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We narrowed to 28 results for: dna oligonucleotides

Showing: 1 - 20 of 28 results
  1. Fluorescent Proteins 101: Aptamer Fluorophores

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    Blog Post
    ...meaning “to fit”. SELEX could be used to classify DNA aptamers as well, and over the course of the next... exponential enrichment (SELEX), some 1010 oligonucleotides could be screened for their affinity to a ...several different ways. Researchers have used oligonucleotides in fluorescent visualization techniques for...relatively bulky. One of the advantages of oligonucleotides over proteins is their modularity, which is...- bypassing translation altogether with an oligonucleotide-only sensor could save precious minutes in ...
  2. Generating Mouse Models Using CRISPR/Cas9

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    Blog Post
    ...creates the DNA double-strand break (DSB) at the target site, and a donor oligonucleotide or plasmid as...create a mouse model, the gRNA, Cas9, and donor oligonucleotide or plasmid components are brought together .... Alternatively, the gRNA, Cas9, and donor oligonucleotide can be electroporated into the mouse zygote...repair material is provided (in the form of an oligonucleotide or plasmid), precise changes can be made in...frameshift mutation. For knock in with a donor oligonucleotide, we aim to generate 50 to 100 mice and are ...
  3. CRISPR 101: Multiplex Expression of gRNAs

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    Blog Post
    ...to express multiple gRNA from a single construct. DNA and gRNA are not to scale.   Let’s start with...cytidine deaminase fusion with Cas9 with a uracil DNA glycosylase inhibitor with a degradation tag (LVA...promoters. To use this plasmid, you simply order oligonucleotides for your chosen gRNA target sequences and ...Cas9 Golden Gate multiplexing is to clone the oligonucleotides specifying each gRNA target sequence into ...rectangles) are cloned into various plasmids using oligonucleotides. These plasmids contain Type IIS restriction...the gRNA scaffold are provided with the kit. Oligonucleotides specifying the gRNA seed sequence should be...you to express two gRNAs constructed using oligonucleotide assembly.  Unlike some of the plasmids described...
  4. CRISPR 101: Making a Knock-In Cell Line

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    Blog Post
    ... frequent DNA repair mechanism in general. On average, it accounts for less than 10% of DNA repair, with...though exogenous DNA can be used as well. Below are some considerations for designing donor DNA for successful...homology-directed repair pathway, designing the best donor DNA, and avoiding common mishaps in this class of genome...knock-out. The goal of a knock-out is to disrupt DNA translation by generating a frameshift mutation. ...knock-ins. Knock-in mutations typically require an exact DNA sequence to be incorporated at a precise genomic ...which is done through the design and use of a donor DNA molecule. Your donor molecule will need to have homology...This homology will guide the cell to use the donor DNA as a template for repair, which will result in the...
  5. CRISPR 101: Cas9 Nickase Design and Homology Directed Repair

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    Blog Post
    ...In this post, we’ll summarize how IDT (Integrated DNA Technologies) first demonstrated how CRISPR nickases...IDT Ultramer® Oligonucleotides) Use 100 nt homology arms for large insertions (long ssDNA; IDT Megamer®...insert an EcoRI site using a single-stranded oligonucleotide (ssODN) donor. Using a D10A nickase to insert...Megamer® ssDNA Fragments) Test both bottom and top strand ssDNA donors (if possible) The text and images...longer insertion (mCherry) using IDT Megamer long ssDNA with 100 nt homology arms. Schubert and Yan next...
  6. Human Germline Editing Using CRISPR

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    ...oocytes, thus allowing repair to take place before DNA replication. Indeed, they observed that 41/42 embryos...editing.’ While repair using endogenous chromosomal DNA is appealing for heterozygous mutations, it will ... homozygous mutations. Moreover, introducing new DNA seems impossible with current tools, thus quieting...underwent repair not from the single-stranded oligonucleotide (ssODN) template supplied by Ma et al., but...allele rather than the supplied single-stranded oligonucleotide (ssODN) template. Embryos also underwent editing...
  7. Plasmids 101: Biotinylation

