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  1. High Complexity Golden Gate Assembly with NEB’s DAD

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    Blog Post
    ...cycling 4-base Bsal-HFv2 37-16 °C cycling 4-base BsmBI-v2 42-16 °C cycling 4-base ... 1 hour 3-base or 4-base T4 DNA ligase 25 °C 18 hours 3-base or 4-base T4 DNA ligase... 1 hour 3-base or 4-base T4 DNA ligase 37 °C 18 hours 3-base or 4-base Bbsl-HF®, 1x ...Ligase MM 37-16 °C cycling 4-base Bsal-HFv2® 37 °C Static 4-base Bsal-HFv2, 1x NEBridge...-16 °C cycling 4-base PaqCl, 1x NEBridge Ligase MM 37-16 °C cycling 4-base Sapl              ...overhangs with the same three nucleotides in a row; (4) no more than two nucleotides in the same position...used. Each of the tools works with either 3-base or 4-base overhangs, and with a variety of different enzymes...
  2. Brain Initiative Collection

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    Collection
    ...Fishell 83897-AAV1 pAAV-hDlx-GqDREADD-dTomato-Fishell-4 Gq-DREADD (P2A) nuclear dTomato expression in forebrain...Fishell 83897-AAV9 pAAV-hDlx-GqDREADD-dTomato-Fishell-4 Gq-DREADD (P2A) nuclear dTomato expression in forebrain...Fishell 83897-AAVrg pAAV-hDlx-GqDREADD-dTomato-Fishell-4 Gq-DREADD (P2A) nuclear dTomato expression in forebrain...particles that are suitable for in vivo use. Learn more about our viral service ID Viral Prep Description PI 65417...well as by our trusted partner labs. Learn more about our antibodies ID Recombinant Antibody Reactivity...
  3. TALEN Guide

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    Collection
    ...Move over ZFNs. Nat Biotechnol. 2011 Aug 5;29(8):681-4. Pubmed PMID: 21822235 . See the Q&A with Dr. Adam...researchers who are learning to wield them. Learn more about Addgene’s TAL effector and TALEN kits here . References...
  4. Lentiviral Prep Service

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    Collection
    ...Resistance Purpose PI 17446 pLenti CMV GFP Hygro (656-4) GFP Hygromycin 3rd gen lentiviral eGFP expression...are reported with each shipment. For more details about our viral vector packaging service, visit our Viral...
  5. Who Gives a Tweet? 9 Facts About Scientists on Twitter

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    Blog Post
    ...scientific authorship in the United States (0.428). 4. The #1 (re)tweeted domain by scientists was Instagram...Sciencemag, Wiley, Cell and Scientific American Figure 4: Top Scientific Domains Tweeted by Biologists. 7. ...and analysis of scientists on Twitter. Plos One,12(4). doi:10.1371/journal.pone.0175368. PubMed PMID: 28399145...use Twitter professionally to network, learn more about alternative careers for scientists, and share cool....” This paper addresses the following questions about scientists on Twitter: who are they? What do they...
  6. Fluorescent Protein Guide: FRET

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    Collection
    ...standard consisting of ECFP and EYFP connected by 4 GGSGGS repeats pET28CLY5 Peptide linker standard consisting...constructed using the cpFRET kit from the Pertz laboratory. Empty Vectors Encoding Fluorescent Proteins ...
  7. Multiplex Genome Editing with CRISPR-Cpf1

    Type
    Blog Post
    ....4% of HEK293T cells had edits at 4 of 4 targets when an array of 4 crRNAs, Cpf1, and a GFP tag were transfected...crRNAtracrRNACas9 crRNACpf1 Endonuclease size spCas9: ~4 kbsaCas9: ~3 kb ~3.9kb crRNA/gRNA length gRNA: ...transduction One vector expresses Cas9, eGFP, and up to 4 gRNAs Each gRNA requires its own promoter   Kabadi... this by showing that Cpf1 can cleave an array of 4 crRNAs in vitro and when expressed in 293 cells. This...Lastly, an AAV vector was used to multiplex edit 3-4 genes in a primary culture of mouse neurons and in...targets compared to Cas9.  Read on to learn more about Cpf1 multiplexing.  For an in-depth review of Cpf1... Addgene. If you have any questions or thoughts about Cpf1 multiplexing, leave them in the comments below...
  8. pCXLE toolkit: Efficient episomal plasmid-based method to reprogram peripheral blood cells to iPSCs

