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  1. xCas9: Engineering a CRISPR Variant with PAM Flexibility

    Type
    Blog Post
    Published
    March 28, 2018, 6:52 p.m.
    ...xCas9 3.6 displayed the second best PAM range. Characterizing xCas9 in mammalian cells Hu et al. compared...SpCas9. Hu et al. performed GUIDE-seq analysis to characterize genome-wide off-targets, since increasing PAM... with NGS) are shown as percentages, with fold changes compared to SpCas9 in parentheses. The development...
  2. Transferable Skills Guide: Managing a Team

    Type
    Blog Post
    Published
    Jan. 30, 2018, 2:42 p.m.
    ...individuals in your team you will have a much better chance of creating a high-performing team - which is every.... Personally I found this to be particularly challenging. As PhD students and postdocs we are used to ...the feedback, but at least you can start making changes for the best. Positive feedback is equally as important...
  3. 3D Printing Meets CRISPR Cas9

    Type
    Blog Post
    Published
    Oct. 17, 2017, 12:55 p.m.
    ...Byron Rubin, a crystallographer working with Jane Richardson, provided an initial solution to this problem...problem with the development of Byron’s Bender – a mechanical device that could be used to bend 1/8th inch ... the nascent polypeptide emerges from the exit channel.   He then said “I hadn’t realized how perfectly...
  4. Mobile-CRISPRi: Bringing CRISPRi to Diverse Bacteria

    Type
    Blog Post
    Published
    April 4, 2019, 12:53 p.m.
    ... to lab-adapted bacteria because it has been challenging to introduce CRISPRi machinery into diverse bacteria...antibiotics are often essential genes which creates a challenge when studying them since their complete knockdown...been a target for trimethoprim, there would be no changes in sensitivity. Pooled knockdowns are also possible...
  5. Plasmids 101: Protein Expression

    Type
    Blog Post
    Published
    June 7, 2018, 1:17 p.m.
    ... be translated at the ribosome into polypeptide chains that make up the primary structure of proteins.... however, are expensive and very technically challenging to use. Alyssa D. Cecchetelli is a Scientist... expression in Escherichia coli: advances and challenges Production of recombinant proteins in plant root...
  6. The Scientific Conference Poster Session: Tips for Success

    Type
    Blog Post
    Published
    Aug. 29, 2019, 12:50 p.m.
    ... about his/her background. This will give you a chance to determine how to tailor your presentation so...sought out your poster, but will also give you a chance to slow down and catch your breath before diving... contact with the presenter after the session. Exchange business cards or jot down their name and affiliation...
  7. Experimenting with New Careers while in Grad School

    Type
    Blog Post
    Published
    Feb. 25, 2016, 3:30 p.m.
    ...gave me a place to go once a week to get recharged. The fun change of pace helped break up the negativity...BadAstronomer, Emily Graslie from The Brain Scoop YouTube channel @Ehmee, and David Shiffman @WhySharksMatter and...
  8. Troubleshooting and Optimizing a Western Blot

    Type
    Blog Post
    Published
    Sept. 17, 2024, 1:15 p.m.
    ... protein aggregation, you may want to consider changing your incubation temperature. Some proteins aggregate...kDa) and a 0.45 µm (p) membrane for larger ones. Changing your membrane size is probably the easiest troubleshooting...alcohol. The increased SDS will increase the negative charge on the protein, allowing it to move more readily...Posttranslational modifications Check literature Highly charged amino acids Run control protein (if available...
  9. INTEGRATE: Bacterial Genome Engineering Using CRISPR-Transposons

    Type
    Blog Post
    Published
    Dec. 7, 2020, 2:53 p.m.
    ...CRISPR-associated Transposase) by the Zhang group. Mechanism of CRISPR-transposons One of the CRISPR-transposon...in each type of CRISPR-Transposon system. (B) Mechanism of RNA-guided transposition in type I-F INTEGRATE...bp target-site duplication (TSD), a hallmark characteristic of the Tn7-family of transposons. Insertion...
  10. CRISPR 101: RNA Editing with Cas13

