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We narrowed to 799 results for: Des

Showing: 121 - 140 of 799 results

  1. Plasmids 101: Shuttle Vectors

    Type
    Blog Post
    Published
    May 20, 2025, 1:15 p.m.
    ...affects all kingdoms of life. Of course, that includes you. Besides the risk to the researcher, Zeocin has been...most yeast vectors and many mammalian vectors are designed to shuttle between species. Figure 1: Shuttle...host’s replication machinery. A shuttle vector designed for unrelated bacteria should include oris for...target species. Fun fact! Plant vectors are usually designed to shuttle between E. coli and Agrobacterium tumefaciens...protects against any of them. But different aminoglycosides work on different host species: kanamycin targets...media that supplies the key nutrient. The vector provides the missing synthesis machinery, and the cells...image for individual analysis. A shuttle vector designed for this approach in a mammalian cell experiment...

  2. New Tools Enable CRISPRa for Neuroscience Applications

    Type
    Blog Post
    Published
    July 2, 2019, 12:51 p.m.
    ...Patrick Miller-Rhodes from the University of Rochester Medical Center. Patrick Miller-Rhodes is currently...This post was contributed by Patrick Miller-Rhodes, a Ruth L. Kirschstein NRSA Predoctoral Fellow at ...this technological gap, a trio of recent papers describe the development of CRISPR activation (CRISPRa)... large size of Cas9 activators, which largely precludes delivery by adeno-associated vectors (AAV). This...packaging capacity than AAV. Such an approach was described recently by the Day Lab, who developed neuron-... selected the immediate-early gene Bdnf, which encodes brain-derived neurotrophic factor (BDNF). Bdnf ...High-throughput screening strategies Although the tools described above make CRISPRa more accessible to neuroscientists...

  3. Supporting Reproducibility with a Connected ELN

    Type
    Blog Post
    Published
    Jan. 17, 2019, 1:38 p.m.
    ...reproducibility than others. Unfortunately, most ELNs are designed as closed ecosystems and act as data silos because...RSpace ELN supports reproducibility RSpace was designed in response to requirements that emerged from ...used in research, and data repositories. Below I describe how each of these kinds of connectivity facilitates... in institutional and lab servers specifically designed to hold large amounts of data. Although it may... use of other tools they use in research. This includes chat apps like Slack, Microsoft Teams, and Google...individual documents or more complex datasets into the desired repository. They also support entry of required...deposits will be made. The Dataverse integration is described in this video and the Figshare integration in ...

  4. Plasmids 101: Positive and Negative Selection for Plasmid Cloning

    Type
    Blog Post
    Published
    Aug. 22, 2019, 12:43 p.m.
    ...property by including ccdB on its destination plasmids. In the destination plasmid, the ccdB gene is flanked... rest do not grow. While there are many ways to design your positive selection strategy, here are a few...straightforward in cases where the inserted DNA includes an antibiotic resistance marker. After transformation...grow. However, often times, the plasmid backbone includes an antibiotic resistance cassette and you aren...backbone contains your gene of interest. Auxotrophy Besides antibiotic selection, you can select for a successful...prototrophy come into play during cloning if you’ve designed your experiment using an auxotrophic strain of...sites. To introduce a gene of interest into the destination plasmid, recombination sites must first be added...

  5. The Fluorescent Vegetables in Aptamer Soup

    Type
    Blog Post
    Published
    Jan. 29, 2019, 2:27 p.m.
    ...Aptamer Fluorophores describes the enrichment process used to evaluate oligonucleotides for binding affinity...of Spinach. In doing so, they identified the nucleotides that contribute to the instability of Spinach...similar levels of fluorescence when bound to DFHBI despite being approximately half the length (Warner et ...also smaller than any form of Spinach - only 49 nucleotides in length - and is better able to maintain its... of colors, so do aptamers! Corn was recently described in 2017 (Song et al., 2017). Corn naturally dimerizes... Red and orange fluorescent aptamers Corn was described in the same study as Red Broccoli and Orange Broccoli...Broccoli, and share similar properties to Broccoli despite binding to a different small molecule. Notably,...