    Type
    Blog Post
    ...pCXLE-hUL 27080 L-MYC and LIN28 pCXLE-hOCT3/4-shp53-F 27077 OCT3/4 and shRNA against p53 pCXWB-EBNA1 37624...the expression of the reprogramming factors- OCT3/4, SOX2, KLF4, and C-MYC [1]. For the derivation of ...and remains a safety concern in the clinical field [4]. Three major reprogramming methods are considered...mixture of two vectors that encoded six factors - OCT3/4, SOX2, KLF4, C-MYC, LIN28 and SV40 large T antigen...PMID: 21243013. PubMed Central PMCID: PMC3193421. 4. Hacein-Bey-Abina, S., et al., LMO2-associated clonal...activated T cells and Sendai virus. Nat Protoc, 2012. 7(4): p. 718-28. PubMed PMID: 22422317. 6. Diecke, S.,...successfully to derive iPSCs from PBMCs. Most laboratories use Sendai virus to reprogram PBMCs efficiently...
  9. Tips for a 1st Time CRISPR User (by a 1st Time CRISPR User)

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    Blog Post
    ... BRAF sites targeted by my specific gRNAs (Figure 4). The most difficult part of the assay was designing...surveyor assay itself was relatively easy. Figure 4: Detection of edited BRAF genomic loci in Cas9-expressing... cells transduced by the control GFP-gRNA (Figure 4, 5). When the gel was overexposed, I could even also...results. (Figure 5). The digestion product (Figure 4, lanes 0.3 % 3.0, Figure 5, lane 2) is faint, so comparing... comparing it to the undigested control (Figure 4, lane 0, Figure 5, lane 1) is what confirms it’s a real... control (GFP gRNA-targeted) BRAF sites (lanes 3, 4) were used as controls. Duplexes were generated from...amplification products (GFP-GFP duplex) as a control. 4. After optimizing the reaction and confirming the ...
  10. Top Requested Lentivirus and AAV of 2016

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    Blog Post
    ...transduced area. Gene Ther. 2003 Feb;10(4):337-47. PubMed PMID: 12595892. 4. Sanjana NE, Shalem O, Zhang F. Improved...contains a double floxed human muscarinic receptor 4 (Gαi-coupled) DREADD fused to mCherry, all under the...feeding behavior in mice. J Clin Invest. 2011 Apr;121(4):1424-8. PubMed PMID: 21364278. PubMed Central PMCID...CRISPR screening. Nat Methods. 2014 Aug;11(8):783-4. PubMed PMID: 25075903. PubMed Central PMCID: PMC4486245...Resources on the Addgene Blog Learn More About Lentivirus Learn more About AAV Get the Scoop on Our Viral Service...
  11. Back to Bacteria: CRISPR gRNA Multiplexing Using tRNAs

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    Blog Post
    ...nuclease Csy4 from Pseudomonas aeruginosa to cleave 4 gRNAs separated by 28 base Csy4 recognition sites ...7 base poly(U)tail in tRNA-gRNA constructs or a 1-4 base tail from the second tRNA in the tRNA-gRNA-tRNA...al. constructed PTGs containing 8 gRNAs targeting 4 MAPK genes, again using rice protoplasts. Each pair...large deletions. They detected fragment deletion with 4-20% frequency at the four loci, indicating that Cas9..., Perez-Pinera P, Lu TK. Mol Cell. 2014 May 22;54(4):698-710. doi: 10.1016/j.molcel.2014.04.022. Epub ...with limited packaging capacity. Still confused about the various tRNA expression strategies? No worries... Addgene. If you have any questions or thoughts about this technology, leave them in the comments below...
  12. CRISPR 101: Multiplex Expression of gRNAs

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    Blog Post
    ...plasmids are digested, unique overhangs (here, O1-4) adjacent to the cut sites “link” fragments together...plasmids: This plasmid set allows you to express 2-4 gRNAs, with four being the ideal number. First you...clone, from 2-7. For example, if you’re expressing 4 gRNAs, you’d use pX330A-1x4; for 6 gRNAs, you’d use... Plasmids: These plasmids allow you to assemble 2-4 gRNAs through Golden Gate or Gibson Assembly. gRNAs...all-in-one CRISPR/Cas9 vector system.” Scientific Reports 4 (2014): 5400. PubMed PMID: 24954249. PubMed Central...PMC4066266. Find plasmids from this paper at Addgene. 4. Albers, Joachim, et al. “A versatile modular vector... genetics.” Journal of Clinical Investigation 125(4) (2015):1603-19. PubMed PMID: 25751063. PubMed Central...
  13. 5 Tips for Troubleshooting Viral Transductions