    Type
    Blog Post
    Published
    July 31, 2020, 12:30 p.m.
    ...adenosine to inosine in RNA, creating a functional A->G change. They fused ADAR deaminase domains (ADARDD) to ...introducing a C opposite the target A to be edited. This change specifies the edit to be made when multiple As ... their RESCUE (RNA Editing for Specific C-to-U Exchange) system (Abudayyeh et al., 2019). To avoid some...
  11. Plasmids 101: Secondary Nanobody Toolbox

    Type
    Blog Post
    Published
    Feb. 27, 2018, 2:04 p.m.
    ... an unusual type of IgG antibody called a heavy chain antibody (HCab), which are unique to camels, llamas...and meticulously screening, optimizing, and characterizing several anti-mouse and -rabbit nanobodies. ...secondary nanobody, it’s important to review a few characteristics of your primary antibody: species it was raised...
  12. Negative Can Be Positive: Open AAV Data with Addgene

    Type
    Blog Post
    Published
    Sept. 6, 2022, 1:15 p.m.
    ... peripheral nervous system presents a special challenge to scientists. What works well in one cell or ...vectors in neuroscience Let’s consider my first challenge when I started working with AAV vectors. I wanted...specifically to allow scientists to evaluate how small changes in vector administration can influence AAV expression...
  13. Summer SciComm Series: Modes of Communication

    Type
    Blog Post
    Published
    July 1, 2022, 1:15 p.m.
    ...graphics for visuals. However, it’s much more challenging to design a hands-on interactive activity using...Flexible. Low barrier to entry. Ample distribution channels both digitally and physically. Easy to incorporate...Media Medium to high Combines pros of multiple channels/balance out cons. Flexible. Can allow people to...
  14. Minigenomes - a Safe Way to Study Dangerous Viruses Like the Ebola Virus

    Type
    Blog Post
    Published
    March 17, 2016, 2:30 p.m.
    ...investigate viral processes in extreme detail. The mechanism of a particular observation can be easily studied...viral sequences (e.g. promoters) can be studied by changing the minigenome cis-acting sequences and monitoring...24093048. PubMed Central PMCID: PMC3787895. 6. Weik, Michael, et al. "The Ebola virus genomic replication promoter...
  15. Tips for Screening with Yeast Two Hybrid Systems

    Type
    Blog Post
    Published
    Oct. 22, 2015, 2:30 p.m.
    ...Two hybrid systems were developed in Saccharomyces cerevisiae in 1989 and are still used extensively ...host strain can help. In order to reduce the chance that the configuration of your fusion proteins ...J.L., Boles, E., André, D., and Frommer, W.B. K+ channel interactions detected by a genetic system optimized...
  16. How to Write a Scientific Review Article

    Type
    Blog Post
    Published
    Feb. 16, 2017, 3:30 p.m.
    ... and forth with. That being said, we probably exchanged dozens of drafts of the manuscript. This is the...transform the document into something cohesive-- change the sentences, make it flow, and start telling ...Overall, writing a review can be overwhelming and challenging. My best advice is don’t overthink it. And to...
  17. Tips for CRISPR Gene Editing in Mice

    Type
    Blog Post
    Published
    June 28, 2016, 10:59 a.m.
    ...pre-designed plasmids containing these variants ready for purchase. But what is the easiest and fastest way to use...choose the most effective ones to increase your chances of gene modification in vivo. Find Plasmids for...than the delicate RNA and therefore there has less chance of contamination with RNase leading to degradation...
  18. Transferable Skills Guide: External Collaborations

    Type
    Blog Post
    Published
    April 19, 2018, 1:25 p.m.
    ..., I often found people outside my university approachable, friendly, and helpful. Finally, don’t forget...relationships. Personally, I find this to be the most challenging and time-intensive part of relationship building...people outside your organization just to have a quick chat can be rather tricky (think people based in different...
  19. The PAM Requirement and Expanding CRISPR Beyond SpCas9

