Skip to main content

We narrowed to 801 results for: DES

Showing: 441 - 480 of 801 results
  1. CRISPR 101: Non-Homologous End Joining

    Type
    Blog Post
    Published
    April 16, 2015, 3:45 p.m.
    ...and does not consider the missing or damaged nucleotides that are common to biological sources of DSBs...better substrates for ligation. Although we do not describe these steps here, the processing of DNA ends tends...of the canonical Cas9 approach. A pair of CRISPR guides that flank regions of hundreds of base pairs or...
  2. Viral Vectors 101: An Introduction to AAV

    Type
    Blog Post
    Published
    May 30, 2023, 1:15 p.m.
    ...serotypes The names of AAVs contain two numerical designations, separated by a slash, that indicate the ITR...interested in expressing multiple small genes, you can design single rAAV vectors with multiple genes packaged... an option (McCarty et al., 2001). This AAV is designed so that the single stranded DNA folds back on ...
  3. Transferable Skills Guide: Public Speaking

    Type
    Blog Post
    Published
    April 20, 2023, 4 p.m.
    ...you labeled your gene of interest incorrectly on slides 8-16. Your notes disappear. The wrong version of... speaking is hard. Aside from the diving board charades, I doubt anyone but me remembers any of the incidents... biomedical field, with very little text on the slides and notes instead of written speeches. When you...
  4. Hot Plasmids April 2018 - Protein Degradation, Nanoscopy, FIRE-Cas9, and Yeast Expression Tools

    Type
    Blog Post
    Published
    April 23, 2018, 2 p.m.
    ...TRIM21 recruits ubiquitin and the proteasome to destroy antibody-bound pathogens. Clift et al. found that...necessary for studying endosomes, the Hell lab designed their super-resolution pH indicators (SRpHi) biosensors...sgRNAs are used with FIRE-Cas9, experiments can be designed to target multiple loci at once. In addition, ...
  5. Antibodies 101: Polyclonal Antibodies

    Type
    Blog Post
    Published
    July 14, 2021, 1:15 p.m.
    ...is tested following each immunization until the desired level of antibodies is reached - typically within...within 2-4 months. After the animal has the desired level of antibodies in its bloodstream, the antibodies...species. Pre-adsorbed polyclonal antibodies are designed for experiments where antibodies raised in several...
  6. Plasmid Tools for Microbiome Studies

    Type
    Blog Post
    Published
    June 27, 2019, 12:25 p.m.
    ...transfer origin as well as a selectable marker and a desired genetic payload (ex: GFP). Thus, cells can be both... RNA toehold switch, a RNA hairpin that can be designed to bind and detect nearly any RNA sequence. Downstream...components for gene disruption or CRISPRi. While designed to study the bee microbiome, these broad-host-...
  7. It’s Bioelectric! An Exciting Interdisciplinary Field of Research

    Type
    Blog Post
    Published
    Oct. 29, 2019, 2:52 p.m.
    ... In frogs, ectopic expression of ion channels, despite having an otherwise normal genomic background, ...Subsequent cutting results in a two-headed worm, despite the fact that it’s genetically wild type  (Oveido...fluorescent voltage indicator with near-complete desensitization in continuous light. ArcLight Q239 - A GEVI...
  8. Human Germline Editing Using CRISPR

    Type
    Blog Post
    Published
    Aug. 10, 2017, 2:19 p.m.
    ...donated skin, blood and semen samples. Ma et al. designed plasmids containing Cas9 and two different gRNAs... at 3 days post fertilization. Since Ma et al. designed a repair template with two synonymous mutations...thus quieting some fears about the creation of “designer babies.” The differences in editing between iPS...
  9. CRISPRainbow and Genome Visualization

    Type
    Blog Post
    Published
    Feb. 28, 2017, 3:30 p.m.
    ...ortholog requires a different PAM sequence, a gRNA designed for one dCas9 should be specific to that ortholog...boxB Magenta boxB-MS2 White boxB-MS2-PP7 Despite the success of Ma et al.’s approach, fluorescently...genome editing. Such a system has been previously described for transcriptional activation/repression and ...
  10. Teaching an Old DOG New Tricks: Controlling Protein Activity with GFP

