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We narrowed to 407 results for: abo.4

Showing: 361 - 380 of 407 results
  1. Plasmids 101: Using Transposons in the Lab

    Type
    Blog Post
    ...three transposase proteins (TnsA, TnsB, TnsC), and 4) the donor DNA or mini-transposon that contains the...Addgene blog Learn about the INTEGRATE system for bacterial genome engineering  Read about the Sleeping Beauty...DNA transposons are most commonly used in the laboratory for genome manipulation. When transposons are...Applications of transposons Now that you’ve learned about some of the popular transposon systems, let’s take...2020) Jump around: transposons in and out of the laboratory. F1000Res 9:135. https://doi.org/10.12688/f1000research...Beauty DNA transposon Learn about the piggyBac DNA transposon ...
  2. A History of Genome Engineering in Popular Culture

    Type
    Blog Post
    ...149–157 . https://doi.org/10.1038/s41586-019-1711-4 Avery OT, MacLeod CM, McCarty M (1944) STUDIES ON ...Find more blog posts about CRISPR Learn more about the history of CRISPR Read about other genome editing...Science Fiction (SciFi) writers have been curious about the capability of transforming the genetic code ... of California San Diego. She is working in collaboration with Prof. Alexis Komor and together they are...
  3. Affinity Purification of Recombinant Antibodies with Protein A or Protein G

    Type
    Protocol
    ...2 PO 4 ∙H 2 O) 610 mL of sterile sodium phosphate dibasic (NaH 2 PO 4 ) Store up to 1 month at 4 °C Adjust...phosphate monobasic monohydrate (NaH 2 PO 4 ∙H 2 O), pH 7.0 138 g NaH 2 PO 4 ∙H 2 O 1 L deionized water Adjust...sodium phosphate dibasic (NaH 2 PO 4 ), pH 7.0 142 g of NaH 2 PO 4 ∙H 2 O 1 L deionized water Adjust pH...up to 4 mL of recombinant antibody sample. Pro-Tip If the volume of the sample is greater than 4 mL , ...Equipment Class II, Type A2 Biological Safety Cabinet 4 °C Refrigerator Pipette controller Benchtop centrifuge...Protein A/G binding buffer and store in 20% ethanol at 4 °C . Pro-Tip Columns may be re-used up to 5x when ...Apply 15 mL of PBS to the reservoir of a Amicon Ultra-4 30 kDa MWCO column. Incubate for 10 min at RT . Centrifuge...
  4. Antibodies 101: Antibody Engineering and Directed Evolution

    Type
    Blog Post
    ...basis for Engineering therapeutics. Antibodies, 8(4), 55. https://doi.org/10.3390/antib8040055 Holliger...structure-guided directed evolution. The nice thing about these methods is that they all follow the same general...performance. If you are interested in learning more about antibody engineering technologies, the Institute...
  5. Viral Vectors 101: Optogenetic Tools

    Type
    Blog Post
    ...may go awry in a disease state.      Figure 4: Example of an intracellular signaling pathway activated...which tools to use, and what do you need to know about them to be successful in your experiments? In this...
  6. AAV Production in HEK293 Cells

    Type
    Protocol
    ...needed. Add stir bar and stir slowly at 4 °C for 1 h, then keep at 4 °C for 3 h without stirring to allow...Reagent Preparation DMEM Complete : 10% v/v FBS and 4 mM L-alanyl-L-glutamine (or stable alternative, such...glutaGRO 11 mL of 200 mM L-alanyl-L-glutamine. Store at 4 °C. D1 + 0.1 M sorbitol (optional) : DMEM low glucose... °C. After thawing, the solution can be stored at 4 °C for up to 2 months. After 2 months, discard the...solution may separate into phases. Aliquot and store at 4 °C. Cell Lysis Buffer : 50 mM Tris HCl, 150 mM NaCl... Tris HCl pH 8.5 + 60 mL of 5 M Sodium Chloride + 4 mL of 1 M Magnesium Chloride Close the bottle and ...Filter sterilize through a 0.22 μm membrane. Store at 4 °C. Considerations Before You Start The health of ...
  7. Kit Free RNA Extraction

    Type
    Protocol
    ...have a non-refrigerated microcentrifuge, see step 4 of either protocol before you start. Homogenizer Vortexer...freezer Reagents Solution D (for Protocol Option #1 ): 4 M Guanidinium Thiocyanate 25 mM Sodium Citrate, pH... #2) Water-saturated Phenol 2 M Sodium Acetate pH 4 Chloroform/Isoamyl alcohol (49:1) 75% Ethanol RNase-free...solution RNase free tubes: microcentrifuge tubes, 4 mL polypropylene tubes RNase decontamination solution...homogenized sample(s).Transfer tissue/cell lysate to a 4 mL tube. Add the following sequentially to 1 mL of...centrifuge the sample(s) for 15 minutes at 12,000 × g at 4°C to separate RNA from the rest of the tissue/cell...cell lysate. Pro-Tip Having your samples spin at 4°C helps reduce RNA degradation. If you don’t have access...
  8. Special Delivery: Fluorophore Targeting for FRET Studies