  6. Site Directed Mutagenesis by PCR

    Type
    Blog Post
    Published
    Aug. 2, 2016, 2:30 p.m.
    ...for the desired modification. Finally, the positive clones are sequenced to confirm the desired modification...Primer Design As a rule of thumb, 11 bp of complementary sequence on either side of the desired mutation...introduced to plasmids using primers (with the desired mutation) in a PCR protocol that amplifies the ...mutated clones. Forward and reverse primers are designed to be complementary, but each primer may extend...Polymerase To ensure that you don’t introduce undesired mutations through the PCR process, you need a ...The resistance marker from the parental plasmid provides a mean for selecting for transformants which have...mutagenized plasmids Once constructs containing the desired modification have been identified (and confirmed...

  7. Pushing the Limits of DNA Assembly

    Type
    Blog Post
    Published
    Sept. 6, 2017, 1:01 p.m.
    ... Addgene plasmids by gene here), designing primers with your desired mutation, performing PCR to generate...multiple fragments of DNA to create a synthetically designed DNA sequence. There are multiple methods of DNA...purification steps and end-repair steps with well-designed fragment overlap sections, while still creating... guide you through both experimental and primer design based on fragment sequences and the polymerase ...enzymes are adjusted. Appropriate fragment and primer design results in covalently joined, scarless DNA – perfect...by assembling multiple fragments containing the desired mutations. This same process can be used simultaneously...oligo that contains a region of homology and any desired edits to the target region. Assembled plasmids ...

  8. Components of CRISPR/Cas9

    Type
    Blog Post
    Published
    Feb. 2, 2016, 5 p.m.
    ...express a gRNA designed to direct Cas9 to their target sequence of choice (see tips for designing a gRNA) and... of the major CRISPR lingo and will be able to describe the functions of the various CRISPR/Cas9 components...responsible for processing foreign DNA as well as the RNA guides required for endonuclease function, when used for...Bind to a guide RNA The guide RNA, which will be described in more detail below, enables Cas9 to cut a specific...DNA damage is a DSB within the target DNA ~3-4 nucleotides upstream of the PAM sequence. Cas9 Species/Variants...with the appropriate PAM sequence) to modify the desired genomic locus.   Some historical notes CRISPR ... combined with its adjacent spacer, ultimately encodes a single crRNA. The direct repeat regions contain...

  9. Hot Plasmids - May 2022

    Type
    Blog Post
    Published
    May 26, 2022, 1:15 p.m.
    ... error rate for long sequence knock-ins Visual barcodes for live cell clonal multiplexing Improving ...nanobody-GFP interaction). The modularity of the system provides researchers better flexibility and makes the approach...other experiments. And, while the BLITZ system was designed and optimized with zebrafish in mind, it can easily...https://doi.org/10.1038/s41556-021-00836-1 Visual barcodes for live cell clonal multiplexing by: Rachel Leeson...Recently, Ravid Straussman’s lab has developed visual barcodes for clonal multiplexing of cells in live imaging...peptide. By combining three different localization peptides with four different fluorescent proteins, and ...freeware.    Fig. 4: Images of 12 visual barcodes in use in A375 cell line. Image from Kaufman, ...

  10. CasPEDIA: A Functional Classification of Cas Enzymes

    Type
    Blog Post
    Published
    Jan. 25, 2024, 2:15 p.m.
    ... is also documented. Experimental design When you are in the design phase of your experimental planning...CasPEDIA is an online, searchable resource that provides summary information on Class 2 Cas enzymes. The...The information is organized in wiki format and includes biochemical properties, previously established...relevant resources The homepage displays a graphic describing CasIDs and relevant properties of Cas enzymes...What other RNA components are required? CasPEDIA provides information on crRNA and tracrRNA requirements... also show you how multiplexed arrays would be designed, if that’s your end goal. CasPEDIA also features...search (trans activity, multiplex ability, gRNA design, etc.). With this feature, you can compare different...

