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  1. Pushing the Limits of DNA Assembly

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    Blog Post
    ..., performing PCR to generate the mutation and linearizing your vector (preferably by PCR) for DNA assembly...Regions of homology can be introduced to fragments via PCR using primers that contain the regions of homology...fragments are added, deleted, or reordered and PCR enzymes are adjusted. Appropriate fragment and primer design...scarless DNA – perfect for transforma­­­tion or as a PCR template. Some of the applications of the NEBuilder...selectable marker, and target gene, for example, are amplified with overlapping regions of homology and inserted... Based Cloning Methods Screen Plasmids by Colony PCR Addtional Resources on Addgene.org Browse Our CRISPR...standardized DNA constructs, but its use of Type IIS restriction enzymes results in scarless assembly. Finally...
  2. Plasmids 101: 5 factors to help you choose the right cloning method

    Type
    Blog Post
    ...simply PCR-amplify your vector and your insert, DpnI digest away the templates, and transform the PCR products...coli then fuse together the PCR products via overhangs left over from the PCR process (the precise mechanism...generating the appropriate inserts by PCR, there is no need for restriction digests, gel purifications, or ligations... In this technique, you first perform a round of PCR to generate DNA fragments with 15-40 bp of homology...particularly tight? Most cloning processes will require a PCR reaction or two to generate templates for the cloning...of all the options discussed as it only requires PCR and the inexpensive DpnI enzyme. Otherwise you let...to cloning different types of DNA, such as cDNA, PCR fragments, or genomic DNA. Also remember that commercially...
  3. Building and Validating Recombinant Antibodies: A Case Study

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    Blog Post
    ...used as a template for PCR amplification with a degenerate primer set to amplify IgG variable light (VL... then verified by both diagnostic restriction digest and colony PCR.   Fig. 1: (A) Schematic of... and variable heavy (VH) chain sequences. Fusion PCR was performed to create an amplicon that  was cloned... for some constructs more than 90% of the colony PCR validated clones unexpectedly failed to produce functional...chain sequences. By performing a BciVI digest of the PCR products prior to cloning, which in most cases left...activated B cell that produces the antibody of interest with a myeloma cell. This RNA was then used to... found that the recognition sequence for the restriction enzyme BciVI was present in the aberrant light...
  4. Deep Mutational Scanning with One Pot Saturation Mutagenesis

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    Blog Post
    ...Error-prone PCR: This method amplifies the wild-type template with a “sloppy” version of PCR that results...mutagenesis (SDM) PCR, but with a twist since it relies on the sequential nicking, degradation, and PCR-generation...a universal primer is used for this round of PCR. The PCR product is digested with DpnI to remove residual...that tile across a region of interest, generating multiple mutants in one PCR reaction. Below is a step-...of up to 2% per nucleotide position. The “sloppy” PCR reaction is created by making some or all of the ...increased concentration of Taq polymerase, 2) increased PCR extension time, 3) increased concentration of MgCl2...ssDNA as template for a site-directed mutagenesis PCR that uses mutagenic primers to introduce all desired...
  5. 5 Tips for Troubleshooting Viral Transductions

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    Blog Post
    ...perform PCR against components of the viral vector using the harvested viral solution as a PCR template...virus-based experiment at one point or another. After amplifying a viral vector, collecting virus, and transducing...replication. To avoid genomic rearrangements, try amplifying the viral vector with bacteria designed to minimize...integrity of your virus, perform a diagnostic restriction enzyme digest and compare it to some reliable... use the virus immediately upon harvesting. Interestingly, freeze-thawing host cells immediately prior...24003179. PubMed Central PMCID: PMC3760253. 2. Rohwer, Forest. "Global phage diversity." Cell 113.2 (2003): 141...
  6. CRISPR 101: Validating Your Genome Edit

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    Blog Post
    ...TIDE First, use PCR to amplify the target region of interest. Then Sanger sequence the PCR product of both...screening by PCR may be the way to go. Design a PCR to flank your desired edit site and run the PCR product... can screen using PCR and a restriction enzyme digest.   Fig. 3: Restriction enzyme screening ...your sgRNA-Cas9 combo. Pro tip: When designing your PCR, ensure there is at least ~200 base pairs of sequence... you’re in luck! You don’t need to sequence your PCR to visualize an edit. Most dual guide systems generate...enough that it can be visualized by running your PCR on a gel. It’s still paramount that you sequence ...or deleted accordingly. Pro tip: make sure your PCR amplicon isn’t too large so that you can easily visualize...
  7. Intro to Our Summer SciComm Series!

