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Showing: 41 - 60 of 740 results
  1. Minigenomes - a Safe Way to Study Dangerous Viruses Like the Ebola Virus

    Type
    Blog Post
    Published
    March 17, 2016, 2:30 p.m.
    ...these components are necessary to efficiently reconstitute a functional viral polymerase complex and utilize...proteins are provided in trans (see Other Important Components of EBOV Minigenome System). However, minigenomes...RNA viruses (reviewed in 2, 3). Other important components of the Zaire ebola virus minigenome system Similar...with the viral polymerase, which is formed by a complex of two proteins: the large (L) catalytic protein...-stranded RNA minigenome. The viral polymerase complex then recognizes the encapsidated minigenome as ... genes in this plasmid would be more difficult compared to if each gene were encoded in separate (and ...particular observation can be easily studied as each component can be examined independently. In addition, experiments...
  2. Transferable Skills Guide: Conflict Resolution

    Type
    Blog Post
    Published
    Jan. 4, 2022, 2:15 p.m.
    ...issues in the past, or how completely different teams are tackling comparable conflicts. Is this level ...cooperation: avoiding, competing, accommodating, collaborating, and compromising. Though there may be a...Skills series, this post is not meant to be a comprehensive guide to Conflict Resolution. There are countless...conflict is actually critical in the business world. Companies and organizations that avoid all conflict can ...with whom you strongly disagree, is a critical component of conflict resolution. Having empathy does not...course many other types of conflict resolution. In compromise, you are trying to come to a consensus that all...parties will accept. If you are able to broker a compromise well, you can help everyone walk away from a ...
  3. Split Fluorescent Proteins for Studying Protein-Protein Interactions

    Type
    Blog Post
    Published
    May 3, 2022, 1:15 p.m.
    ... homolog of the yeast TREX-2 mRNA export complex: components and anchoring nucleoporin. Lu et al. Plant...generally known as Bimolecular Fluorescence Complementation (BiFC). It can provide a qualitative or quantitative... or even single-particle tracking of the bound complex. There are so many FPs available, with many ways... In several cases an FP(1-10) fragment may be compatible with multiple FP(11) fragments, even from a different...because they are used with an already-available complementary fragment. Next, let's look at a round-up of...protein fragments for bimolecular fluorescence complementation analysis under physiological conditions. Shyu...
  4. Plasmids 101: Modular Cloning

    Type
    Blog Post
    Published
    March 12, 2024, 1:15 p.m.
    ...so simple, and engineering complex cellular behaviors requires making complex manipulations to cells. For...assembly. Simply put, it assembles individual DNA components into larger units or circuits with functional...Transcription units (TUs), which are functional units composed of multiple parts transcribed together. They can...and end with a terminator. A simple TU could be comprised of just three parts: promoter, gene, and terminator...MoClo. By a similar principle, TUs can be further complexed into multi-TU constructs, known as multigene constructs...promoters, UTRs, genes, tags, etc.) into MoClo-compatible vectors. Level 1: Assembly of multiple Level ...interact with other proteins and with DNA, and these complexes regulate the transcription of specific genes. ...
  5. Don’t Wait To Launch Your Health Science Startup

    Type
    Blog Post
    Published
    Aug. 25, 2015, 2:30 p.m.
    ...at major companies.  The majority of these meetings acted as a platform for significant company advancement...their 20’s who’ve built multibillion dollar tech companies using only laptops and some server space. But... find an extra layer of difficulty launching a company in the health sciences without those critical three... into commercial products and next generation companies.  We launched in the early spring of 2015 and ...Before even beginning the process of launching a company, you need to determine whether or not your idea...your idea, you will rarely succeed in launching a company without partners.  You need a dedicated team that...funding bodies shy away from one man teams.  The composition of the management team is more important than...
  6. Plasmids 101: Using Transposons in the Lab