    Type
    Blog Post
    Published
    Nov. 24, 2015, 3:30 p.m.
    ...GFP-labeled cells. Once Tang and Cepko found a description of GFP-binding nanobodies, the project really...stable inside cells. Nanobodies binding GFP were designed in 2009. Subsequent work showed that nanobodies...green-red Cre-lox systems. T-DDOGs can also be designed with other DNA-binding domains, including the ...
  11. The Future of Research Symposium Boston 2015

    Type
    Blog Post
    Published
    Oct. 20, 2015, 2:30 p.m.
    ...growing dialogue on the state of a system that, despite all of its successes, has many deep-rooted flaws...all bad, however - there are some signs that the tides may be turning. In 2013, the NIH announced its first...in Scientific Training (BEST) awards, which are designed to support new approaches that address the need...
  12. CRISPR 101: Targeting Non-Coding RNAs with CRISPR/Cas9

    Type
    Blog Post
    Published
    Nov. 14, 2024, 2:15 p.m.
    ...non-coding RNAs (lncRNA). lncRNAs are over 200 nucleotides in length and lack an open reading frame, so ...transcription machinery of a target gene or DNA that codes for ncRNA. CRISPRa, on the other hand, recruits ...which targets RNA instead of DNA and selectively degrades RNA molecules. This system is often used to knock...
  13. Viral Vectors 101: Calcium Sensors

    Type
    Blog Post
    Published
    Aug. 10, 2023, 1 p.m.
    ... There are several calcium reporters specially designed for the aims and requirements of in vivo studies...populations of interest. Many of the calcium sensors described are also already packaged into viral vectors and... L, Campbell RE. Structure-and mechanism-guided design of single fluorescent protein-based biosensors....
  14. Plasmids 101: In-house NGS Plasmid Quality Control Now at Addgene

    Type
    Blog Post
    Published
    April 6, 2021, 12:30 p.m.
    ...throughout the library preparation process and includes Picogreen quantification of various intermediate...sequences for Illumina sequencing as well as unique barcodes per sample so we can assign sequencing reads to... use a modified version of the Python program described by Joung et al. 2017, which we hope to make available...
  15. Tips for Technical Support Calls

    Type
    Blog Post
    Published
    Sept. 20, 2016, 2:39 p.m.
    ...plasmids and pooled libraries were originally described in a peer-reviewed scientific publication. We ...scientists answering their technical support questions (besides Addgene, I know both Abcam and NEB have Ph.D.s ...believe that scientists who contact customer service deserve prompt, courteous responses. No one is likely to...
  16. 5 Tips for Troubleshooting Viral Transductions

    Type
    Blog Post
    Published
    Aug. 11, 2016, 2:23 p.m.
    ... try amplifying the viral vector with bacteria designed to minimize rearrangements such as NEB Stable ...production of virus. Alternatively, if the virus encodes a fluorescent protein, the packaging cells could...working with, there’s a lot that goes into virus design, production, and transduction. Once you’ve harvested...
  17. The AAVantages of AAV in CRISPR Screens

    Type
    Blog Post
    Published
    Feb. 4, 2025, 2:15 p.m.
    ... This vastly increases the possibilities when designing screens. Each serotype has its own tropism, or...experiment. Additional considerations One of the downsides to using AAV is the limited packaging capacity...Adames, A. C., Saur, D., & Rad, R. (2022). Tutorial: design and execution of CRISPR in vivo screens. Nature...
  18. Antibodies 101: Conventional vs Spectral Flow Cytometry

    Type
    Blog Post
    Published
    Aug. 3, 2023, 1:15 p.m.
    ...positive and negative populations, Careful panel design In both conventional and spectral flow cytometry...indistinguishable. This tool is of particular value when designing a panel.     Figure 3: Similarity index...if markers are co-expressed in your cells when designing your panel. If you have two highly overlapping...
  19. Transgenic Organisms, Cas9 Gene Drives, and Appropriate Safeguards

    Type
    Blog Post
    Published
    May 22, 2015, 4:58 p.m.
    ... also the easiest: don't use a DNA vector that encodes both Cas9 and sgRNA. What if I want to work with...one mistake can be enough. Reversal drives are designed to overwrite a previous gene drive and thereby... on popular support, which in turn depends on widespread trust in scientists to develop new technologies...
  20. Tips for Using BLAST to Verify Plasmids

