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We narrowed to 710 results for: tat

Showing: 161 - 180 of 710 results

  1. When is a Monomer not a Monomer? The Top Three Ways Your Favorite Fluorescent Protein Oligomerizes in Cells

    Type
    Blog Post
    Published
    April 19, 2016, 2:30 p.m.
    ...in an open inactive state, a closed active state, and an artificially active state due to closure by FP...The FP is confined to a plane and generally only rotates in 360°, increasing the probability that two FPs... and Citrine) can be monomerized with an A206K mutation [2]. Addgene has many of these constructs and ...used to determine if a protein is monomeric is sedimentation equilibrium analytical ultracentrifugation [...

  2. Genome-wide Screening Using CRISPR

    Type
    Blog Post
    Published
    Aug. 18, 2015, 2:30 p.m.
    ... (NHEJ), usually results in a loss-of-function mutation within the target gene. CRISPR can also be used...cells, with each cell or set of cells containing a mutation in a different gene. Libraries may be available...correspond to genes that confer drug resistance when mutated. Findings from this type of experiment can shed...requires the use of next-generation sequencing. Representation - Most libraries contain 3-6 gRNAs per target... gRNA within the population is key. Loss of representation due to enrichment or depletion of specific ...CRISPR screen. However, maintaining sufficient representation within your mutant population requires a massive...

  3. The CRISPR Software Matchmaker: A New Tool for Choosing the Best CRISPR Software for Your Needs

    Type
    Blog Post
    Published
    Nov. 3, 2015, 3:30 p.m.
    ...These insights are hard to appreciate without computational support. Indeed, rational sgRNA design is not...painstakingly assessed to something a bit more representative of the communities’ opinion. The trouble is...pool of CRISPR software embodies solutions that facilitate most experimental applications in CRISPR engineering...function can be found in their online tool’s documentation. Since Hsu et al., 2013, other tools have incorporated...target sites, off-target sites, scores and the statistics that go into calculating them. For this, some... hardware. This OpenCL dependency is a severe limitation, but the tool is fast enough that, if you’re ...Python script called SSFinder, but I find its implementation to be too slow for practical use. The R based...

  4. Getting to Know Expansion Microscopy

    Type
    Blog Post
    Published
    June 20, 2023, 1:15 p.m.
    ...inspiration behind ExM, how it works, and some of the limitations to keep in mind whether you are planning your...your specific targets. What are some of the limitations?  A “super-resolution” technique that uses common...great, right? But there is always a catch - some limitation of the technique that users should be aware of...First, expansion requires fixed samples. This limitation may be the both most obvious and least flexible...ensure the expanded images are still a good representation of reality. Third, expansion results in dimmer...density (Mikhaylova, et al. 2015).  Despite these limitations, ExM is a valuable tool, especially when paired...

  5. Course-Based Undergraduate Research Experiences (CUREs)

    Type
    Blog Post
    Published
    Feb. 9, 2023, 2:15 p.m.
    ... Albert Einstein might have put it best when he stated, “the value of an education . . . is not the learning...Provost, then a new faculty member at Minnesota State (and now Professor of Chemistry and Biochemistry...Community (MCC) that seeks to reduce barriers to implementation. Funded by the NSF (with Co-PIs Jessica Bell...Professor and Chair of the Biology Department at Keene State College in New Hampshire. He mentors undergraduates... Kowalski, J., Hoops, G., Johnson, J. 2016. Implementation of a collaborative series of classroom-based...Scientific Elite: Nobel Laureates in the United States. Free Press. New York. Resources MDH CUREs Community...

  6. Tips for arabidopsis transformation

    Type
    Blog Post
    Published
    Oct. 25, 2018, 1:23 p.m.
    ...Agrobacterium tDNA insertion likely precipitated domestication of sweet potatoes (Kyndt et al., 2015)! It sounds...plants. If your cultures have been incubated at stationary phase for too long, the cells in your culture...affected by the selection eventually. Genotype putative T1 transformants: When your T1 is on soil and .... et al. (2015) ‘The genome of cultivated sweet potato contains Agrobacterium T-DNAs with expressed genes... the National Academy of Sciences of the United States of America. National Academy of Sciences, 112(18...

  7. Hot Plasmids Spring 2024

    Type
    Blog Post
    Published
    May 23, 2024, 1:15 p.m.
    ...screens Improved prime editor PE7 Antibodies to facilitate SARS-CoV-2 research New viral vector preps of...-024-07259-6. PMID: 38570691. Antibodies to facilitate SARS-CoV-2 research   By Ashley Waldron Ready-to-use...HaloTag, Figure 4), they determined that an A122D mutation in the rhodopsin domain conferred several new ...potentials of fast-spiking neurons. The same A-to-D mutation in the related voltage indicator Ace2N-mNeon also...-microglia cells.      Figure 5: A) Representative confocal images showing GFP expression from...System By Vaibhav Kawde To circumvent the payload limitations of traditional AAVs, the Becirovic Lab has developed...

