, We Look Back at the March for Science

    Type
    Blog Post
    Published
    Oct. 24, 2017, 1:54 p.m.
    ... disturbing trend in the number of high profile people denying science, from celebrities falsely claiming...scientists questions about their work. Thousands of people showed up; some with some really great signs. The...work because it's important to our health.  Most people won't argue with that idea, but they might feel...figures.  Ask me about my science!", read my sign.  People asked, and we talked.  That's a win. Mark Lucera..., challenged us. I worried the march would be a simple, unquestioning celebration of science, at a time...funding, and teaching experience that it takes to complete your resume, without ever thinking that research...things about science. We need to keep encouraging people to look for evidence through education.  My only...

  5. Better Dyeing Through Chemistry & Small Molecule Fluorophores

    Type
    Blog Post
    Published
    Sept. 8, 2016, 2:30 p.m.
    ...removing excess dye from the sample, which is particularly important for samples where washing is difficult...reason is something called “the photon budget”: each sample has a limited number of fluorophores and each fluorophore...of information one can extract from a biological sample is wholly dependent on the photon budget and pushing...fluorescence microscopy often requires more photons. For example, moving from transient overexpression of protein... desperate to extract a few more photons from a sample. Chemical fluorophores can be substantially brighter...labeling chemistry easier and more functional in complex biological environments such as live cells and ...brightness of the resulting conjugate, and the complexity of the system. A particularly desirable property...

  6. Course-Based Undergraduate Research Experiences (CUREs)

    Type
    Blog Post
    Published
    Feb. 9, 2023, 2:15 p.m.
    ...When Karl Barry Sharpless was awarded this year’s Nobel Prize in Chemistry, he joined an elite club, ...his program. Initially, Provost made his labs completely open-ended, allowing every student to work on... the culmination of many such experiences. For example, students in Provost’s course recently used a combination...Kowalski et al., 2016; Scott, 2021). In fact, completion of Provost’s CURE increased students’ confidence...Community (MCC) that seeks to reduce barriers to implementation. Funded by the NSF (with Co-PIs Jessica Bell...for your classroom, I highly recommend you try implementing one. It's likely only a matter of time before...Poirier, V., Pellettieri, J. 2020. The exon junction complex is required for stem and progenitor cell maintenance...

  7. Interview: Hodaka Fujii on enChIP, New CRISPR Tools, and More

    Type
    Blog Post
    Published
    Dec. 2, 2014, 7:23 p.m.
    ... for example, helping to improve the papers submitted to journals. In addition, it is my pleasure to interact...enChIP system enables us to express the CRISPR complex much easier in various cells, including primary...technologies consisting of iChIP and enChIP are recent examples. We also developed the inducible translocation...and PLoS One. Additionally, you are involved in multiple professional scientific societies. Why is being...system of journals and grant applications, for example. However, at the same time, it's fun to be involved...give to post-docs and graduate students as they complete their appointments in your lab?  Fujii: These ...develop new technologies, hopefully they'll be completely different from what we are now doing in my lab...

  8. CRISPR 101: Cytosine Transversion Editors

    Type
    Blog Post
    Published
    March 25, 2025, 1:15 p.m.
    ...and replaced it with a double-bonded oxygen. This simple enzymatic reaction enabled conversion between the...and one-ring pyrimidine base. This is a far more complex chemical task, not a job for a single enzyme. ...bind DNA, Cas9 requires (1) a guide RNA, (2) a complementary DNA sequence, and (3) a protospacer-adjacent...that site is filled depends on cellular factors. Multiple labs tried to identify beneficial factors to include...separate and preventing repair based on the complementary strand. This could explain why the edited U ...original G is not primarily converted back to a complementary C. Optimized base editing with eOPTI-CGBE and...so the Yidi Sun and Erwei Zuo labs tested and implemented several of these advances for CGBEs (Yuan et ...

  9. Starter Guide to induced Pluripotent Stem Cells (iPSCs) Part 2:  Reprogramming and Transdifferentiation

    Type
    Blog Post
    Published
    Nov. 6, 2018, 1:12 p.m.
    ...reprogramming factors can be delivered and expressed in multiple somatic cells via various methods. Some of the...directed differentiation.” Specific cell media, supplements, bioactive small molecules, and growth factors...natural transdifferentiation is rare in mammals, an example is observed in the pancreas when excess β-cell ...1987, Davis et al. reported one of the earliest examples of transdifferentiation in vitro where treatment... of interest for in vivo transdifferentiation. Multiple cell types such as fibroblasts, hepatocytes, and...vitro Both in vitro and in vivo Epigenetic marks Complete removal to convert to iPSCs and re-establishment...major processes by which cells are converted to replenish and repair cells that are lost or damaged. Both...