    Type
    Blog Post
    Published
    July 6, 2021, 1:28 p.m.
    ...QCascade complex surveys the genome and binds its target DNA sequence. The transposase complex binds the...around in the lab.  Let’s take a look at the key components of transposons, how they are classified, and ... in both prokaryotic and eukaryotic genomes.  Components of a transposon system Transposon: The transposon...is left behind. When the transposon-transposase complex finds its target site, it integrates, which produces...TEs You can think of autonomous transposons as “complete transposons” since they encode the protein they...transposase, SB100X, is ~100-fold more efficient compared to first generation SB transposase (Mátés et al...
  7. Hassle-free 96-well Format Epitope Tagging Using Cas9 Ribonucleoprotein

    Type
    Blog Post
    Published
    June 28, 2018, 3:01 p.m.
    ...homology arms (60-70 bp) is added to the complex. This complete transfection mix, i.e. csRNP plus ssODN... Cas9 RNP complexed with 2-part cr:tracrRNA tags genes more effectively than Cas9 complexed with sgRNA...immunoprecipitated - along with its associated protein complexes - from the cell-lysate using antibodies against...against the target protein. The captured protein complexes are then analysed by mass spectrometry to identify...recombinant Cas9 protein to form the ribonucleoprotein complex (csRNP, Figure 1). We use in-house purified Cas9... cost-effective and highly active. After csRNP complex formation, a single-stranded donor DNA (ssODN) ...experiment depends largely on how efficiently these components are delivered into cells; for each cell type,...
  8. Antibodies 101: ELISA (Enzyme-linked Immunosorbent Assay)

    Type
    Blog Post
    Published
    Aug. 24, 2021, 1:15 p.m.
    ... These are sandwich, competitive, direct, and indirect. Sandwich and competitive ELISA use antibodies ...et al., 2019.   Competitive ELISA Similar to a sandwich ELISA, the competitive ELISA is also used ... will bind to the competing antigen in the wells while the protein-antigen complexes will be washed away... be adapted to a competitive format. Figure 2: Overview of using Competitive ELISA to quantitatively...epitopes on the target protein, so they do not compete with each other. This antibody is also conjugated...protein of interest in the original sample. The competitive ELISA is best used for detecting antigens that...sandwich ELISA. While the most common type of competitive ELISA is a modification of the sandwich ELISA...
  9. Nanoblades: Tiny CRISPR Ninjas for Genome Editing Difficult Cells

    Type
    Blog Post
    Published
    Sept. 26, 2019, 12:50 p.m.
    ...the key components of Nanoblades, how their editing efficiency and off-target effects compare to existing... primary cells. Comparing Nanoblades to Existing CRISPR Delivery Methods When compared head-to-head with...for HDR editing and mouse-model generation. Key components of Nanoblades Nanoblades are a Cas9 RNP delivery...are produced by transfecting the following four components into 293T cells. MLV GAG-POL polyprotein Nanoblades...Nanoblades also had lower off-target effects when compared to DNA transfection of gRNA and Cas9 expression...of RNPs generally having lower off-target edits compared to DNA transfection.  Homology directed repair...helps form DNA and retroviral-particle or VLPs complexes. The team found that "all-in-one" Nanoblades facilitated...
  10. A Needle in a Base-Stack: Cas9 Structural Biology

    Type
    Blog Post
    Published
    June 4, 2024, 1:15 p.m.
    ...structurally resemble any other known proteins; they are completely unique to the CRISPR system (Nishimasu et al....conformation.   Fun Fact! Even though the Cas9:RNA complex is well described in the closed conformation, recent...electron microscopy studies have also found Cas9:RNA complexes in the open conformation (Cofsky et al., 2022)...guide RNA, prearranged for base pairing with a complementary DNA strand. These 10 nucleotides are the “seed...pyogenes Cas9 in the apo state (PDB ID 4CMP, top) compared to the guide RNA-bound state (PDB ID 4ZT0, bottom...the PAM sequence and doesn’t mind if the PAM complementary strand is mismatched.   Figure 5: S. ... found a PAM site, Cas9 needs to check for complementarity with its guide RNA. But how to test DNA bases...
  11. Plasmids 101: Degron Tags