    Type
    Blog Post
    Published
    Aug. 20, 2020, 2:30 p.m.
    ... PAMs, respectively (Walton et al., 2020). Characterization of Cas9 from additional bacterial species ...additional Cas9 species PAM sequence may not be characterized Non-SpCas9's bind a variety of PAM sequences.... Furthermore, non-SpCas9's may have other characteristics that make them more useful than SpCas9. For...
  20. Beyond the Blood Brain Barrier: PHP.B Enters the Central Nervous System Via the LY6A Receptor

    Type
    Blog Post
    Published
    July 23, 2019, 12:46 p.m.
    ... PHP.B. The Deverman lab started by seeing how changes in LY6A’s expression affected PHP.B’s transduction...check out these two references: Dayton, Robert D., Mychal S. Grames, and Ronald L. Klein. "More expansive...were engineered, check out these two references: Chan, Ken Y., et al. "Engineered AAVs for efficient noninvasive...
  21. Tips for Using FRET in Your Experiments

    Type
    Blog Post
    Published
    Nov. 5, 2014, 3:41 p.m.
    ...FRET has also been used to measure conformational changes, cleavage activity using FRET-based biosensors,...method useful for dynamic experiments in which FRET changes are large. Two other methods are commonly used... such as pH or autofluorescence background, can change the fluorescence decay time and have to be taken...
  22. Data Freedom: The Expansion of Data Sharing in Research Publications

    Type
    Blog Post
    Published
    Aug. 5, 2014, 6:51 p.m.
    ... but sufficiently annotated data used to create charts and tables in the paper are in scope. For images...end” figure or table, clicking on the published chart could reveal the underlying data and allow other...work against transparency. This opens science to charges of elitism and for scientists to be hiding behind...
  23. Quick Guide to Near-Infrared Fluorescent Proteins

    Type
    Blog Post
    Published
    Oct. 5, 2021, 1:15 p.m.
    ...blue-light controlled optogenetics, such as channelrhodopsins and tools based on light-oxygen-voltage (LOV...tell us about cellular events via  fluorescence changes occurring due to protein synthesis, degradation...developed based on mIFP6. Learn more about the characteristics, performance, and applications of near-infrared...
  24. Evolution of Brainbow: Using Cre-lox for Multicolor Labeling of Neurons

    Type
    Blog Post
    Published
    April 24, 2015, 2:39 p.m.
    ...OFP (orange), is expressed when Cre is absent; stochastic Cre excision results in one of three recombinations...First, the imaging of Brainbow mouse tissue was challenging due to low fluorescence intensity, caused partially...fluorescent proteins to find those with ideal characteristics (low aggregation, high photostability, and ...
  25. Is this the right place for me? 8 tactics for choosing a lab

    Type
    Blog Post
    Published
    Oct. 2, 2018, 12:56 p.m.
    ...or lab manager be your actual mentor? Is there a chance the supervisor will be moving on soon?   Will you...teaching the stuff you want to know and display character traits and skills that you hope to grow.  Find... you? Maybe you like things a bit hectic and challenging and this drives your best work. Or is it teamwork...
  26. Recombinase-based State Machines Enable Order-dependent Logic in vivo

    Type
    Blog Post
    Published
    July 28, 2016, 2:30 p.m.
    ...register and catalyzes their recombination, thereby changing the state of the RSM. If an attB-attP pair is ...general would benefit from a more comprehensive characterization of the recombinases at our disposal.  Many...Vectors Can Be Used for Genome Editing Learn about Michael Koeris' Journey from Grad Student to SynBio Entrepeneur...
  27. CRISPR 101: Off-Target Effects

    Type
    Blog Post
    Published
    Feb. 8, 2024, 2:15 p.m.
    ...activates/represses gene expression by various mechanisms. The RNA guide is typically 20 nts and the genomic...off-target events Even after you’ve reduced the chance of off-target effects, you still need to do your... knock-out cell line to perform downstream characterization of, isolating 2 or 3 distinct clones to perform...
  28. Plasmids 101: Restriction Cloning