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    Blog Post
    ...ultracentrifugation (75,000 - 225,000 g for 1.5 – 4 hours at 4 °C). After ultracentrifugation, virus may appear...researchers prefer to store freshly harvested virus at 4 °C instead of storing it briefly at -80 °C. If troubleshooting...more concentrated virus solution can be obtained. 4. Enhancing virus-cell contact A variety of reagents...Physiology 291.2 (2006): C386-C392. PubMed PMID: 16510845. 4. Krajden, Mel, et al. "Effect of multiple freeze-thaw...grown at 30 °C instead of 37 °C. If you’re unsure about the integrity of your virus, perform a diagnostic...Additional Resources on the Addgene Blog Learn All about Adenovirus Associated Virus New to Virus? Check ...Check out Our Primer for Beginners! Learn All about Lentiviral Vectors Additional Resources on the Addgene.org...
  14. CRISPR Kinome Libraries Available: Pooled and Individual Plasmid Formats

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    Blog Post
    ...two sets, each with 4 gRNAs per kinase, so screens can be performed with either 4 or 8 gRNAs per gene....the human kinome. These plasmids contain the same 3-4 gRNAs found in the first subset of the pooled library...numbers that’ll leave you, well, #sad. Learn More About CRISPR Pooled Library Screening Why the kinome?...
  15. Tetracycline Inducible Expression

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    Collection
    ..., Hillen W, Berens C. Biotechniques . 2004 Oct;37(4):546, 548, 550. PubMed . Optimization of the Tet-On... or shRNA; see article for detailed information about cloning and additional plasmids tetR-KRAB On Aebischer...
  16. Important Considerations When Using AAVs

    Type
    Blog Post
    ..., hippocampus and cortex) within the mouse brain (4). An example from the cortex is outlined in the table...velocities of movement, distance traveled, etc.) (4). This has also been identified with AAV2 (5), AAV6... vector using a serotype with strong CNS tropism (4). If axonal transport is not desirable, transport...serotype with weak CNS penetrance (such as AAV2) (4). Otherwise, using a specific system for controlling...shortened (from ~4.8 kB [8] to ~2.3 kB [9]).     4. The Future What new types of research may be enabled...PMID: 24086725. PubMed Central PMCID: PMC3785459. 4. Castle, Michael J., et al. "Adeno-associated virus... Its Fruit Is Sweet The Future? I knew little about adeno-associated Viral Vectors (AAVs) before starting...
  17. Plasmids 101: Knockout/Knock-In Plasmids

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    Blog Post
    ...only and leave exon 2 floxed, as seen in line 4 of Figure 4. Since the loxP sites are located in intronic...the targeted exon in the gene of interest (Figure 4). When recombination occurs, the gene still functions...has been placed into an intron.    Figure 4: A targeting vector to create a floxed allele for ...inserted GFP is expressed (knocked in). As seen in the above example, you can remove a floxed resistance gene...Get the Basics of Homology Directed Repair Read about Generating Knockouts with CRISPR through Non-Homologous...Expression Vectors Find Cre-Lox Plasmids Learn More about CRISPR  ...
  18. CRISPR/Cas9 FAQs Answered!

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    Blog Post
    ...most popular questions and answers. Here are just 4 of the CRISPR-Cas9 FAQs. If you still have more questions...based on the Cas9 D10A nickase described in Figure 4 of the Cong, et. al, 2013 Science paper. For example...Restriction Fragment Length Polymorphism (RFLP) (see Figure 4 of the Cong, et. al, 2013 Science paper). If you detect... gRNA design tools Need more questions answered about CRISPRs? Check out the full list of 16 FAQs answered...
  19. Technical Design of a Western Blot

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    Blog Post
    ...250 kDa Different sizes 4–12% gradient 4–250 kDa Different sizes 4–20% gradient   Handcast...length of your assay. The most common options are 4 °C overnight or 1–2 hours at room temperature (RT)...choose to incubate their primary antibody overnight at 4 °C and their secondary antibody for 1–2 hrs at room...expensive, reduce protocol time, can be stored at 4 °C, and are very consistent gel-to-gel.  Ladder Whatever... stored at your bench during the procedure and at 4 °C when you’re not running a western. They are not...and will noticeably degrade after several months at 4 °C.  Pro tip! If you get a speckled image, your protein-based...If you’ve ever run a western blot, or thought about running one, you’ll know there’s a lot of choices...
Showing: 21 - 40 of 398 results