  11. Targeted Mutagenesis with EvolvR

    Type
    Blog Post
    Published
    Feb. 21, 2019, 1:15 p.m.
    ...diversification of all nucleotides at a user-defined loci in bacteria. Its modular nature provides versatility in...provide a means to continuously diversify all nucleotides within a user-defined genomic region. EvolvR,...method developed by the Dueber Lab at Berkeley, provides a new approach for generating novel genetic variants...users to achieve targeted diversification of all nucleotides within a defined region of a genome. Require...turbidostat. Only mutate particular types of nucleotides. Both the Bassik Lab and the Chang Lab have created...3’ end, while its native endonuclease activity degrades the displaced strand.   Figure 1: EvolvR...single starting cell. Additionally, multiplexing of guides allows EvolvR to target more than one genomic site...

  12. Prime Editing: Adding Precision and Flexibility to CRISPR Editing

    Type
    Blog Post
    Published
    Jan. 13, 2025, 9:49 p.m.
    ...site by the pegRNA — a guide RNA that also encodes the desired edit and homology to the genomic DNA locus...both specifies the target site and contains the desired edit (or edits) engages the prime editor protein...and the reverse transcriptase domain copies the desired edit, directly polymerizing new DNA onto the nicked...edit within what Fyodor Urnov refers to as “PAM deserts” in the genome. More versatile and precise than...editors are preferred. For instance, if target nucleotides are positioned within the canonical base editing...still almost always results in higher ratios of desired edits to indel byproducts than Cas9-initiated HDR...different constraints and affect how you select and design your prime editing tools. Here, we’ll briefly cover...

  13. Educational Planarian Tools for Teaching Developmental Biology Techniques

    Type
    Blog Post
    Published
    May 24, 2018, 1:20 p.m.
    ...A recent publication [1] from the Sánchez lab describes the plasmids and protocols required for both WISH...companion resource called “cutting class” which provides more detailed materials and protocol resources...synthetically made RNA (riboprobes) with modified nucleotides (for example, Digoxigenin-labelled Uracil) that... molecular cloning to insert the cDNA into the desired plasmid backbone. The Sánchez lab plasmids allow... which are available through the deposit) are described in the Sánchez lab publication [1] so that the...expressed mRNAs.These native mRNAs are subsequently destroyed by Argonaute-catalyzed nuclease activity or their...have to use a commercial E. coli strain that is designated as DE3. For Phagocata morgani and Phagocata gracillis...

  14. Plasmids 101: Modular Cloning

    Type
    Blog Post
    Published
    March 12, 2024, 1:15 p.m.
    ...cloning, or MoClo, is a systematic cloning strategy designed by synthetic biologists to perform large scale...specifically refers to the organizational schema described above, and not any particular cloning technique...example of an individual part, this category also includes promoters, UTRs, terminators, etc. Once selected...behave in a cell. For unpredictable cases, MoClo provides two answers: first, sets of parts with characterized...protein products can interact with the DNA that encodes the protein itself or other genes within the circuit...cellular engineering goal, several of which are described below. Multigene circuits assembled through MoClo...for more complex CRISPR experiments (e.g., many guides/parts delivered) in certain model organisms. In...

  15. 9 tips for a successful postdoctoral experience

    Type
    Blog Post
    Published
    Oct. 9, 2018, 12:21 p.m.
    ...for and how can you do it well? Below, I briefly describe some tips for a successful postdoc fellowship....typically writes the grants that fund your research, guides the research directions of the lab, gives you constructive...Thesis committee members provide expertise in designing and interpreting experiments, as well as career... there a tractable question or are you simply describing a phenomenon? Exploration can be important, but...presentations benefit from practice. If you simply recycle slides from the last time you gave a presentation to a...story I can tell with my data?  Can I make better slides that more effectively tell a story? Generally,...or functional models or more helpful background slides. If you don't have much new data, speculate on ...