    Type
    Blog Post
    Published
    Feb. 18, 2016, 3:42 p.m.
    ...matrix (usually agarose) to pull your negatively charged DNA through the gel. As indicated in the figure...the gel in wells positioned toward the cathode (- charge). When the voltage is applied across the gel, the... the DNA migrates toward the anode (+ charge). Larger fragments of linearized DNA migrate slower than ...
  29. Deep Dive: Statistical Tests (Comparisons)

    Type
    Blog Post
    Published
    March 7, 2023, 2:15 p.m.
    ...quantifies the likelihood that a result is due to chance vs. the factor that is being experimentally manipulated...) or skewed (see Fig. 2). Assumptions – characteristics of a data set; the ‘rules’ a statistical test...trial, for example).   Fig. 3: Question flowchart for choosing an ANOVA/MANOVA statistical test ...
  30. A Practical Guide to Optimizing AAV DIO and FLEx Vector Expression

    Type
    Blog Post
    Published
    Nov. 2, 2021, 1:15 p.m.
    ... Figure 2. Schematic diagram showing the mechanism of spontaneous reversion during AAV plasmid amplification...phenotype in a mixed population (Burger, C. 2004, Aschauer, DF. 2013, O’Carroll, SJ. 2021). This is due to...outcome.    References and resources References Aschauer DF, Kreuz S, Rumpel S (2013) Analysis of Transduction...
  31. Antibody Data Repositories and Search Engines

    Type
    Blog Post
    Published
    Oct. 31, 2024, 1:15 p.m.
    ...Antibodypedia Any Any Data repository   YCharOS Human proteins Immunoblot (western blot), IP...BioMolecular Atlas Program (HuBMAP)  Antibody Characterization Laboratory Cancer Any Data repository...
  32. CRISPR Cheat Sheet

    Type
    Blog Post
    Published
    Jan. 27, 2021, 2 p.m.
    ...template, CRISPR can be used to introduce a functional change in the DNA sequence. Base Editors: Modified versions...versions of CRISPR nucleases that make single base changes in the DNA sequence without completely cutting ...
  33. New Podcast Segment: Hot Plasmids

    Type
    Blog Post
    Published
    May 17, 2017, 3:37 p.m.
    ...covered in this segment Hot Plasmid 1: CRISPR X from Michael Bassik's Lab - A new tool for making diverse, localized...this kit to complement unused auxotrophies in Saccharomyces strains.  Listen to Our Segment on The Yeast...
  34. Countdown to Halloween @Addgene

    Type
    Blog Post
    Published
    Oct. 29, 2014, 5:26 p.m.
    ...(old board games and movies can provide great character costumes). All of this costume planning is for...guess each plasmid? Our lab paid tribute to the changing seasons – and they also invited Father Time to...
  35. Newly Updated AAV Data Hub!

    Type
    Blog Post
    Published
    Feb. 7, 2023, 2:15 p.m.
    ...dendritic spines!  Curious? Watch our AAV Data Hub Challenge recording to see two reports presented by the ...report describes a functional vector such as a channelrhodopsin Images showing the injection site as well ...
  36. Congratulations, Deck The Lab winners!

    Type
    Blog Post
    Published
    Jan. 14, 2021, 1:30 p.m.
    ...created a microbe advent tree displaying over 25 archaea, bacteria, fungi, and viruses. Final tree with...MicrobeAdventCalendar ornament set (plus more!) It features archaea, bacteria, fungi, viruses, and one microbe ornament...
  37. Make a Splash: Notions of Scientific Impact Are Evolving

    Type
    Blog Post
    Published
    Dec. 5, 2014, 2:54 p.m.
    ... Considering citations to all articles, Anurag Acharya and colleagues report, the percentage of citations...has increasingly moved online, surely times have changed. Altmetrics.org calls to expand our view of what...
  38. A Scientist's Guide to Ebola

    Type
    Blog Post
    Published
    Oct. 16, 2014, 3:01 p.m.
    ...through the air and that’s considered unlikely to change – but the illness has been fatal in 70 percent ... Ebolavirus (EBOV) is a Filovirus, a family characterized by single, linear, negative-sense, single-stranded...
Showing: 441 - 480 of 792 results