    Type
    Blog Post
    Published
    March 14, 2024, 1:15 p.m.
    ...endogenously expressed SCF complex members, an E3 ubiquitin ligase complex. Finally, when auxin is added...can offer over other protein control methods and compare the commonly available types of degron tags. What...removed. The degradation and reversal are rapid compared to other systems because the system modulates ...other systems reviewed here. The only required components are 1) a SMASh-tagged protein and 2) asunaprevir...fusion protein with the endogenous CRBN E3 ligase complex which will polyubiquitinate the fusion protein....target protein-of-interest and the CRBN E3 ligase complex leading to ubiquitination and proteasomal degradation...reviewed here. The AID system relies on three components. First, the protein of interest must be AID-tagged...
  12. Hot Plasmids and Viral Preps - May 2021

    Type
    Blog Post
    Published
    May 18, 2021, 1:15 p.m.
    ...a single enzyme. Compared with previous research, which required protein compartments to co-localize multiple... antibodies for aminoacyl tRNA synthetases Nanocompartments for yeast bioproduction pathways The CRISPR...Research Center developed a pooled plasmid library encompassing all possible amino acid mutations of the receptor...many aaRSs exist within a multi-tRNA synthetase complex, the team investigated whether the generated antibodies...antibodies were able to immunoprecipitate the entire complex in three different cell lines. The Gräslund lab...Clouse Claudia Vickers’ lab has created a novel nanocompartment for transporting proteins in yeast by using... anchors to VP1, which self-assembles into a compartment encapsulating the protein of interest (Figure...
  13. CRISPR 101: Ribonucleoprotein (RNP) Delivery

    Type
    Blog Post
    Published
    Sept. 6, 2018, 12:02 p.m.
    ...experiment requires delivery of, at minimum, two components: the Cas9 protein and a guide RNA (gRNA) targeting...valuable to scientists, there are some potential complications that must be considered when using this method...alternative approach, which avoids many of these complications, is to directly deliver a ribonucleoprotein ...ribonucleoprotein (RNP), consisting of the Cas9 protein in complex with a targeting gRNA, to your cells of interest. Cas9...cleaving genomic targets with similar efficiency as compared to plasmid-based expression of Cas9/gRNA and can...CRISPR experiment is the generation of the RNP complex.  While one option is to purchase the Cas9 protein... by commercial vendors such as IDT. These two components are then incubated together to form the RNP. ...
  14. Antibodies 101: Flow Cytometry Controls

    Type
    Blog Post
    Published
    June 6, 2024, 1:50 p.m.
    .... They are made up of compensation beads and a conjugated antibody. Compensation beads are a mixture between... single color control prior to compensation (B) and after compensation (C) with APC-Cy7.   FMOs FMO...your experiment, and they are non-specific. The compensation beads can bind to any primary antibody you add...up your voltages and can also be helpful for compensation. You should have a single color control for ...They may also be used as a starting point for compensation (Fig. 1B-C). However, it’s important to note...and not experimental samples, the voltages and compensation you set from your single color controls may ... the reference plots provided by the antibody companies or check the literature. Pro tip! Early gates,...
  15. CRISPR 101: Engineering the Plant Genome Using CRISPR/Cas9

    Type
    Blog Post
    Published
    Oct. 11, 2016, 2:30 p.m.
    ...Delivering CRISPR components to plant cells Once you have selected the correct CRISPR components for your application...deliver these components to your target cells. Remember, efficient delivery of CRISPR components is essential...organisms, some plant-specific changes to CRISPR components are necessary to enable genome editing in plant... academic researchers through Addgene. CRISPR components for plant genome engineering CRISPR can be used...genome of plant cells. The structure of the gRNA (composed of a ~20 nucleotide targeting sequence and ~75...line will result in a failed experiment. CRISPR components can be expressed stably or transiently depending...delivery method and cell type in question. CRISPR components can be delivered and expressed transiently using...
  16. Split-BioID: An Improved Method for Studying Protein-Protein Interactions

