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We narrowed to 935 results for: Ina

Showing: 181 - 200 of 935 results
  1. Protocol - How to Design Primers

    Type
    Protocol
    ... primers) or too short. Short primers produce inaccurate, nonspecific DNA amplification product, and long...
  2. Immunocytochemistry

    Type
    Protocol
    ...Blog Posts Antibody Guide Western Blot Protocol Recombinant Antibody Purification Protocol Introduction Immunocytochemistry...
  3. Advanced Uses of Cre-lox and Flp-FRT - A Neuroscientist’s View

    Type
    Blog Post
    ...) control of DNA recombination and gene expression can be advanced by the coordinated use of fellow SSR...system. The FLP recombinase recognizes FRT sites and initiates site directed gene recombination between those...channel under the control of Cre recombinase are used in combination with mouse lines that express Cre...regulated recombinase - keeping Cre out until needed But what can be done when the recombination should ...concentrations in combination with low concentrations of vectors expressing the required recombinase. The high...under the control of Flp recombinase together with inducible Cre recombinase (CreERT2), visualizes individual...Tamoxifen injection induces Cre-ERT2 recombinase, leading to recombination of the loxP sites and thereby to...
  4. 22 Hot Plasmid Technologies from 2014

    Type
    Blog Post
    ...components into a destination vector in a predefined order. Finally, the destination vectors are used ...positional groups. Eight final destination vectors, consisting of all four final RVD modules in each of ...promoter, N-terminal tag, coding sequence of the gene of interest, C-terminal tag, plant terminator, and plant...Gateway compatible destination vector for a maximum of 24 elements assembled into a final transgenesis construct...light-activated receptor tyrosine kinases Receptor tyrosine kinases (RTKs) are a large class of cell-surface...determined by competing recombination events at the genetic level. Upon Cre/loxP recombination, each transgene...:1852-61. A quicker method for protein inactivation Your protein of interest does x, but it also...
  5. A Practical Guide to Optimizing AAV DIO and FLEx Vector Expression

    Type
    Blog Post
    ...models that express recombinases like Cre or Flp in their cells of interest and recombinase-dependent AAV vectors...Causes of recombination and leaky expression While leaky expression and spontaneous recombination is a known...sets of homologous recombination sites, they hypothesized that spontaneous recombination between these sites...even begins. This spontaneous recombination persists even in recombinase deficient E. coli and under conditions...vectors are much more prone to recombination and can exhibit recombination levels as high as 1-3%. In light...the recombination rate The first step in optimizing DIO/FLEx vectors is to know the recombination rate...system is off-target or spurious expression of recombinase-dependent AAV vectors. In this article, we will...
  6. Plasmids 101: Knockout/Knock-In Plasmids

    Type
    Blog Post
    ...against random recombinants.   Design your targeting construct. For recombination to occur in a ... for recombination, the negative selection marker selects against improper, random recombination into ...random recombination may incorporate the negative selection marker into the genome. This final product...After recombination has occurred, you'll first remove the resistance marker using Cre recombinase. Since...are 3 loxP sites, recombination can occur in multiple ways. The desired recombination event will remove...strategies to investigate a gene's function is to inactivate, or "knockout", the gene by replacing it or disrupting...yeast, mice, or Drosophila through homologous recombination. The concept is simple: deliver a template with...
  7. AAV Vector Quality Control: Going the Extra Mile with NGS

    Type
    Blog Post
    ...44632, the contaminant we mixed into the original AAV sample at 5%. Detecting 5% contamination is a good... Our recombination software looks for and quantifies the presence of recombinants in recombinase-dependent...sequences. Recombinase-dependent sequences may be subject to recombinase-independent recombination during ...containing the suspected contaminating sequence. In most cases, the source of the contamination can be identified...prep we suspect is contaminated. For AAV-68544, the best match for the contaminant is Addgene plasmid ...This recombination produces a minor pre-recombined population that does not require the recombinase for...viral vectors and estimate that recombinase-independent recombination occurs in 0.1-0.6% of AAV particles...
  8. 27 Hot Plasmids from 2016