  16. Plasmids 101: Protein Expression

    Type
    Blog Post
    Published
    June 7, 2018, 1:17 p.m.
    ...extremely useful if a desired protein product is toxic to cells at high concentrations. Despite their advantages...and induced by lactose, provides the highest level of protein expression. Despite their ease of use, it...for easier access and purification of a desired protein. Despite being a rather nascent technology, plant...for proper protein function. Most DNA constructs designed for mammalian expression utilize viral promoters...protein in bacterial cells: the pET, pRSET, Gateway pDEST, and pBAD vectors for example. Protein expression... include ribosomes, RNA polymerase, tRNAs, ribonucleotides and amino acids. Cell-free expression systems...

  17. Anatomy of a Plasmid Page at Addgene

    Type
    Blog Post
    Published
    Feb. 4, 2016, 3:30 p.m.
    ...Plasmid purpose: This is a brief description of what the plasmid was designed and used for in the depositing...plasmid, how will it be sent to me? Description: This describes how the plasmid or other product (kit... Gene/insert: This describes what has been inserted into the backbone, and provides information about ...successful cloning. Cloning information: This section provides useful information about how the vector was assembled... sequencing. Growth in Bacteria: This section describes how to grow the bacterial strain in which the ...relatively new feature of our plasmid pages, and provides a list of publications which have used the plasmid...

  18. Measuring Kinase Activity at the Single-Cell Level with Kinase Translocation Reporters (KTRs)

    Type
    Blog Post
    Published
    July 26, 2018, 12:46 p.m.
    ...reporters are challenging to design and difficult to multiplex. The Covert Lab provides an alternative tool with...fluorophores can be multiplexed together. Challenging  to Design: FRET reporter activity depends on both the distance...advantages. First, they are easy to multiplex. Their design allows flexible swapping of fluorescent proteins...overlap are used together. Second, KTRs are easy to design. The key determinants of KTR function are the positions...See Box 1 in Kudo et al. for more details on the design of the bNLS and NES sequences. Disadvantages of...translocation rates are another variable to consider when designing KTR experiments. Third, KTRs are not well suited...JNK, and ERK, or a backbone to use for custom KTR design, plasmids are available from Addgene! References...

  19. Capturing a Moment with Marc Zimmer’s “The State of Science”

    Type
    Blog Post
    Published
    July 30, 2020, 1:15 p.m.
    ... Zimmer provides several. In Part Three of the book, called simply “Old Science,” he describes the now...teaching and communicating science for over two decades, attempts to answer it in five paragraphs, with...recent resurgence of “Do-It-Yourself Science” described in Chapter 3, and of course the rapidly changing... science.”  The three chapters in this section describe the challenges of trusting science in a “fake ...changed significantly over the last decade. He describes the detection of gravitational waves--a story ...collaboration from scientists around the world. The paper describing the waves’ detection had over 1,000 authors. ...This last section of the book, Future Science, describes the author’s thoughts on science’s biggest challenges...

  20. New Optimized Genome-wide CRISPRko, CRISPRi, and CRISPRa Libraries

    Type
    Blog Post
    Published
    Oct. 4, 2018, 12:44 p.m.
    ...These libraries utilize optimized sgRNAs that were designed based on the rules identified in Doench et al....1,000 non-coding control sgRNAs. This library was designed to improve on-target activity while reducing off-target...with 6 sgRNAS, highlighting the benefit of sgRNA design in CRISPR libraries. Thus, the Brunello library... that if an essential gene plays a role in the desired screening phenotype, it may be missed because it's... the sgRNA metrics, confirming again that sgRNA design plays a significant role in library efficiency....CRISPRa, sgRNAs were targeted between 150-75 nucleotides upstream of the TSS. Similar to the Brunello ...Activation Mediator) uses an improved activator design that consists of inactive Cas9-VP64, a sgRNA with...
Showing: 121 - 140 of 799 results