    Type
    Blog Post
    Published
    May 29, 2014, 1:29 p.m.
    ...terrific getting-started guide for BLAST, which includes a simple explanation of the different BLAST programs...matrix BLOSUM62, but you may want to check the description of the other matrices to see if another would...alternatives Depending on your sequencing result and desired analysis, BLAST may not always be your optimal ...
  21. Great Results Start with Great Standard Curves

    Type
    Blog Post
    Published
    Aug. 15, 2024, 1:15 p.m.
    ... the data points generated by replicate values provides useful information about the accuracy of the curve...If the unknown sample’s measurement is too low, redesign the standard curve dilution series with lower ...often recommend using advanced graphing software designed to plot complex trendlines. If you don’t have ...
  22. Plasmids 101: Choosing an Antibiotic Resistance Gene

    Type
    Blog Post
    Published
    Oct. 10, 2023, 1 p.m.
    ...The NPTII gene confers resistance to several aminoglycosides, including G418 which is commonly used for ...DNA and generating DNA breaks. The Sh ble gene provides zeocin resistance by expressing a protein that...experiments in which off-target mutations are undesirable. Pros: Works across many species/systems. Cons...
  23. Getting to Know Expansion Microscopy

    Type
    Blog Post
    Published
    June 20, 2023, 1:15 p.m.
    ...Microscopy. What is Expansion Microscopy?  ExM provides a straightforward answer to the space problem....improve label density (Mikhaylova, et al. 2015).  Despite these limitations, ExM is a valuable tool, especially...Bournonville L, et al (2021) Expansion microscopy provides new insights into the cytoskeleton of malaria ...
  24. Course-Based Undergraduate Research Experiences (CUREs)

    Type
    Blog Post
    Published
    Feb. 9, 2023, 2:15 p.m.
    ...semester one and then proceed to use those skills to design and carry out their own novel experiments in semester...resources, offers mentoring for instructors, and provides opportunities for students to exchange ideas and...results in student learning gains and positive STEM attitudes in CUREs. CBE Life Sciences Education. 21(4):ar74...
  25. Plasmids 101: Secondary Nanobody Toolbox

    Type
    Blog Post
    Published
    Feb. 27, 2018, 2:04 p.m.
    ...their production requires animal sacrifice and precludes genetic engineering of a tag or fusion with a ... with secondary nanobodies conjugated with the desired fluorophores. In figure 4B below, triple colocalization...review. If you just want to use the nanobodies described in Pleiner et al, the key steps for generating...
  26. SciComm: Taking Science to Elementary and Middle Schools

    Type
    Blog Post
    Published
    July 9, 2019, 12:52 p.m.
    ... can teach  5-10 year olds in a single evening. Grades K-5 cover a broad range of attention spans, skill...CRISPR work? This section was essentially background slides getting everyone on the same page in terms of the... by running it by the teachers and sharing some slides on Twitter, where I was able to get some great ...
  27. MXS Chaining

    Type
    Blog Post
    Published
    Feb. 7, 2017, 3:30 p.m.
    ...Origin and purpose of MXS chaining MXS-chaining was designed to create plasmids for fluorescence imaging or... can be assembled. For example, because CpG dinucleotides are underrepresented in most vertebrate genomes...and MluI recognition sites, which contain CpG dinucleotides in their 6-mer sequences, are rarely found in...
  28. Plasmids 101: Protein tags

    Type
    Blog Post
    Published
    Dec. 11, 2014, 4:26 p.m.
    ... Protein tags are usually smallish peptides incorporated into a translated protein. As depicted in the...depending on their protein of interest. After several decades of trying to address these challenges, researchers...examples. The tables list more common tags than are described in the post, but have been categorized to help...
  29. Interview: Hodaka Fujii on enChIP, New CRISPR Tools, and More

    Type
    Blog Post
    Published
    Dec. 2, 2014, 7:23 p.m.
    ...worked extensively with enChIP systems. Can you describe this technology and its advantages? Fujii: In ...enChIP system using CRISPR technology. Can you describe this technology and some of its potential applications... any other technologies that you would like to describe?  Fujii: I believe that "Biology is Method", i.e...
  30. Fluorescent Proteins 101: Green Fluorescent Protein (GFP)