  8. Sonic Hedgehog? Sleeping Beauty? Learn About the Genes Behind Addgene’s Conference Room Names

    Type
    Blog Post
    Published
    April 2, 2019, 1:44 p.m.
    ...development, sex determination, and anterior-posterior segmentation (Jennings and Ish-Horowicz, 2008). Fruit flies...flies that contain a specific loss-of-function mutation in groucho have thick tufts of sensory bristles...with non-functional hedgehog exhibit abnormal segmentation during embryogenesis. Typically, regularly spaced...embryo depending on its concentration. Genetic mutations in SHH cause severe health conditions such as ...reconstructed a transposase system based on the naturally mutated and non-functional transposase gene found in salmonid...Nüsslein-Volhard, Christiane, and Eric Wieschaus. "Mutations affecting segment number and polarity in Drosophila...

  9. Changing Labor Laws Bring Increased Postdoc Wages

    Type
    Blog Post
    Published
    Oct. 25, 2016, 2:30 p.m.
    ...under this ruling, regardless of visa or fellowship status, in addition to certain staff scientists and those... salary was set at $47,476 and the date for implementation was set for Dec 1 2016. In order to be exempted...paid. Institutional salary policies are one indicatator of how salaries may changes due to the FLSA. ... The University of Notre Dame sets no minimum, stating that while they recommend NRSA levels, postdocs...not to be tracked. University of Buffalo and Ohio State both have minima of $30,000, and raising salaries...addition, both Brown and Brandeis universities have stated that they consider postdocs paid on stipends to...

  10. CRISPR 101: Which Cas9 Do I Choose for My CRISPR Experiment?

    Type
    Blog Post
    Published
    Oct. 13, 2022, 1:45 p.m.
    ...engineered by introducing Cas9-mediated frameshift mutations in the gene of interest. The genomic target for...for Cas9 and the introduction of this mutation can be any site early in the coding region of the gene ... experiments may require the introduction of a mutation at a specific site e.g., deleting the catalytic...modification at a defined amino acid to mimic a patient mutation or maybe to disrupt a catalytic residue. Good ...to either cytosine or adenosine deaminases to facilitate a single base pair edit. (Cytosine deaminases...of activators include the SunTag system which facilitates recruitment of multiple activation domains to...

  11. Tips for CRISPR Gene Editing in Mice

    Type
    Blog Post
    Published
    June 28, 2016, 10:59 a.m.
    ...how many pups will contain a mutation and many of the mice with the mutation will be homozygous for it in.../Cas9 for gene editing has expanded since its adaptation for use in mammalian cells in 2012-2013. Researchers...region. Or you may even wish to generate a point mutation and need to focus your attention to that particular...will require you to house mice that may have no mutation, costing money and space. As a rule, screen all... et al. "One-step generation of mice carrying mutations in multiple genes by CRISPR/Cas-mediated genome...

  12. Important Considerations in Optogenetics Behavioral Experiments

    Type
    Blog Post
    Published
    Oct. 1, 2015, 2:30 p.m.
    ...Garret D., et al. "Excitatory transmission from the amygdala to nucleus accumbens facilitates reward seeking...to your field. Ultimately, your question should dictate your behavioral output. However, regardless of ...behavioral test in which your circuit of interest is putatively involved in regulating the behavioral output....2) there is some problem with the technical implementation of your optogenetics setup (viral expression...and anxiety along the dorsoventral axis of the dentate gyrus." Neuron 77.5 (2013): 955-968. PubMed PMID...

  13. Plasmids 101: E. coli Strains for Protein Expression

    Type
    Blog Post
    Published
    Feb. 10, 2015, 3:06 p.m.
    ... with sub-optimal codon usage (Table 1) A few mutations are common to all or most expression strains to...levels including:  ompT: Strains harboring this mutation are deficient in outer membrane protease VII, ...methylate DNA. dcm: Similarly, strains with this mutation are unable to methylate cytosine within a particular...Tetracycline RecA-deficient; best for plasmids with repetative sequences.  F- ompT lon hsdSB (rB- mB-) gal ... of unstable proteins Tuner (DE3)   Contains mutated lac permease whch allows for linear control of ...Contains highly active thioredoxin reductase and glutathione reductase to faciliate proper folding; may increase...

