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We narrowed to 25 results for: loxP

Showing: 1 - 20 of 25 results

  1. Plasmids 101: Cre-lox

    Type
    Blog Post
    Published
    Jan. 13, 2015, 3:47 p.m.
    ...the core sequence gives the loxP site directionality, and the canonical loxP sequence is ATAACTTCGTATA-... a single loxP site are recognized and bound by a Cre protein, forming a dimer. The two loxP sites then... location and orientation of the loxP sites: Inversion: If the loxP sites are on the same DNA strand ... putting the loxP sites on either side of a gene (called “floxing”, for “flanked by loxP”), will permit...potential limitation of using loxP sites is the inability to tightly control which loxP sites recombine if more... the P1 bacteriophage: the Cre recombinase and a loxP recognition site. The P1 bacteriophage uses these... intra- and inter-molecular recombination at the loxP recognition sites. A key advantage of the system...

  2. Plasmids 101: FLEx Vectors

    Type
    Blog Post
    Published
    April 28, 2016, 2:30 p.m.
    ...lox511 sites, not with loxP sites. Alternatively, you could use a pair of loxP sites and a pair of FRT...between the identical loxP or lox511 sites (Figure 1, bottom). Since only one loxP and lox511 site will...with one loxP site and one lox511 site in the same orientation, and placing the additional loxP and lox511... our Plasmids 101 series, we learned how the Cre-loxP recombination system can be used to induce site-...events, and that the orientation of the flanking loxP sites directs the Cre recombinase to invert, translocate...fragment. The availability of both wild-type and mutant loxP sites has allowed scientists to leverage this system...specific recombination events: Cre recombinase binds loxP sites, while FLP binds FRT sites. When a DNA sequence...

  3. Plasmids 101: Knockout/Knock-In Plasmids

    Type
    Blog Post
    Published
    Dec. 1, 2016, 3:30 p.m.
    ...resistance gene through the insertion of flanking LoxP sequences, you can remove the gene through the addition...design your targeting vector such that a set of three LoxP sites flank the resistance gene and the targeted... been replaced with the same sequence flanked by LoxP sites while the resistance cassette has been placed... marker using Cre recombinase. Since there are 3 loxP sites, recombination can occur in multiple ways....floxed, as seen in line 4 of Figure 4. Since the loxP sites are located in intronic regions, this gene...using a repair template. These templates can include loxP sites to create conditional floxed alleles. Although...

  4. Advanced Uses of Cre-lox and Flp-FRT - A Neuroscientist’s View

    Type
    Blog Post
    Published
    Oct. 19, 2017, 1:54 p.m.
    ...recombination between those sites. FRT sites and loxP sites differ at the nucleotide level but share an...translocation of DNA in a similar fashion as between loxP sites (For details see Cre-lox blog post). Optimizing...FLP-FRT systems in your experiments. Mutated FRT and loxP sites in Flex Vectors – inversion only once All ...Whereas the excision of a piece of DNA flanked by loxP/FRT sites is favored over its reintroduction, inversion... sequence and should therefore be prevented. The loxP and FRT target sites have been engineered to avoid...Cre-ERT2 recombinase, leading to recombination of the loxP sites and thereby to the gene knockout. In this ...

  5. A Practical Guide to Optimizing AAV DIO and FLEx Vector Expression

    Type
    Blog Post
    Published
    Nov. 2, 2021, 1:15 p.m.
    ...sandwiched between 2 loxp sites and is excised by Cre (Figure 1). This results in one loxp site and one lox2272...unused (loxp) sites will be flanked by two lox sites now in the same orientation. Next, the loxp site is..., but they are comprised of different sequences (loxp and lox2272) and can not recombine with each other...system it binds one pair of lox sites, let's say the loxp pair, and flips the transgene into the correct orientation...lox2272 site on either end of the transgene. Since loxp and lox2272 can not recombine, this ensures that...