    Type
    Blog Post
    ...biology 370.3 (2007): 530-540. PubMed PMID: 17512008. 4. Fessenden, James D. "Förster resonance energy transfer...environment? If these are pressing issues in your laboratory, then FRET experiments are a viable biophysical...to consider these cases separately when talking about the tools that are available. Let’s consider the...that, if you make an FP fusion, you are inserting about 20-25 kDa of protein mass into your protein and ...together The FRET donors and acceptors described above can be paired together to measure a wide range of...of your protein that can lead to novel insights about its biology and its behavior. See the table below...
  9. Fluorescent Proteins 101: Monitoring Cell Mobility Using Fluorescent Proteins

    Type
    Blog Post
    ...PMID: 18261937. PubMed Central PMCID: PMC2390753. 4. Egen, Jackson G., et al. "Intravital imaging reveals...fluorescence microscope where the light source is mounted above (epi) the specimen and the excitation light passes...technique that allows imaging of living tissue up to about one millimeter in depth. Two low-energy photons ...response, but the study of these dynamics was still laborious as epifluorescence microscopy wasn’t able to give...skin. Two-photon intravital microscopy. The video above depicts the infiltration of neutrophils expressing...
  10. Protocol - pLKO.1 – TRC Cloning Vector

    Type
    Protocol
    ...days Protein knockdown (western blot) ≥4 days Phenotypic assay ≥4 days Back to Top G. Safety BL2 safety...solution is stable at 4°C for up to one year. The powder form of polybrene is stable at 4°C for several years... oligos C.3 Digesting pLKO.1 TRC-Cloning Vector C.4 Ligating and transforming into bacteria D. Screening...15-19. Avoid targeting introns. Avoid stretches of 4 or more nucleotide repeats, especially repeated Ts... 5 μL 10x NEB buffer 2 35 μL ddH 2 O Incubate for 4 minutes at 95°C in a PCR machine or in a beaker of...30 μL of ddH 2 O. Measure the DNA concentration. C.4 Ligating and Transforming into Bacteria Use your ligation... bring to 20 μL final volume Incubate at 16°C for 4-20 hours. Transform 2 μL of ligation mix into 25 μL...
  11. Immunocytochemistry

    Type
    Protocol
    ...coverslips HeLa cells 24-well plate 4% Paraformaldehyde 5 mg/mL 4′,6-diamidino-2-phenylindole (DAPI) Bovine...with 500 µL of cold 4% paraformaldehyde in PBS on ice for 15 min . Pro-Tip While 4% Paraformaldehyde fixation...20, 2022 Workflow Timeline Day 1: Seed cells Day 3-4: Fix and label cells Equipment Pipette controller ...water Microscope slide Anti-fade mounting medium Laboratory wipes 15 mL conical tubes 50 mL conical tubes...paraformaldehyde and follow your institution's laboratory safety guidelines for disposing of waste in the...remove the coverslip. Blot the coverslip with a laboratory wipe to remove excess liquid. Add 1 drop of anti-fade...
  12. Hassle-free 96-well Format Epitope Tagging Using Cas9 Ribonucleoprotein

    Type
    Blog Post
    ...Annu Rev Genet 32: 601-618. PubMed PMID: 9928493. 4. Liang X, Potter J, Kumar S, Ravinder N, Chesnut JD...ChIP-seq methods provide a wealth of information about how protein networks work in cells. A major bottleneck...two-part cr/tracrRNAs for CRISPR experiments (in collaboration with Integrated DNA Technologies, USA). These...commercial suppliers without investing time and labour on reagent preparation in the lab. Figure 3: csRNP-assisted...first crRNA we designed for ~250 genes, we have had about 30% tagging success, although many of these genes... When not pipetting, he can be seen daydreaming about sunny days in the UK.   References 1. Bressan RB...
  13. The CRISPR Software Matchmaker: A New Tool for Choosing the Best CRISPR Software for Your Needs

    Type
    Blog Post
    ...since its inaugural year in 2012. That’s just 3 to 4 years ago. It is a bubble of innovation (a piñata)...databases mentioned above or, even better, first-hand knowledge from laboratories employing CRISPR on ... CRISPR system was involved. Today, that same laboratory enjoys a successful edit rate of over 90% in ...targetable NGG PAM sites whereas the human genome has about 300 million. With such a sparsely targetable genome...worse by an ever increasing marketplace. Since 2013 about 11 tools have been added every year.   Breaking ...databases are still young and will require a collaborative effort from the community in order to succeed...screen shot and overview of the table can be found above). These categories are further discussed below (...
  14. Antibody Validation Using the Indirect ELISA Method