  14. Targeting HIV-1 with CRISPR: Shock and Kill or Cut it Out?

    Type
    Blog Post
    Published
    May 10, 2016, 2:30 p.m.
    ...and CRISPR/Cas9 have also been used to create mutations in genes essential to HIV-1 replication. However...CRISPR therapies through PAM or seed sequence mutations. Multiple gRNAs could be used to combat this problem...LTRs or essential genes. Many of these escape mutations were located near the Cas9 cut site, leading Wang...escape occurs in an animal model. If these escape mutations are frequent, the dCas9-mediated “shock and kill... Zhang T, Li F, Yang W, Kaminski R, Fagan PR, Putatunda R, Young WB, Khalili K, Hu W. CRISPR/gRNA-directed... S, Wainberg MA, Liang C. CRISPR/Cas9-Derived Mutations Both Inhibit HIV-1 Replication and Accelerate ...

  15. Performing In Vivo CRISPR Screens Using the FITS Approach

    Type
    Blog Post
    Published
    May 2, 2024, 1:15 p.m.
    ...CRISPR screens in immune cells have identified many putative regulators of immunity. However, in vitro screens...approaches; (4) encodes a Thy1.1 selectable marker to facilitate the isolation of modified cells; and (5) is compatible...molecular identifiers, which can improve the statistical power of in vivo screens. Figure 1: Using...used the pRDA_526 vector to knock out 30 genes putatively involved in CD8+ T cell responses to cancer. ...pRDA_526 vector. Moreover, the screen identified putative novel regulators of CD8+ T cell responses in tumors...

  16. Keeping Up With CRISPR/Cas9

    Type
    Blog Post
    Published
    March 11, 2014, 5:55 p.m.
    ...that CRISPR's could be used to correct disease mutations, both in mice and in human cells. But that important...genes in one step without producing off-target mutations," Sha was quoted as saying when the news first...blogger Caroline LaManna put it well: "Wow, custom mutations in monkeys already. I know we've discussed it ...news was circulating. Scientists at North Carolina State, in the labs of Chase L. Beisel and Rodolphe Barrangou...structure may help us engineer around the current limitations of the Cas9 complex," said study author F. Ann...

  17. A Control for All Seasons

    Type
    Blog Post
    Published
    Oct. 5, 2023, 1:15 p.m.
    ...positive and negative controls to ensure proper interpretation of results. A positive control is generally...the precision and accuracy and therefore the statistical power of an experiment. Technical replicates ...autofluorescence, also interferes with data interpretation and can be addressed with a label control. ...autofluorescence and should be considered in the interpretation of results. Include the label control for all...membrane. A loading control is critical for data interpretation, especially when changes in protein expression...Waters, Jennifer C. “Accuracy and Precision in Quantitative Fluorescence Microscopy.” Journal of Cell Biology...

  18. Viral Vectors 101: Optogenetic Tools

    Type
    Blog Post
    Published
    June 27, 2023, 1:15 p.m.
    ...Bicistronic vectors combine excitation and inhibition by using both excitatory and inhibitory channels activated...light within a specific range of wavelengths. Excitatory channels allow positively charged ions such as... the opsin.      Figure 2: Diagram of excitatory (ChR2) activation by light showing ions flowing...signaling cascade that may go awry in a disease state.      Figure 4: Example of an intracellular..., H. (2019). Light-activated chimeric GPCRs: Limitations and opportunities. Current Opinion in Structural...

  19. PiggyBac-ing Through the Genome Editing Field

    Type
    Blog Post
    Published
    May 31, 2016, 3:30 p.m.
    ...and a transposase. The piggyBac™ transposase facilitates the integration of the transposon specifically...completely seamless manner, leaving no sequences or mutations behind. Furthermore, piggyBac™ offers a large ...achieved using the piggyBac™ transposase, which facilitates direct integration of the donor-transposon (carrying...standard homology directed repair template to facilitate the selection of cells containing your desired...excision-only piggyBac™ transposase (PBx), which contains mutations making it competent for excision, but defective...primarily two other ways to create specific point mutations by gene editing. First, instead of using piggyBac...

  20. Plasmids 101: Restriction Cloning

    Type
    Blog Post
    Published
    Feb. 18, 2016, 3:42 p.m.
    ...to be placed into the backbone in the proper orientation. For instance, if you were cloning a gene into...and HindIII. To place your gene in the proper orientation downstream of the promoter, you can add an EcoRI... promoter and placing the gene in the proper orientation. You then add ligase to the mixture to covalently... the backbone in either a forward or reverse orientation so you’ll need some way to verify that the insert...generally lyse the bacteria; add chemicals to precipitate out the high molecular weight genomic DNA; filter...your ligation, then you will need to verify the orientation of your insert. You may want to design a diagnostic...
Showing: 161 - 180 of 710 results