  10. CRISPR Activation: A Practical Guide

    Type
    Blog Post
    Published
    Aug. 18, 2016, 2:30 p.m.
    ...certain loci to create changes in phenotypes. For example, CRISPR activation has been used to differentiate...gRNAs targeting every gene in the human genome for example, can be made easily and cheaply using oligo library...allows for exploratory-based research as well. For example, CRISPRa can be used to find potential cancer drug...et al., 2019). Because of its ability to target multiple gene loci simultaneously, CRISPRa can also be ...(Chavez et al., 2015)) are good choices across multiple cell lines (HEK293T, MCF7, U2-OS, Hela, N2A, 3T3...Church G (2016) Comparison of Cas9 activators in multiple species. Nat Methods 13:563–567 . https://doi....transcriptional activation by an engineered CRISPR-Cas9 complex. Nature 517:583–588 . https://doi.org/10.1038/nature14136...

  11. Neuronal labeling with Spaghetti Monster

    Type
    Blog Post
    Published
    Aug. 14, 2018, 12:42 p.m.
    ... The central nervous system (CNS) orchestrates complex processes enabling organisms to control their movements...the visible spectrum, researchers can also use multiple FPs in single experiments and visualize numerous.... smFPs are literally composed of FPs fused to multiple epitope tags. Indeed, to create the smFPs Looger...labeling of these fine structures through their multiple, high-affinity binding sites for primary antibodies...expressed and/or similar proteins Through their multiple, highly specific antibody binding sites and primary...used to distinguish highly similar proteins. For example, N-cadherin (cadherin-2) is a postsynaptic cell...super-resolution STORM imaging, and electron microscopy. Sample preparation for these techniques sometimes makes...

  12. Tips for Writing a Good Cover Letter

    Type
    Blog Post
    Published
    May 21, 2024, 1:30 p.m.
    ...specific examples. Instead of saying “I have excellent communication skills” try giving an example, like ...application process, it's a good idea to talk to people in the field to understand what the norms are. ...match the job requirements, by giving specific examples of your work and explaining how your experience...pointing to your transferable skills. In the above example, if you don’t have experience with ddPCR, but do...beginning is often the hardest part, here are some examples to get you started! Dear Dr./Professor [last ...strengthened an application. Even so, there were examples of great hires who hadn’t submitted a cover letter... Multiple Authors...

  13. Data Freedom: The Expansion of Data Sharing in Research Publications

    Type
    Blog Post
    Published
    Aug. 5, 2014, 6:51 p.m.
    ...of storage. For example, mouse behavioral geneticists may track the motion of multiple animals on different...limiting numbers of figures such that many have multiple, complex panels. PLOS, itself, has not finalized its...Sharing Policies, etc.) and is founded on the principle that scientific publications must contain enough...some data, etc.  The firestorm that followed implementation of the policy comprised of numerous objections... paper are in scope. For images, the number of examples supporting the published material is a factor ...collections and interpretation of data, publishing complete data, rather than just a single projection of ...

  14. Scientist Networking: What is an Informational Interview?

    Type
    Blog Post
    Published
    July 1, 2014, 3:42 p.m.
    ...Benjamin Franklin Effect, most people actually enjoy helping (just ignore the people too busy to respond to you...can do during your training is meet interesting people doing interesting things. I call this building ...insights you will get from the interaction. Most people like to help One good place to look for interesting...Sharing a school is a little connection that many people honor. Talking with strangers is usually challenging... with strangers. Be bold in asking all kinds of people to connect with you and to share their stories....uncover interesting opportunities by meeting with people working in diverse and unusual fields. My favorite...

  15. Easing the Protein Purification Process with pCri

    Type
    Blog Post
    Published
    June 19, 2015, 3:08 p.m.
    ...out of protein purification through simple and efficient multiplexing. pCri plasmids are divided into two...schematic below), enabling a researcher to test multiple tags for one protein quickly and easily. These...one need to remove the tag post-purification. A sample of pCri constructs: pCri-1a, -4a and -9a. 6xHis...on these and other tags used in the pCri system, please see Plasmids 101: Protein Tags. Beyond E. coli...purification. For a more thorough introduction to pCri, please see the original publication cited below. pCri ...plasmids are available either individually or as a complete kit from Addgene. References 1. Goulas, Theodoros...