    Type
    Blog Post
    Published
    May 15, 2014, 3:33 p.m.
    ...biochemical properties. In 1995, Roger Y. Tsien described an S65T point mutation that increased the fluorescence... in the wildtype protein and facilitating its widespread use in research. Many other mutations have since...array of GFP-based fluorescent biosensors has been designed to detect a variety of intracellular conditions...
  31. Hot Plasmids: Fall 2024

    Type
    Blog Post
    Published
    Nov. 21, 2024, 1:30 p.m.
    ...promising tool for future structure-guided drug design and studies of protein ubiquitination and degradation...CRBNmidi plasmid here!   Kroupova, A. et al. (2024). Design of a Cereblon construct for crystallographic and...specifically for C. elegans (Cao et al., 2024). The team designed coding sequences for mScarlet3 and mScarlet-I3...
  32. Antibodies 101: Reading a Flow Plot

    Type
    Blog Post
    Published
    Feb. 6, 2024, 3:13 p.m.
    ...series of markers are set up sequentially, from broadest to most specific marker, and are represented as...are, try drawing a quadrant over the plot that divides it into four, using the location of the cell populations...Gating and plot orders  As the gates progress from broadest markers to most specific, the first step is to...
  33. Viral Vectors 101: Preparing Pooled Libraries

    Type
    Blog Post
    Published
    July 13, 2023, 1:15 p.m.
    ... If not, our protocol on Lentivirus Production provides a general approach for producing lentivirus in...excellent protocol paper by the Feng Zhang lab describing construction, lentiviral production, transduction...the Broad Institute- A variety of protocols and guides regarding pooled libraries, from cloning a pooled...
  34. New Acoustic Reporter Genes: Ultrasound Imaging of Gene Expression

    Type
    Blog Post
    Published
    Jan. 24, 2023, 2:15 p.m.
    ...to distinguish from background tissue unless destructive ultrasound imaging was used. We set out to develop...acoustic properties of these gas vesicles made non-destructive specific imaging in tissue difficult. The first-generation... allowed the GVs to be flexible and produce nondestructive nonlinear ultrasound contrast. It turned out...
  35. Antibodies 101: Immunoprecipitation

    Type
    Blog Post
    Published
    Dec. 7, 2021, 2:15 p.m.
    ...most situations.  A slightly different method is desirable if the antibody is expected to bind weakly to ...vary in shape and structure. Their porous surface provides a large area for binding, but antibodies conjugated... slightly higher, than those of agarose beads, despite the size difference. Magnetic beads are particularly...
  36. CRISPR-based Genome Editing Systems For Editing in E. coli

    Type
    Blog Post
    Published
    April 13, 2021, 1:15 p.m.
    ...CRISPR-associated transposases” or MUCICAT. Here, we’ll describe each of these CRISPR systems. The original pCas...by sacB counterselection.  The MUCICAT toolkit includes versions of plasmids with different induction ...mechanisms behind their distinct phenotypes and to design a new generation of engineered cells for green ...
  37. To Codon Optimize or Not: That is the Question

    Type
    Blog Post
    Published
    Nov. 12, 2020, 2:15 p.m.
    ...Usage Tabulated from GenBank database (CUTG), that provides an electronic dataset for codon-usage of 257,468...(A) The codon wheel depicts the 64 codons that encodes the 20 amino acids and three stop codons. (B) Example...Codon Optimization  ATUM DNA2.0  IDT Synthetic gene design made easy GenScript- GenSmart Codon Optimization...
  38. Important Considerations in Optogenetics Behavioral Experiments

    Type
    Blog Post
    Published
    Oct. 1, 2015, 2:30 p.m.
    ...other words, your optogenetic experiment should be designed around a behavioral test in which your circuit...of mouse transgenics. Everything that has been described is intended for the mouse; however, all the steps....Diester, Ilka, et al. "An optogenetic toolbox designed for primates." Nature neuroscience 14.3 (2011)...
  39. Adeno-associated Viruses (AAVs) for Genome Editing

    Type
    Blog Post
    Published
    March 27, 2018, 1:32 p.m.
    ...human cells (Kim et al, 2016). The Waldman lab has designed their AAV tagging vectors (pAAV-SEPT-Acceptor ...vectors for your specific gene, the lab recommends designing homology arms with the modification of interest...combining the AAV and CRISPR-based approaches is described in several recent reviews (Howes and Schofield...
Showing: 441 - 480 of 801 results