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    Blog Post
    ...BirA at Addgene! Oligonucleotide labeling Biotin can be added to either terminus of a DNA sequence during...to an oligonucleotide depending on your downstream application. Biotin labelled oligonucleotides can be...Photobiotin can be used to non-selectively label DNA and RNA. Photobiotin acetate consists of a biotin...electrophoretic mobility shift assay to examine specific dsDNA, ssDNA or RNA–protein interactions.” Nucleic Acids ...
  8. Comparing Cas9 to NgAgo: Can the Argonautes Best CRISPR?

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    ...GC-rich regions. DNA guides NgAgo uses 5’ phosphorylated DNA guides (so called “gDNAs”) rather than the...that this protein could cleave DNA in vitro, directed by phosphorylated DNA guides. Unfortunately, Swarts... guide DNA and cannot switch guides. While this fidelity would prevent other small nuclear DNAs from binding...publication at Addgene. 2. Swarts, Daan C., et al.  “DNA-guided DNA interference by a prokaryotic Argonaute.” Nature...archaeon Pyrococcus furiosus is a DNA-guided nuclease that targets cognate DNA.” Nucleic Acids Res. 43(10) ... 24 base DNA guides may be more user-friendly, since they can be ordered as oligonucleotides and should...going gaga over the newest gene-editing protein - a DNA-cleaving Argonaute from Natronobacterium gregoryi...
  9. CRISPR Challenges: Standardization and Homology Directed Repair

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    ...grasped just how complicated DNA repair pathways are. I fully admit to being a DNA repair newbie - diagrams... that, we need to learn much more about cellular DNA repair pathways. An emphasis on cellular repair post-CRISPR...introduction to CRISPR nucleases, but with a session on DNA repair. What stuck most in my mind from that session...of interest in base editors, which alter genomic DNA without the need for cellular HDR.   Having had time...coming to #KSgenome and seeing the intricacies of DNA repair has emphasized how essential these studies... blog posts to help you tackle the challenges of DNA repair (with bonus gRNA design resources.) Subscribe...distance affects editing efficiency. Optimizing Donor DNA for Enhanced CRISPR Genome Editing Chris Richardson...
  10. Targeted Mutagenesis with EvolvR

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    ...molecular biologists use to tinker with DNA. Making changes to a DNA sequence can help scientists identify... is used to direct the PolI3M-nCas9 complex to a DNA site of interest, which nCas9 nicks and then dissociates...dissociates from. PolI3M then binds the nicked DNA, and extends it from the 3’ end, while its native endonuclease...to a site of interest, where it nicks its target DNA (left). Cas9 dissociates and PolI binds (middle) ...increasing the standard mutation rate seen during DNA replication by 120-fold over background. Due to its... These changes promote nCas9’s dissociation from DNA after nicking and yielded an enhance nCas9 (enCas9...thioredoxin-binding domain (TBD) from bacteriophage T7 DNA polymerase increased the processivity of PolI3M, ...
  11. Plasmids 101: Golden Gate Cloning

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    Blog Post
    ...that flank their DNA fragment in an inverse orientation. This allows for multiple DNA components (promoters...sequence, they can be customized to direct assembly of DNA fragments. When designed correctly, the recognition... into a vector containing those overhangs. Entry DNA overhangs may be present in the original plasmid ...assembly require 20-40 bp of homology at the ends of DNA fragments to specify assembly order, so fragments... and BpiI/BbsI to efficiently assemble up to six DNA fragments at a time. As with all Golden Gate-based...to cut outside their recognition site and permits DNA fragments with compatible overhangs to be efficiently...which allowed for the ordered assembly of multiple DNA fragments to create TAL effector nucleases. These...
  12. Giving gRNAs a Facelift - Synthetic and Beyond