  16. CRISPR 101: Engineering the Plant Genome Using CRISPR/Cas9

    Type
    Blog Post
    Published
    Oct. 11, 2016, 2:30 p.m.
    ...plants using the same general experimental design principles developed in other model organisms (see our CRISPR... CRISPR guide for common CRISPR principles). However, plant-specific modifications to commonly used CRISPR...cloning required. As with other model systems, multiple gRNAs can be expressed to modify several genomic...genomic loci at once (get more information on multiplexing gRNAs here). Cas9 is commonly tagged with a nuclear...longer RNAs (such as mRNAs for gene expression). Examples of commonly used RNA pol II promoters for Cas9...delivery and expression in planta using chitosan-complexed single-walled carbon nanotube carriers. Nat Nanotechnol...Zhang Y, Qi Y (2015) A CRISPR/Cas9 Toolbox for Multiplexed Plant Genome Editing and Transcriptional Regulation...

  17. Site Directed Mutagenesis by PCR

    Type
    Blog Post
    Published
    Aug. 2, 2016, 2:30 p.m.
    ...are designed to be complementary, but each primer may extend beyond the complementary region as long as...with enzyme “B” detects primer multimerization (purple) which is evident by an increase in the size of... Primer Design As a rule of thumb, 11 bp of complementary sequence on either side of the desired mutation...A-overhangs (a feature used in TA-cloning). Such non-complementary bases at the 3’-end interfere with plasmid reconstitution...that any residual parental plasmid (usually from incomplete DpnI digest) can also form colonies under these...particularly relevant in cases where a large plasmid with multiple functional regions is used as template for the.... Breslauer, Kenneth J., et al. "Predicting DNA duplex stability from the base sequence." Proceedings ...

  18. Fluorescent Proteins 101: When GFP lets you down

    Type
    Blog Post
    Published
    Aug. 23, 2018, 12:05 p.m.
    ...to the popularity of GFP including (i) fast and complete maturation to functional, fluorescent protein ...endogenous fluorescent co-factors can be used. Examples include the LOV domains that bind flavin (Buckley...under acidic conditions, with pKa values below 4. Examples include mTurquoise2 (pKa = 3.1), tagRFP (pKa =...diameter of about 2.4 nm (Hink et al., 2000). The complete beta-barrel is necessary for its fluorescence ...specifically and with high affinity to fluorophores. Examples are the FlAsH tag, the His tag and several others... bind the molecule of interest. For instance, pleckstrin homology domains can be used to detect specific... proteins are also a better choice for thicker samples. Another solution to avoid autofluorescence is ...

  19. CRISPR 101: Homology Directed Repair

    Type
    Blog Post
    Published
    Jan. 26, 2023, 2:15 p.m.
    ...recombination intermediates can then resolve to complete the DNA repair process Homology directed repair...happen on the crossing strand (horizontally at the purple arrows) or on the non-crossing strand (vertically...is elongated and ligated to fill the gap, thus completing SDSA.   Break-induced repair (BIR) pathway BIR... and even easy. This targeted-break technology coupled with HDR is a powerful site-specific knock-in tool... uses reverse transcriptase to generate the complementary ssDNA. Easi-CRISPR was shown to increasing editing...series was designed to help explain the basic principles driving CRISPRs and genome editing technology...Pfeiffer P, et al. Mutagenesis (2000). PubMed. Multiple Pathways of Recombination Induced by Double-Strand...

  20. New Viral Vectors - Fall 2024

    Type
    Blog Post
    Published
    Oct. 3, 2024, 1:15 p.m.
    ...Optogenetics Ofer Yizhar New viral prep with multiple serotypes pAAV-Syn-FLEX-rc[ChrimsonR-tdTomato...Biosensors GENIE Project New viral prep with multiple serotypes pGP-AAV-GFAP-iGABASnFR2(no bind)...Biosensors GENIE Project New viral prep with multiple serotypes pGP-AAV-syn-iGABASnFR2-WPRE AAV1...Biosensors GENIE Project New viral prep with multiple serotypes pGP-AAV-syn-iGABASnFR2(no bind)-...Biosensors GENIE Project New viral prep with multiple serotypes pGP-AAV-syn-flex-iGABASnFR2-WPRE...Biosensors GENIE Project New viral prep with multiple serotypes Looking for more viral vectors... Multiple Authors...
Showing: 241 - 260 of 854 results