    Type
    Protocol
    ...for 2 h at room temperature or overnight at 4 °C . Section 4: Secondary antibody incubation Carefully remove... over several days by incubating certain steps at 4 °C instead of room temperature or 37 °C. The protocol...: Blocking Day 3: Primary antibody incubation Day 4: Secondary antibody incubation and plate read Tips...and incubate at 37 °C for 30 min , or overnight at 4 °C . Section 2: Block the plate Prepare the wash buffer...400 rpm for 2 h at room temperature or overnight at 4 °C . Section 3: Primary antibody incubation Carefully...400 rpm for 2 h at room temperature or overnight at 4 °C . Section 5: TMB reaction Carefully remove the ...point. If your unknown sample’s absorbance falls above the range of the standard curve you will need to...
  15. CRISPR 101: Cytosine Transversion Editors

    Type
    Blog Post
    ...core ring structure intact, allowing them to make 4 out of the possible 12 base-to-base conversions. The...still isn’t over! Keep an eye out for our next post about base editing, where we’ll tackle transversion editors...CRISPR 101: Cytosine and Adenine Base Editors Read about four base editor reporters CRISPR 101: Prime Editing...
  16. Handling Plasmids from Addgene - Purifying Plasmid DNA

    Type
    Protocol
    ...pH 8) 50 mM glucose 10 mM EDTA Store Solution I at 4°C Solution II - Denaturing Solution 0.2 N NaOH 1.0%...acetic acid 57 mL of dH 2 O Store Solution III at 4°C Grow 2 mL overnight cultures from single colonies...to the recovered aqueous DNA layer. Repeat steps 2-4. Note: Phenol-chloroform is a hazardous waste - DO...high speed (at least 12,000 rpm) for 15-30 min at 4°C. Notes: Pellet contains the precipitated DNA. Supernatant...temperature before quantifying and using. Store DNA at 4°C. Tips and FAQ Plasmid purification kits provide ... supernatant out of the tube if you are worried about losing the pellet. Dry with vacuum or by inverting...
  17. Isolating a Monoclonal Cell Population by Limiting Dilution

    Type
    Protocol
    ...Reagent Preparation DMEM Complete: 10% v/v FBS and 4 mM L-alanyl-L-glutamine (or stable alternative, such...heat-inactivated FBS and 5 mL of 100X glutaGRO. Store at 4 °C. Polyclonal stable cell pool: see our protocol ...solution. Homogenized cell solution concentration: 4 × 10 5 cells/mL To seed one 96-well plate, make 10... of homogenized cell solution needed: (50 cells)/(4 × 10 5 cells/mL) = 0.125 µL Because this is such a...Shalem O, Zhang F. Nature Methods. 2014 Aug;11(8):783-4. (Link opens in a new window) Last reviewed on: September...approximately 50–60% confluent. For 293T cells this is about 2 × 10 6 cells in a 10 cm dish. Each 10 cm dish ...cell solution into the conditioned medium prepared above to make a new cell solution at a concentration of...
  18. Lentivirus ddPCR Titration

    Type
    Protocol
    ...and transduce cells Day 4: Treat cells with Benzonase and harvest cells Day 4+: ddPCR and analysis Equipment...VIC) 1 µL 9 µL 900 nM, 250 nM Nuclease-free water 4 µL 36 µL Total Volume 16 µL 144 µL Vortex the master... collecting drops along the side of the tube. Add 4 µL of the 25 ng/µL samples to the appropriate PCR ...Extension 60 1 2 40 Enzyme Deactivation 98 10 2 1 Hold 4 ∞ 2 1 After PCR is complete, transfer the plate to...0.08366013072 6.69E+06 3 200 1620 15840 0.2045454545 8.18E+06 4 100 3180 20540 0.3096397274 6.19E+06 5 50 8960 17080...the titer. Calculations In the experimental setup above, the following virus dilutions were used to transduce...v = Virus volume, mL *In the experimental setup above, the cells per well is 300,000 and the virus volume...
  19. 27 Hot Plasmids from 2016

    Type
    Blog Post
    ...Moffat laboratory members conducted multiple screens in different human cell models and identified ~4-5-fold... the MAGE method in unmodified bacterial species (4). This set of plasmids (dubbed pORTMAGE) expresses...but be sure to let us know if you'd like to write about your plasmids in a future blog post. No time to ...pooled libraries, but thanks to a deposit from the laboratory of Dr. Ji-Long Liu at Oxford University, we are...you plan to use GMAP for your experiments, think about depositing your new plasmids with Addgene to help...and context-dependent human fitness genes, the laboratory of Jason Moffat at the University of Toronto ...This work has been published in Cell. The Moffat laboratory maintains a website for the TKO library that ...
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