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    Blog Post
    ...definition) in a specific field.  For example, while “PCR test” has recently transitioned from jargon to non-jargon...jargon in most other uses. Many laypeople would use “PCR test” to mean “a test that uses a biological sample...sequence that uses trprimers and enzymes that will amplify a sequence only if present.” You can see how you...of knowledge or interest in STEM subjects; we generally refer to them as the “interested public.” Subscribers...to Scientific America would be considered the interested public and it would be safe to assume that they...age range, familiarity with the subject, shared interests, socioeconomic and/or racial/ethnic background...example adults 45-55 yrs old who breed or are interested in breeding dogs who also enjoy listening to ...
  8. DNA Purification Without a Kit

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    Blog Post
    ...the cellulose directly into a PCR buffer, where DNA or RNA can be amplified. Compared to a commercial magnetic...purification Starting material: PCR product or agarose gel slices Product: purified PCR product or DNA fragments...method for regenerating silica columns that come with PCR product purification or DNA gel extraction kits. ...Rapid Regeneration and Reuse of Silica Columns from PCR Purification and Gel Extraction Kits. Scientific ...was free of agarose and could be digested with restriction enzymes.  Cellulose nucleic acid purification... still be eluted from the column, as detected by qPCR, but this did not reduce cloning efficiencies.  ...
  9. Plasmid Cloning by PCR (with Protocols)

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    Protocol
    ... cDNA library, or by RT-PCR. Isolate your PCR product from the rest of the PCR reaction using a kit, such...Experimental Procedure Run PCR and Ppurify the PCR Product Run PCR to amplify your insert DNA. It is important... Protocols Plasmid Cloning by PCR Plasmid Cloning by PCR You may also like... Restriction Digest...window) QIAquick PCR Purification Kit . The PCR product is now ready for restriction digestion. Digest... your PCR product is the anticipated size and that your band is strong (indicating that the PCR reaction... to be amplified (the ORF in this case), not the Tm of the entire primer. If you are amplifying from a...Your Gene of Interest (YGOI) for ligation into a recipient plasmid. Designing Primers for PCR Based Cloning...
  10. PITChing MMEJ as an Alternative Route for Gene Editing

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    Blog Post
    ...Select for puromycin resistant cells Step 5: PCR amplify and sequence the locus to verify correct GFP-... required by MMEJ can easily be added via PCR amplification. Given the inefficiency of HDR for knock-ins...microhomologies are added to the GFP-Puro cassette via PCR, and this construct is inserted into the PITCh vector...target near the last coding exon of your gene of interest. For ideal use, this gRNA should be cloned into...endogenous promoter and the 3’ UTR of the locus of interest, since the GFP-Puro will be inserted just upstream...nucleases and their applications. It will be interesting to see what new editing possibilities MMEJ can...
  11. When Fidelity Matters: A frank discussion about ligase fidelity

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    Blog Post
    ... the sequence of interest are annealed to target DNA (genomic DNA or a PCR amplified fragment) and treated..., Francis. "The ligase chain reaction in a PCR world." PCR Methods Appl 1.1 (1991): 5-16. PubMed PMID:...chain reaction (LCR)-overview and applications." PCR Methods Appl 3.4 (1994): S51-64. PubMed PMID: 8173509...bacterial pathogens by use of a novel 16S rRNA gene PCR-ligase detection reaction-capillary electrophoresis.... 18. Hommatsu, Manami, et al. "Development of a PCR/LDR/flow-through hybridization assay using a capillary...Pushing the Limits of DNA Assembly Plasmid Cloning by PCR Resources on Addgene.org Basic Molecular Biology...joining for recombinant plasmid construction (restriction cloning), adaptor ligation for next generation...
  12. Tips for CRISPR Gene Editing in Mice

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    Blog Post
    ...base pair sequence surrounding your gRNA. Once amplified, you can insert this region into a pCAG-EGXXFP...primer sets to use to genotype your pups. A simple PCR with these primers will let you know if there are...are any major deletions, and sequencing of the PCR products will give specific details on what exactly ...alleles are present in these mice, you can clone the PCR products into a pBluescript cloning vector and sequence... delete the entire gene? Perhaps you are more interested in the c-terminus and would like to target that...
  13. Zhang Lab's CRISPR Frequently Asked Questions

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    Collection
    ...better for PCR and surveyor. I used DNA polymerase Takara Ex Taq ™ DNA Polymerase for my genomic PCR, but couldn't...conditions with 5% DMSO or without 5% DMSO. My genomic PCR didn’t work, do you have any suggestions? The Zhang...the protocol, then uses around 2-4ul in each 50ul PCR reaction. The gDNA extracted in this way is usually...groups have successfully used Herc II or Kapa Hifi in PCR. Maybe this Takara enzyme is not very robust in this... couldn't amplify the EMX1 gene using same primer you used in the Science paper ( Cong et al. , Science...template, you could then: Confirm your HR by doing Restriction Fragment Length Polymorphism (RFLP) ( see Figure...
  14. Protocol - How to Design Primers