    Type
    Blog Post
    ...human kinases remains challenging. Small molecule kinase inhibitors usually target soluble kinase domains...thereby rapidly create desired allele combinations and combinatorial genomic libraries. MAGE has allowed...pORTMAGE) expresses the λ Red recombinase enzymes, as well as a dominant-negative mutator allele of the... HA tagged BioID2 for N-terminal fusions and Myc tagged BioID2 for C-terminal fusions. Kim, et al. Mol... pCAG-T7-TALEN(Sangamo)-Destination series, pCAG-Golden-Gate-Esp3I-Destination Takashi Yamamoto pcDNA-TAL-NC2...Human kinase domain constructs for automated bacterial expression The misregulation of human kinases has...recently compiled the Human Kinase Domain Constructs Kit, a library of human kinase domain constructs developed...
  9. Plasmids 101: Cre-lox

    Type
    Blog Post
    ... manipulation. Cre recombinase, originally named because it “causes recombination” (although later referred...cyclization recombinase”), is a 38 kDa protein responsible for intra- and inter-molecular recombination at the...alluded to above, the Cre recombinase catalyzes the site specific recombination event between two loxP sites...separate recombination events? One potential limitation of using loxP sites is the inability to tightly...specific recombination event in a single system. The Saccharomyces cerevisiae FLP-FRT recombination system... 1. Bacteriophage P1 site-specific recombination. I. Recombination between loxP sites. Sternberg, N. and.... 2. Site-specific DNA recombination in mammalian cells by the Cre recombinase of bacteriophage P1. Sauer...
  10. Viral Vectors 101: Systemic Capsids

    Type
    Blog Post
    ...deposited by the Gradinaru lab. For simplicity, in each section we’ll list the Gradinaru capsids first, ...be used to target endothelial cells in the retina and spinal cord (Krolak et al., 2022). Systemic capsids... X., Luo, Y., Einarsson, P. H., Greenbaum, A., Jang, M. J., Deverman, B. E., & Gradinaru, V. (2020). Multiplexed...promoters and enhancers, miRNA target sites, and recombination target sequences, denoted by triangles] facilitate.... In cases where it’s critical to minimize or eliminate off-target expression, it may be better to choose...capsids in our repository are deposited by the Gradinaru lab. You can visit our Caltech Systemic Capsids...
  11. 28 Hot Plasmid Technologies from 2015

    Type
    Blog Post
    ...protein is composed of an n-terminal DNA recognition domain and a mostly c-terminal nuclease domain. Feng Zhang's...Splitting wild-type Cas9 into n-terminal (Cas9(N)-2xNLS) and c-terminal (Cas9(C)-2xNLS) fragments facilitates...with different N- and C-terminal tags. Additionally, by using an adapted destination vector with a heterologous...bearing the "Bunch of Baby Spinach"aptamer, which is a brighter version of Spinach2, an RNA aptamer that fluoresces.... Bunch of Baby Spinach, or BoBS, consists of three tandem copies of the Baby Spinach core embedded in...with Broccoli Vegetable tags, including Spinach, Spinach2, and Broccoli, can benefit your RNA experiments... control of gene knockout or activation, the c-terminal cas9 fragment was fused with FK 506 binding protein...
  12. The Fluorescent Vegetables in Aptamer Soup

    Type
    Blog Post
    ... Other variants of Spinach include Baby Spinach, a miniaturized version of Spinach that retains similar... Hammond’s group created Spinach2 using site-directed mutagenesis of Spinach. In doing so, they identified...was consequently brighter than Spinach. The initial studies using Spinach2 showed its ability to track RNA...imaging. Bunch of baby spinach, or BoBS, contains tandem repeats of Baby Spinach. It was developed in a...twice as bright as Spinach2 when bound to DFHBI. It’s also smaller than any form of Spinach - only 49 nucleotides...Addgene’s collection. Green fluorescent aptamers Spinach and Broccoli and their derivatives are aptamers..., but not quantitative, studies. Additionally, Spinach, the first aptamer identified to bind DFHBI, is...
  13. Plasmids 101: Gateway Cloning

