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We narrowed to 20 results for: ires-cre/1000

Showing: 1 - 20 of 20 results
  1. The Power Behind NGS Plasmid Validation: seqWell

    Type
    Blog Post
    Published
    April 19, 2017, 3:25 p.m.
    ...barcodes. Rather than continuing to process 100s to 1000s of samples individually, plexWell™ reduces every...advances in technologies that permit large-scale creation and synthesis (“writing”) of longer pieces of ...limited by costly library prep, as each sample requires an individual library. The plexWell™ workflow ...samples from several plates are pooled together to create a single library containing fragments carrying ...
  2. Antibodies 101: ChIP

    Type
    Blog Post
    Published
    March 10, 2022, 3:25 p.m.
    ...pieces of roughly equal size, typically between 200-1000 bp. This is to ensure that your downstream analysis...could mean needing to increase crosslinking to counteract the effects of increased sample agitation; a ...such as qPCR or next-gen sequencing. ChIP is an incredibly useful application for exploring these interactions...crosslinking, which uses formaldehyde or UV light to create strong but reversible bonds. This will keep the... necessary for most ChIP experiences, but the increased binding can mask the epitopes antibodies recognize...provides a truly random digestion, but is harsher and requires more optimization. Enzymatic digestion, while ...shorter sonication time could be an opportunity to decrease crosslinking. (Homogenization for a tissue sample...
  3. Visualizing Protein Turnover In Situ

    Type
    Blog Post
    Published
    Jan. 16, 2018, 3:20 p.m.
    ...proximity ligation." Nature methods 3.12 (2006): 995-1000. PubMed PMID: 17072308.  4. Dieck, Tom, et al. "...neurodegeneration. The level of this protein is decreased in Alzheimer’s disease patient’s brains. However... of radioactive materials is highly regulated, requires designated work areas and come with health risks...
  4. Tips for Titering Your Lentiviral Preps

    Type
    Blog Post
    Published
    March 15, 2016, 2:30 p.m.
    ...particles. Studies have found that values can be 10-1000 fold higher than for functional assays depending.... Developing the proper control line typically requires transducing with a limiting multiplicity of infection... How Lentivirus is Used in CRISPR Genome-Wide Screening Learn How Lentivirus Has Been Used for Lineage...
  5. Plasmids 101: The Promoter Region – Let's Go!

    Type
    Blog Post
    Published
    April 3, 2014, 8:05 p.m.
    ... (response elements). Promoters are about 100 to 1000 base pairs long and found upstream of their target...interest is toxic. To combat this, scientists have created synthetic promoters, which typically include some...binding sites, commonly used in Drosophila Specific Requires the presence of Gal4 gene to activate promoter...Promoter from T7 bacteriophage Constitutive, but requires T7 RNA polymerase. When used for in vitro transcription... Negligible basal expression when not induced. Requires T7 RNA polymerase, which is also controlled by...Promoter from Sp6 bacteriophage Constitutive, but requires SP6 RNA polymerase. SP6 polymerase has a high ...with somewhat weak expression. lacIq mutation increases expression of the repressor 10x, thus tightening...
  6. Which Fluorescent Protein Should I Use?

    Type
    Blog Post
    Published
    May 20, 2014, 2:06 p.m.
    ...coefficient and quantum yield of the protein, divided by 1000. In many cases the brightness is compared to that...many FPs (particularly those derived from GFP) requires oxygen. Therefore, these FPs cannot be used in... the time it takes the FP to correctly fold and create the chromophore. This can be from a few minutes...
  7. Overcoming the AAV Size Limitation for CRISPR Delivery

    Type
    Blog Post
    Published
    Sept. 16, 2020, 1 p.m.
    ...includes SpCas9, and shortern orthologs approximately 1000 amino acids in size. From the pool of shorter orthologs...and multiple gRNAs into separate AAV vectors, increasing overall packaging capacity but necessitating ...drawbacks limit the utility of these systems: St1Cas9 requires a very specific PAM sequence that limits the number...efficiency of AAV-SaCas9 in vivo, the Zhang lab created an all-in-one SaCas9 and sgRNA construct using ...histologically normal and liver injury markers were not increased compared to a control AAV-GFP. Not only did the...
  8. Fluorescent Proteins 101: Photoactivatable Fluorescent Proteins

    Type
    Blog Post
    Published
    April 25, 2017, 2:30 p.m.
    ...Low 572/ 610 FP595 Tetramer Green Dark/ Red 70 - 1000 Medium 590/ 600   Choosing a photoactivatable...photoconverts predominantly to the anionic form, causing increased fluorescence when excited with 488nm blue light...which allows PA-GFP to exhibit up to a 100-fold increase in fluorescence when illuminated with blue light...performing several rounds of random mutagenesis screening for enhanced RFP variants. PA-mCherry (E26V / ...one since the formation of mEosFP’s chromophore requires a temperature below 30°C and this is not ideal...photoswitching. In 2008, scientists used mutagenesis screens to find a version of Dronpa that doesn't become...the absence of photoactivation resulting in an increased signal to noise ratio. PA-FPs with higher contrast...
  9. CRISPR 101: Multiplex Expression of gRNAs