    Type
    Blog Post
    Published
    May 1, 2018, 1:57 p.m.
    ...approach to monitor the composition of spatiotemporally defined protein complexes. Nature communications...can be part of multiple dynamic and overlapping complexes that have distinct functions. Many existing methods...proteins that interact with a particular protein  complex as opposed to an individual protein. The Bethune... when the bait is part of a particular protein complex. Not performed in a native cell context. For AP-MS...controllable version of the BioID protocol. The critical component for both BioID and Split-BioID is BirA*, a promiscuous...experiment is called a protein fragmentation complementation assay (PCA). In the Split-BioID method, each...another example of a protein fragmentation complementation assay that can be used to study binary protein...
  17. Multiplexed Capture of Promoter-enhancer 3D Chromatin Structures Using CRISPR

    Type
    Blog Post
    Published
    July 2, 2020, 12:40 p.m.
    ... in proximity by the looping of chromatin, the complex of DNA and proteins that forms chromosomes. These...of a stable cell line that co-expresses three components: dCas9 with an added biotin acceptor site BirA...genomic location of interest  When these three components are co-expressed, the gRNA targets the dCas9 ... of the CAPTURE method. After protein and DNA complexes are cross-linked, DNA is digested into smaller.... This is cumbersome and also makes it hard to compare results across multiple targets because different...with primary cells or rare cell populations. Key components of the CAPTURE 2.0 system To improve upon the... Using this tag reduces the number of CAPTURE components that need to be delivered to cells from three...
  18. AAV Titers: Where do they come from and what do they mean?

    Type
    Blog Post
    Published
    Nov. 15, 2017, 3 p.m.
    ...point is there are many ways to quantify the composition of a viral vector solution, and generally these...only 20% of recombinant AAV2 particles were full, compared to 50% of wild-type AAV2 stocks (Grimm et al.,...understand what these values mean and how they can be compared.   Figure 2: Label that comes on Addgene...affected by many experimental factors. To list some complicating factors for quantifying AAV: qPCR efficiency...the AAV genome, caused by repeats and self-complementarity of the AAV genome and the ITRs. qPCR efficiency...individual sample, this will reduce convenience and comparability because each sample with be quantified with ...linear region of the assay. This may be due to competition for binding sites between the primers and the...
  19. Antibodies 101: Immunoprecipitation

    Type
    Blog Post
    Published
    Dec. 7, 2021, 2:15 p.m.
    ...immunoglobulins, to isolate a specific protein out of a complex mix. Using this technique, users can look for the...the antibody or antibody-target protein immune complexes, wash away unbound protein, elute and measure ...Protein extracts from cells or tissues contain a complex mix of proteins seen as green squares, purple circles...protein mix and antibody-target protein immune complexes are allowed to form. Following incubation, beads...beads are used to immobilize the antibody-protein complexes, and as in the first method, unbound proteins ... need to choose the protein type that is most compatible with the host species and isotype of their primary...developed, which can be used for most antibodies compatible with either Protein A or G.  While commonly used...
  20. Plasmids 101: Origin of Replication

    Type
    Blog Post
    Published
    Nov. 11, 2020, 2:23 p.m.
    ... plasmids with the same ori are incompatible because they will compete for the same machinery, creating...their copy number, ori, and incompatibility groups. Note the A -C compatibility grouping is an arbitrary ...origin of replication/replicon. The replicon is comprised of the origin of replication (ori) and all of ...origin of replication wisely and avoid plasmid incompatibility In other words, the best choice of ori depends... or not you need to consider your plasmid's compatibility with one or more other plasmids. Generally speaking...plasmids for an experiment, make sure they have "compatible" ori's. See the table below for more details....details.   Common Vectors Copy Number+ ori Incompatibility Group Control pUC ~500-700 pMB1 (derivative...
Showing: 41 - 60 of 740 results