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    ...macromolecules used in scientific research such as DNA or protein. It comes as no surprise then that stability...Base modifications What is more stable than RNA? DNA! One way to make your gRNA more efficient on a budget...ribonucleotides for deoxynucleotides. A partially DNA gRNA is surprisingly well-tolerated by the Cas9 protein...use in applications like siRNA and antisense oligonucleotides. Some of these synthetic modifications, specifically...
  13. REPLACR Mutagenesis: Replacing In Vitro Recombination Methods

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    Blog Post
    ...plasmid. The parental, nonmutated DNA is digested with methylated DNA-specific enzyme DpnI, and the nonmethylated.... To make a point mutation, you design two oligonucleotide primers with the desired mutation, then use...which are proprietary. These methods also rely on ssDNA ends to match up regions of homology, so they won...
  14. CRISPR 101: Mammalian Expression Systems and Delivery Methods

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    ...deliver a donor plasmid or single-stranded DNA oligonucleotide, so you will need to make sure your expression...editing? Do you want to deliver the components as DNA, or would mRNA or protein delivery be more suitable...transduction or injection as either protein, RNA, or DNA. Finally, once you have identified the best expression...genome target sequence into EGFP reporter. Target DNA reporter system: Can evaluate component delivery ...
  15. Advancing Biology with Zebrafish: Genetic Tools for Developmental Studies and More

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    ...Creating transgenic organisms by introducing foreign DNA into the genome is useful for a variety of applications...transposon called Tol2 to randomly integrate foreign DNA into the genome. Non-random integration into specific...facile CRISPR/Cas9-mediated insertion of foreign DNA. Despite these caveats, several features of zebrafish—including...deactivation method in zebrafish are short, modified oligonucleotides called morpholinos. When injected into zygotes...
  16. Protocol - How to Design Primers

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    Protocol
    ...fragment of DNA. On the other hand, a long primer is used to amplify a eukaryotic genomic DNA sample. However...that are complementary to the template region of DNA. They are synthesized chemically by joining nucleotides...the primer corresponds completely to the template DNA strand so elongation can proceed. Usually a guanine...short. Short primers produce inaccurate, nonspecific DNA amplification product, and long primers result in...in a slower hybridizing rate. On average, the DNA fragment that needs to be amplified should be within... Gel Electrophoresis Primer Design for PCR Oligonucleotide primers are necessary when running a PCR reaction...
  17. Lambda Red: A Homologous Recombination-based Technique for Genetic Engineering

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    ...plasmid DNA or BAC DNA.  To use the lambda red recombineering system to modify your target DNA, you first... system. MMR’s job is to correct DNA mismatches that occur during DNA replication. There are two ways ...you use depends on what type of DNA you want to edit; however, BAC DNA can be modified with any of the...first electroporate a linear donor DNA substrate (either dsDNA or ssDNA – see below) into E. coli expressing...   Substrate DNA Design and Generation Whether you use a linear dsDNA or ssDNA substrate depends ...from digesting linear DNA introduced into the E. coli. Exo: Exo is a 5’→3’ dsDNA-dependent exonuclease...Substrate dsDNA inserts can be made by PCR using primers that amplify the DNA sequence of interest and flank...
  18. The Fluorescent Vegetables in Aptamer Soup

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    Blog Post
    ...winter day, you should be happy to learn that many DNA-based reagents are named for soup ingredients! From...has been used to investigate intracellular viral DNA dynamics in neuronal cells (Nilaratanakul et al.,...describes the enrichment process used to evaluate oligonucleotides for binding affinity to a specific target,...
  19. Important Considerations When Using AAVs

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    ...self-complementing structure (scAAV) (7). As single stranded DNA viruses, AAVs normally require second strand synthesis... promote efficient transduction independently of DNA synthesis." Gene therapy 8.16 (2001): 1248. PubMed...miRNAs), short hairpin RNAs (shRNAs), antisense oligonucleotides (ASOs), zinc finger nucleases, and many others...
Showing: 1 - 20 of 28 results