    Type
    Blog Post
    Published
    Sept. 10, 2020, 11:45 a.m.
    ... E. coli.” ACS Synthetic Biology 4(9) (2015):987-1000. PubMed PMID: 25822415. Find plasmids from this...plasmid contains all of the desired gRNAs. This increases the chance that all the edits you want to make... cleave outside of their recognition sequence, creating flanking overhangs. These overhangs can be customized...Expression Systems (MuLE) Kit: This kit can be used to create lentiviral vectors expressing wt humanized Cas9...the gRNAs. gRNAs are flanked by glycine tRNAs to create polycistronic glycine tRNA-gRNA (PTG) constructs...using 3 distinct spacer-repeats, you could easily create 7 unique arrays (e.g. for spacers A, B, and C, ...is possible with efficiency >70%. CRMAGE is an incredibly fast protocol, with only 5 hours incubation time...
  10. Popular Retroviral Vectors and Their Uses in Scientific Research

    Type
    Blog Post
    Published
    July 24, 2018, 12:51 p.m.
    ... Mammalian shRNA Tools for RNAi! Cre-Lox technology CAG-GFP-IRES-CRE (Plasmid #48201) This retroviral ...vector from the Gage lab encodes GFP and Cre-recombinase. The Cre-lox system is a technology that can be...the pLKO.1 vector can be found here. Cre-Lox technology Puro.Cre empty vector (Plasmid #17408)   This ...of mouse transgenics. Experimental uses include: Cre-dependent gene expression, gene knockout, and selection... vector deposited by Dr. Tyler Jacks. It carries CRE recombinase and a puromycin resistance cassette. ...shRNA), mutation/editing (CRISPR-Cas9) or deletion (Cre), together with expression of fluorescent or enzymatic...CRISPR pooled libraries that allow functional screening of thousands of genes in genome-wide experiments...
  11. 27 Hot Plasmids from 2016

    Type
    Blog Post
    Published
    Dec. 22, 2016, 3:03 p.m.
    ...loxP-stop-loxP cassette into the Rosa26 locus, allowing for Cre-dependent expression of a GMAP inserted gene. The...produces point mutations at a rate of up to 1 per 500-1000 bp. In comparison, the DNA replication error rate...of a good screening experiment can be found on our blog post entitled “Genome-wide Screening Using CRISPR...Receptor-ome Expression and Screening via Transcriptional Output-TANGO (PRESTO-TANGO) to screen the NCC-1 library...and later create stable cell lines expressing it. The Church lab fixed this issue by creating a new dCas9...  CRISPR pooled libraries enable researchers to screen the entire genome for genes that regulate a wide...CRISPR knockout library and used this library to screen for genes involved in West Nile Virus (WNV) induced...
  12. Dos & Don'ts When Publishing a Scientific Manuscript

    Type
    Blog Post
    Published
    May 22, 2014, 4:02 p.m.
    ...Maaike Pols, PhD, a Developmental Editor at F1000Research.  With many changes taking place in the world...world of science publishing, and an ever increasing number of journals and publishers to choose from, it... paper for publication in a scientific journal requires several considerations. First, it is important...them needing a subscription to the journal. An increasing number of funding bodies insist that the research...your Addgene plasmid #), and other reagents. F1000Research, among many other journals, has joined a pilot...results more valuable. Some journals, including F1000Research, also ask for the raw data behind the figures...several rounds of revision before acceptance. F1000Research uses a novel form of peer review that occurs...
  13. Antibody Validation for Flow Cytometry

    Type
    Blog Post
    Published
    Sept. 10, 2024, 1:15 p.m.
    ...and flow cytometry. F1000Research, 13, 817. https://doi.org/10.12688/f1000research.154034.1 Laflamme, ...antigen of interest in the given protocol. This requires use of one of the five pillars of antibody validation...validation, and it is recommended to screen multiple candidate antibodies when possible. If cost is prohibitive...synaptotagmin 1 page. The data produced is available on the F1000 gateway and Zenodo community.  Knockdown approach...interest. By correlating your data sets, you can increase confidence that the labeling observed represents...experiment. We find it useful to start with a screening procedure in easily genetically modified cell ...
  14. Plasmids 101: NGS Quality Control for Pooled Libraries

    Type
    Blog Post
    Published
    Oct. 26, 2017, 1:59 p.m.
    ...primers to create 200-300 bp sequencing products using PCR. A diagram of the product we created for the ...you want to have 100x-1000x coverage of your library: in other words, 100-1000x more reads than number...plasmid. However, lots of library DNA is needed for screening experiments, so the scale of the DNA prep is larger...rank the plasmids by abundance, scaled to 1, to create a “cumulative wealth distribution” curve, or Lorenz...a powerful research tool, but their proper use requires careful amplification and maintenance of good ...wishes you luck in your future library use and screening, and if you have any tips, input, or stories of...
  15. Viral Vectors 101: Systemic Capsids

