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  1. CRISPR 101: Ribonucleoprotein (RNP) Delivery

    Type
    Blog Post
    ...site of interest. This is commonly performed by transfecting cells with a plasmid, such as PX459, which encodes...this method:     Cells must be amenable to transfection or viral transduction     Appropriate promoters... often be used in cells that are difficult to transfect, such as primary cells. Using RNPs can also alleviate... are detectable at high levels shortly after transfection, and are quickly cleared from the cell via protein...template. Other techniques, such as lipid-mediated transfection (B in the figure above), are in the early stages... this are Polyethylene Glycol (PEG) mediated transfection of protoplasts and biolistic bombardment of ...CRISPR studies in cells that are difficult to transfect or transduce. While using Cas9-gRNA RNPs may require...
  2. Plasmids 101: Transformation, Transduction, Bacterial Conjugation, and Transfection

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    Blog Post
    ...   Transfection Unlike the last three methods which can be used in prokaryotes, transfection is only...transformation, transduction, conjugation, and transfection. Transformation, transduction, and conjugation...conjugation occur in nature as forms of HGT, but transfection is unique to the lab. Let’s take a look at these...only done in eukaryotic cells. Transfection is the process by which foreign DNA is deliberately introduced...
  3. Minigenomes - a Safe Way to Study Dangerous Viruses Like the Ebola Virus

    Type
    Blog Post
    ... lines that are highly transfectable.  The amounts of each plasmid transfected into cells are also extremely...each encoded on separate plasmids and are co-transfected into cells alongside a plasmid encoding the minigenome...expression levels of each gene by altering the amount transfected (see Technical Tips). Minigenome replication ...VP30, L, and the minigenome) are efficiently transfected into cells. All of these components are necessary... format). However, since plasmid quality and transfection efficiency may vary between labs, initial titration.... This can be accomplished in multiple ways: transfecting with an additional plasmid containing the T7...
  4. Zhang Lab's CRISPR Frequently Asked Questions

    Type
    Collection
    ...positively transfected. Alternatively, you can use a selection marker to select transfected cells (for..., the most efficient and easiest way is to co-transfect several plasmid together, with each plasmid having...two spacers for each locus into PX330, then co-transfect or delivery the two plasmids together into your...run them and then select the best guide to co-transfect in HR donor. Alternatively, a new system described...oligo is fine based on new data). For general transfection, you could use 1ul of 10uM oligo stock for each... or mutation. Each arms is around 800bp. For transfection in cells like HEK, we use around 400ng of a ...single-point mutation, the best HR template for transfection is probably a single stranded DNA (ssDNA) oligo...
  5. Hassle-free 96-well Format Epitope Tagging Using Cas9 Ribonucleoprotein

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    Blog Post
    ...complex. This complete transfection mix, i.e. csRNP plus ssODN, is then transfected into stem cells. Cells... were transfected in 96-well format using an Amaxa Shuttle device; 5 days after the transfection, the ...Prepare cells for transfection, add csRNP and ssODN to the cell suspension, transfect and let cells recover...selection of transfection buffer and electroporation pulse program to achieve high transfection efficiency...delivered into cells; for each cell type, the transfection/delivery step needs to be optimized to achieve.... To calculate the tagging efficiency in the transfected cells, we count the number of tag-positive cells...
  6. Delivery Methods for Generating iPSCs

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    Blog Post
    ...The typical drawbacks of using transfection will still exist: transfection efficiency is cell-type dependent...cells Limited genomic integration Multiple transfections required Need to sequence to verify there’s ...High Transgene-free and vector-free Multiple transfections required Protein Delivery DNA-Free Low High...cloning capacity of ~9-14 kb. This system is transfected into cells as a donor plasmid containing the ...with plasmid-based expression requires serial transfection of 1 or 2 plasmids that express the reprogramming...describes a protocol for generating iPSCs by plasmid transfection where 2 of 11 clones tested had plasmid integration...integration. Another challenge is that multiple transfection makes it difficult to control the dose of plasmid...
  7. Selecting Your Plasmid Purification Kit

    Type
    Blog Post
    ...important reactions like PCR or restriction digests. Transfection Grade DNA (high quality/high quantity) – Depending...Depending on the experiment, mammalian cell transfections can require quite large amounts of DNA (easily...that may not be explicitly labeled as “yeast”, “transfection-grade”, or “large plasmid” may be suitable for...automation-friendly Not mentioned Endotoxin-free, transfection-grade, BAC Millipore Sigma Column, plate Mini...automation-friendly Mentioned Endotoxin-free, transfection-grade Promega Beads, column, plate Mini, midi...well plates, automation-friendly In progress Transfection-grade Qiagen Column, plate Mini, midi, maxi...plates, automation-friendly Some Endotoxin-free, transfection-grade, BAC Thermo Fisher Beads, column, plate...
  8. Quick Guide to All Things Lentivirus

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    Blog Post
    ...you don’t have any experience in transfection, CaCl2 transfection is a simple and cheap technique that...electrical (electric current forming membrane pores) transfection. These techniques are still used and efficiently...cells or non-dividing cells. To target these un-transfectable cells, labs use viral vectors and particularly...particles themselves. For this you will first need to transfect producing cells, usually 293T cells, with your...packaging plasmids. For this, you can use the transfection reagent you are most comfortable with. If you...that should work well. Quickly after transfection (4-8h), cells start releasing viral particles into the...the supernatant containing viruses 24h after transfection. This supernatant can be stored at 4 °C or can...
  9. CRISPR/Cas9 FAQs Answered!

    Type
    Blog Post
    ...positively transfected. Alternatively, you can use a selection marker to select transfected cells (for...Before starting your experiment, consider co-transfecting with GFP. This allows you to sort for GFP-positive...resistance cassette, such as PX459). After you co-transfect the CRISPR/Cas system with your homologous recombination...
  10. CRISPR 101: Mammalian Expression Systems and Delivery Methods

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    Blog Post
    ...system. CRISPR reagents can be delivered via transfection, nucleofection, viral transduction or injection...or gRNA in a mammalian cell line that can be transfected at high efficiency. Lentiviral transduction...mammalian cell lines. Useful for difficult to transfect cell types and can be used in vivo. A common choice... of common  delivery methods below: Chemical transfection   Lipid mediated Cationic polymers Calcium...Medium Difficulty Easy Easy Easy Physical transfection   Electroporation / Nucleofection Microinjection...
Showing: 11 - 20 of 144 results