  6. Evolution of Brainbow: Using Cre-lox for Multicolor Labeling of Neurons

    Type
    Blog Post
    Published
    April 24, 2015, 2:39 p.m.
    ...these deletions are defined using 2 loxP variants (only identical loxP sites can mediate recombination.)...recombination events, and the synthesis of alternative loxP sites to specify distinct patterns of recombination...exclusive, as either deletion removes one of the other loxP site variants, preventing further recombination....proteins, with recombination events specified by three loxP variants, but the principles remain the same. The...

  7. Easi-CRISPR: Generating Knock-In and Conditional Mouse Models

    Type
    Blog Post
    Published
    April 5, 2018, 12:42 p.m.
    ...target 2 loxP sites to intronic regions 0.5 - 0.8 kb apart. In the example below, we’ll add loxP sites for... and two repair templates in order to insert two loxP sites. Since two double-strand breaks are made, ...variety of other undesired outcomes, including one loxP site insertion and one NHEJ-repaired indel, often...homology on each side. For optimal repair, place the loxP sites precisely at the cut site for each guide. ...

  8. Plasmids 101: The protein expression toolbox

    Type
    Blog Post
    Published
    Feb. 16, 2023, 7:05 p.m.
    ...inducible yet permanent gene excision. Essentially, LoxP sites are knocked in flanking a gene of interest...time-tested system but does require knock-in of the LoxP sites, which is more difficult than a simple knock...out plasmids? Check out our Cre vector and Murine LoxP vector.   Turn it off for a little while Transient...

  9. Mouse Modeling, Part 2: Breeding and Crossing Mice

    Type
    Blog Post
    Published
    Aug. 6, 2019, 12:55 p.m.
    ...genetic recombination in mice expressing both Cre and LoxP occurs. But how are these mice made to begin with...want to genotype your mice for expression of Cre, loxP, and your gene of interest. To ensure that the effects...control should be littermates that express Cre but not loxP. With this two-part guide to mouse modeling now ...

  10. Mouse Modeling, Part 1: Genetically Engineered Mice

    Type
    Blog Post
    Published
    July 11, 2019, 1:26 p.m.
    ...recombination of DNA sequences located between two loxP sites. The loxP sites are present at both ends of a gene...recombination. To generate a conditional knockout mouse, loxP sites are inserted directly into the genome to flank...

  11. Cre-ating New Methods for Site-specific Recombination in Drosophila

    Type
    Blog Post
    Published
    May 12, 2015, 1:32 p.m.
    ...Cre may induce recombination at pseudo- or cryptic loxP sites (estimated to occur at a frequency of 1.2 ...458-65. doi:10.1007/s004270100167. PubMed. Cryptic loxP sites in mammalian genomes: genome-wide distribution...

  12. Even more elegant: Single injection CRISPR/Cas9 in C. elegans

    Type
    Blog Post
    Published
    July 7, 2015, 3:36 p.m.
    ...easy to remove after injection, they added flanking loxP sites and a heat-shock inducible Cre to generate...schematic below.) After self-excision, the resulting loxP scar is located in this synthetic intron, and only...

  13. PiggyBac-ing Through the Genome Editing Field

    Type
    Blog Post
    Published
    May 31, 2016, 3:30 p.m.
    ...technology (Cre/loxP) to remove the donor cassette. While this method can be effective, a loxP site is left...Grégoire and M. Kmita, “Recombination between inverted loxP sites is cytotoxic for proliferating cells and provides...

  17. Another Pathway into Cells: iTOP

    Type
    Blog Post
    Published
    June 23, 2015, 8:37 p.m.
    ...series of primary cell types using Cre and various loxP reporters. In both mouse and human embryonic stem...

  18. Delivery Methods for Generating iPSCs

    Type
    Blog Post
    Published
    April 17, 2018, 1:37 p.m.
    ...transgenes that are flanked by loxP sites. While there is only a small loxP scar behind at the site of excision...
Showing: 1 - 20 of 25 results