    Type
    Blog Post
    Published
    Oct. 12, 2023, 1:15 p.m.
    ...Systemic capsids packaging Cre-dependent transgenes can also be paired with Cre-expressing transgenic mouse...with appropriate cell type-specific promoters or Cre lines. Spatial transcriptomics suggests that AAV-...Huber, N., Pasca, S. P., & Gradinaru, V. (2016). Cre-dependent selection yields AAV variants for widespread...Deverman, B. E., & Gradinaru, V. (2020). Multiplexed Cre-dependent selection yields systemic AAVs for targeting...have developed techniques like CREATE (Deverman et al., 2016), M-CREATE (Ravindra Kumar et al., 2020),...Research in Neurobiology, 4, 100086. https://doi.org/10.1016/j.crneur.2023.100086. Challis, R. C., Ravindra...
  16. Degrading DNA with Cascade-Cas3

    Type
    Blog Post
    Published
    Feb. 11, 2025, 2:15 p.m.
    ...and Genome Editing, 3–4, 100013. https://doi.org/10.1016/j.ggedit.2022.100013 O’Brien, R. E., Bravo, J...part of the Class 1 CRISPR family, which means it requires multiple Cas effectors to carry out genomic editing...different compositions of the Cascade complex. Created with BioRender.com.   The Cascade complex Cascade...Figure 2: Cascade complex from CRISPR type I-E. Created with BioRender.com. Thanks to this complex,...Tomoji Mashimo lab and the Tilmann Weber lab — to increase efficiency of these systems, though consistent...General overview of the Cascade-Cas3 mechanism. Created with BioRender.com.   The reeling mechanism...unwinding of dsDNA occur simultaneously, which creates a loop in the target strand that is cut occasionally...
  17. Fluorescent Proteins 101: Monitoring Cell Mobility Using Fluorescent Proteins

    Type
    Blog Post
    Published
    Aug. 15, 2017, 1:24 p.m.
    ...useful tool for marking and tracking cells is the the Cre/lox recombination system. A researcher can flank ...expression is turned on or off in cells expressing Cre. The result of a system like this is a mosaic of ...respectively. The permanent labelling of cells using cre-lox is advantageous when compared to photoactivable... In the past 15 years efforts have been made to create transgenic mice expressing fluorescent protein ...auto-fluorescence (Drobizhev et al. 2011). But this requires other lasers than the standard Ti:Sapphire laser...wavelength as it has been shown that even a small incremental change of the excitation wavelength can significantly...called Brainbow, the Ubow mouse strain has been created to fate map Langerhans cells and follicular dendritic...
  18. Typing CRISPR Systems

    Type
    Blog Post
    Published
    March 18, 2025, 1:15 p.m.
    ...breaks caused by Cas12 create short 3’ overhangs, which leads to slightly increased efficiency when conducting...and Genome Editing, 3–4, 100013. https://doi.org/10.1016/j.ggedit.2022.100013 Additional resources on ...systems has led to extreme sequence divergence that requires a multi-pronged analysis to sort effectively. ...type to subtype to variant (shown in italics). Created with BioRender.com.   Class 1 versus class ...underutilized compared to Class 2. Class 1 Despite their incredible abundance, Class 1 CRISPR systems are less popular...Cascade. As you might imagine, this is handy for creating large genomic deletions. Type I systems are also...with Cas3 (pink). Complex shown is from type I-E. Created with BioRender.com.   Type III Type III is ...
  19. Proximity Labeling: A Powerful Tool for Protein Complex Purification and Proteomic Mapping

    Type
    Blog Post
    Published
    Dec. 2, 2019, 2 p.m.
    ... ligase The Roux Lab in 2016 optimized BioID to create BioID2, a smaller and improved promiscuous biotin..., BioID2 exhibits enhanced proximal labelling, requires less biotin, and allows scientists to more selectively...was its low sensitivity. Sensitivity could be increased with higher expression levels but for many fusion...until they identified a mutant with significantly increased sensitivity that did not affect the function or...miniTurbo were developed in the Ting Lab in 2018 to increase the speed of proximity labeling by promiscuous...APEX2, although it can rapidly label proteins, requires H2O2 which can be toxic to living cells. To circumvent... BASU exhibits 1,000 fold faster kinetics and increases the signal to noise ratio 30-fold compared to ...
  20. Plasmids 101: Gateway Cloning

    Type
    Blog Post
    Published
    Jan. 12, 2017, 3:30 p.m.
    ...reactions. The BP reaction creates an attL-flanked entry clone. The LR reaction creates an expression clone ...entry clone and destination vector creates two products: the desires expression clone and a byproduct containing...reactions. Recombination of attP and attB sites creates attL and attR sites.   Gateway vectors contain...Gateway plasmids.    Figure 3: Method A to create an entry clone: recombination of an attB-flanked...attL-containing entry vector.   Figure 4: Method B to create an entry clone: TOPO cloning the insert into an...attL-containing entry vector.   Figure 5: Method C to create an entry clone: Restriction cloning the inset into...vector will recombine with the attL-entry clone to create the expression clone.    Figure 6: Generating...
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