    Type
    Blog Post
    ...bacteria. In vivo, these recombination reactions are facilitated by the recombination of attachment sites ... in the donor vectors and the destination vectors prior to recombination, and it is exchanged with the...or by Restriction Cloning Destination vector attR sites for recombination; ccdB gene for negative selection...vector systems. With the appropriate entry and destination vectors, one can use Gateway to clone a gene ...vitro version of the integration and excision recombination reactions that take place when lambda phage ...attP) and the bacteria (attB). As a result of recombination between the attP and attB sites, the phage integrates...into the bacterial genome flanked by two new recombination sites (attL-left- and attR-right-, Figure 1)...
  14. Evolution of Brainbow: Using Cre-lox for Multicolor Labeling of Neurons

    Type
    Blog Post
    ... primer on how Cre-lox recombination works. Advances in Cre-lox recombination have included inducible...coupling of Cre-lox with FLP-FRT recombination to generate additional recombination events, and the synthesis...excision results in one of three recombinations, and subsequent recombinations cannot occur. While the Brainbow...Brainbow-1.0 mice.) The combinatorial effect of multiple, independent recombination events leads to a rainbow...systems remain valuable to biology. Cre-lox recombination, discovered in the 1980s, is one of the most... loxP sites to specify distinct patterns of recombination. In 2007, Joshua Sanes and Jeff Lichtman, both...M-CFP (membrane tethered cyan). Without Cre recombination, RFP is expressed. Cre can mediate one of two...
  15. Plasmids 101: Repressible Promoters

    Type
    Blog Post
    ...factor and promoter pairs referred to as binary systems. Binary systems are genetic tools that consist ...repressible element to this binary system (making this a repressible binary system). The GAL80 repressor...expression and largely defines the amount of recombinant protein that will be produced. Many commonly-...default ON to an OFF state, as well as repressible binary systems. In recent years, a number of more complex... previous post. In the past 30 years since the original Tet-Off system was described by Gossen and Bujard...inducible manner detailed in our previous post. While originally developed for use in mammalian cells, this system...consumption phase of yeast culture. Repressible Binary Systems GAL4/UAS In Drosophila or development studies...
  16. CRISPR 101: Cytosine and Adenine Base Editors

    Type
    Blog Post
    ...cytosine base editor by coupling a cytidine deaminase with the inactive dCas9 (Komor et al., 2016). These fusions...RNA adenine deaminases have been engineered and/or evolved to catalyze cytidine deamination instead of ...adenine deaminases. The team used directed evolution to create one from the RNA adenine deaminase TadA.   ...protein (catalytically dead or nickase) fused to a deaminase that makes the edit A gRNA targeting Cas to a ... and team wanted to force the cell to use the deaminated DNA strand as a template. To do so, they used...copying the base edit. Figure 2: Cytidine deamination takes place on the free strand of DNA and converts...created the Target-AID base editor using a cytidine deaminase from sea lamprey fused to Cas9 nickase (Nishida...
  17. Plasmids 101: FLEx Vectors

    Type
    Blog Post
    ...how the Cre-loxP recombination system can be used to induce site-specific recombination events, and that...sites to induce site specific recombination events: Cre recombinase binds loxP sites, while FLP binds ...presence of Cre recombinase.   Once the SSR of choice is introduced, recombination can proceed either...any additional recombination events are impossible even in the presence of Cre recombinase. This plasmid...BL. 2012. Novel recombinant adeno-associated viruses for Cre activated and inactivated transgene expression...orientation of the flanking loxP sites directs the Cre recombinase to invert, translocate, or excise a DNA fragment...such strategy--the FLEx switch--which utilizes recombination elements to turn off expression of one gene,...
  18. What’s in Your Tube?: A Quick Guide to Measuring DNA by Spectrophotometry

    Type
    Blog Post
    ...break down how different contaminants impact these ratios.  Protein contaminants Whether you are purifying...indicator of protein contamination, but a number of other potential contaminants alter this ratio as well...phenol in your sample.  RNA contaminants DNA samples can also be contaminated with RNA (and vice-versa)....Characteristic absorption spectra for pure DNA and likely contaminants found in DNA samples. The blue lines in B-D ...B-D represent the spectra for the specified contaminant, while the grey lines in B-D represent the pure ...pure DNA spectra for comparison. Each of these contaminants will have a slightly different impact on the ...alter the overall 260 nm reading, distorting the final concentration calculation and potentially impacting...
Showing: 181 - 200 of 935 results