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    Protocol
    ...Reaction Plasmid Cloning by PCR Agarose Gel Electrophoresis Primer Design for PCR Oligonucleotide primers ...Tips on designing primers for PCR Protocols...primers are necessary when running a PCR reaction. One needs to design primers that are complementary to the...On average, the DNA fragment that needs to be amplified should be within 1-10 kB in size. The structure...protocol video below to learn how to design primers for PCR. Reference Page Top Index...important as well. Short primers are mainly used for amplifying a small, simple fragment of DNA. On the other...other hand, a long primer is used to amplify a eukaryotic genomic DNA sample. However, a primer should not...
  15. Lambda Red: A Homologous Recombination-based Technique for Genetic Engineering

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    Blog Post
    ...inserts can be made by PCR using primers that amplify the DNA sequence of interest and flank it with 50 ...modification. Colony PCR can be used to screen for positive clones in most cases, and restriction enzyme digest...recombineering substrates to avoid errors introduced during PCR. ssDNA Substrate ssDNA substrates can be generated...ordering synthetic oligonucleotides or denaturing short PCR products. Either way, the substrate should be ~70...Restriction enzyme cloning is the workhorse of molecular cloning; however, one of its biggest limitations...that sequence modifications can only be made at restriction enzyme cut sites. The lambda red system is an... of DNA within E. coli and is independent of restriction sites. The lambda red system is derived from ...
  16. Analyzing CRISPR Editing Results with ICE from Synthego

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    Blog Post
    ...edited and unedited (control) populations is PCR-amplified and Sanger sequenced. ICE compares these sequence...sample names and guide sequences, and ICE will do the rest. There are no parameters that need optimizing and...This score is a useful measure for those who are interested in understanding how many of the contributing...
  17. Finding nucleic acids with SHERLOCK and DETECTR

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    Blog Post
    ...from a sample is first amplified using RPA (recombinase polymerase amplification) or reverse transcriptase...transcription to convert amplified DNA to RNA for subsequent detection by Cas13. This amplification step in combination...sensitivity, the DNA is first amplified through isothermal amplification by RPA. When Cas12a-cRNA base...nuclease, can be used in conjunction with Cas13 to amplify the signal of a single target. Csm6 can cleave ... the Cas13 reporter), they could significantly amplify the detection signal for a single target. SHERLOCKv2...laboratories. In the case of the COVID-19 pandemic, qPCR can be used to diagnose the presence of SARS-CoV...presence and quantity of DNA, RNA or a mutation of interest. Together SHERLOCK and DETECTR demonstrate the...
  18. What is Polymerase Chain Reaction (PCR)

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    Protocol
    ...Reaction (PCR) Polymerase Chain Reaction (PCR) You may also like... Plasmid Cloning by PCR Restriction Digest... how to perform Polymerase Chain Reaction (PCR). Basic PCR Program Initial Denaturation for 2 minutes ...strands. Materials List Reagents for each 50µL PCR: Thin-walled PCR tube Ice Bucket 2 μL Template DNA (10 ng...Polymerase (5 units/μL) PCR Machine Agarose Gel Procedure Primer Design and PCR Design Primers. See our...volume of master mix to add to each PCR tube. Secure the tops to the PCR tubes, gently tap each tube to bring...cloning by PCR to learn how to design primers for cloning purposes. What do I do if my PCR isn't working...Information A standard Polymerase Chain Reaction (PCR) is an in vitro method that allows a single, short...
  19. Adenoviral Vector Production and Troubleshooting

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    Blog Post
    ...and clump together ~3 days post infection. The amplified virus can be harvested once roughly 50% of the...the purified virus should be ~1.3 Quantitative PCR: the number of viral DNA packaged in virions is determined...for amplification. The final purified plasmid stock should be analyzed by endonuclease restriction digest...transduced cells and loss of transgene expression (Interestingly, the strong immunogenicity of AdVs is what makes... in trans. The Gutless AdV have generated high interest for gene therapy due their increased cloning capacity...AdV can be found in reference 3. Production, amplification, and quality control of 2nd generation AdV   ...plasmids: a shuttle vector (in which the transgene of interest is cloned) and pAdEasy™ which contains the adenoviral...
  20. Production of Virus in Insect Versus Mammalian Cells

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    Blog Post
    ...titrated following purification using qPCR or digital droplet PCR. Insect cells Insect cells are a less... P0), infecting new Sf9 cells, and getting an amplified P2 virus. This P2 virus can be produced in a greater...plasmids — a transfer plasmid containing your gene of interest plus two packaging plasmids (three packaging plasmids...
Showing: 21 - 40 of 70 results