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Showing: 201 - 220 of 657 results
  1. Important Considerations in Optogenetics Behavioral Experiments

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    Blog Post
    ... will repeatedly nose-poke at the active hole [1, 2].    Place preference/place aversion also models reinforcement...spend most of its times in the opposite chamber) [2]. Laser activation is usually controlled automatically...two different ways 1) your hypothesis is wrong or 2) there is some problem with the technical implementation...PMID: 21716290. Pubmed Central PMCID: PMC3775282. 2. McDevitt, Ross A., et al. "Serotonergic versus nonserotonergic...EthoVision. Consult the literature to find all the applications of optogenetics relevant to your field. Ultimately...Inhibition of neuronal activation is a little more complicated since basal neuronal activity in your brain region...technology is improving and may one day reach the sophistication of mouse transgenics. Everything that has been...
  2. Advanced Uses of Cre-lox and Flp-FRT - A Neuroscientist’s View

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    ...FLP and Cre for additional control   Figure 2: Expression of a morphological marker (eYFP) and synaptic...Sternson. 2008. “A FLEX Switch Targets Channelrhodopsin-2 to Multiple Cell Types for Imaging and Long-Range ...PMID: 18614669. PubMed Central PMCID: PMC2593125. 2. Buchholz, F, P O Angrand, and A. Francis Stewart....The FLP Recombinase of the Saccharomyces Cerevisiae 2 Micron Plasmid Attaches Covalently to DNA via a Phosphotyrosyl... gives you a single level of control without modification - either Cre is there or it’s not. Cre-mediated... sites can lead to excision, inversion, and translocation of DNA in a similar fashion as between loxP ...37 °C). Smart molecular evolution led to the identification of FLPe which has a temperature optimum of ...
  3. How Dry Ice Affects Viral Vector Sample pH & How to Avoid It

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    ... thaw (Fig. 2). Before thawing, all the samples were at the control pH of 7.4 as indicated by color (data...showed that AAV infectivity was not altered by a short 2-hour exposure to pH as low as 2.5 (Potter et al., ...Methods. 2013 Apr;10(4):278-9. PubMed PMID: 23538862. 2. Potter M, Lins B, Mietzsch M, Heilbronn R, Van Vliet...improve our shipment processes. After reading a publication describing how short term storage on dry ice ...medium, which is buffered and contains the pH indicator phenol red. We froze samples in a -80°C freezer...closed dry ice storage container for 48 hours (to replicate how our viruses are shipped), where they would...exposed to CO2/dry ice. All samples were tested in duplicate. What we found Not all tubes (or rather, not ...
  4. Easing the Protein Purification Process with pCri

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    ...PMID: 25386923. PubMed Central PMCID: PMC4227841. 2. Young, Carissa L., Zachary T. Britton, and Anne S. ...protein purification. For a more thorough introduction to pCri, please see the original publication cited...expression and purification: a comprehensive review of affinity tags and microbial applications." Biotechnology... Protein purification can be one of the most stressful lab activities. Working with proteins requires...interest can save a lot of time later. Protein purification specialists recommend doing some research, notably...Gomis-Rüth, aims to take the guesswork out of protein purification through simple and efficient multiplexing. pCri...sites should one need to remove the tag post-purification. A sample of pCri constructs: pCri-1a, -4a ...
  5. Starter Guide to induced Pluripotent Stem Cells (iPSCs) Part 2:  Reprogramming and Transdifferentiation

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    Blog Post
    ...revert back to a pluripotent stage (iPSC formation) [2, 3]. The iPSCs then proliferate and redifferentiate... more common delivery methods include retrovirus [2], lentivirus [4], adenovirus [5], Sendai virus [6]...2006. 441(7097): p. 1061-7. PubMed PMID: 16810240. 2. Takahashi, K., et al., Induction of pluripotent stem... Pluripotent Stem Cells. Cell Stem Cell, 2015. 17(2): p. 178-94. PubMed PMID: 26189426. 15. Si-Tayeb, ...induced pluripotent stem cells. Stem Cell Rev, 2015. 11(2): p. 242-53. PubMed PMID: 25578634. PubMed Central... to regeneration. Nat Rev Mol Cell Biol, 2011. 12(2): p. 79-89. PubMed PMID: 21252997. 37. Merrell, A....joined Cell Press to pursue a career in science communication and publishing after completing her postdoctoral...
  6. The Importance of High Titer for AAV Transductions

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    ...drastically with lower titers. As you can see in figure 2, the expression from the 5x1011 titer was essentially... roughly 6-fold increase in expression [3, Figure 2]. Note how expression increases exponentially with...international 61.1 (2002): S9-S15. PubMed PMID: 11841606. 2. Schultz BR, Chamberlain JS. Recombinant Adeno-associated... Protocols for Work with Virus Watch Our AAV Purification Video ...
  7. Retrograde AAV viral preps

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    ...sensor Jonathan Ting 83899 pAAV-mDlx-GCaMP6f-Fishell-2 mDlx GCaMP6f expression under the control of the mDlx...the functional catagories listed below. Narrow down the items available within a category by using the ...experiments can be found on the material pages for viral catalog items. Browse Available Retrograde AAV See our ... Tools Clear Filters ID Name Promoter Activity Category PI 37825 AAV-CAG-GFP CAG GFP Control Edward Boyden...offers you even more options. Select from a vast catalog of eligible AAV plasmids and we’ll make the viral...
  8. Fluorescent Proteins 101: Luciferases

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    Blog Post
    ...pyralis, catalyzes a chemical reaction in its abdomen to produce yellow-green light (Figure 2). Despite...reaction takes place. Figure 2: Simplified chemical reaction catalyzed by luciferase, releasing light... has a detailed list of luciferase options. Table 2: Properties of luciferase enzymes Name Natural ...NanoBiT, are expressed in two subunits and only catalyze a luminescent reaction when they come together...
  9. Photosensitizer Induced Cell Ablation with FAP-TAP MG-2I-dL5**

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    ...fluorogen activating protein - dL5** in this case), and 2) a fluorogen (the TAP - targeted and activated photosensitizer...cells present 96 hours post treatment (see figure 2). Induced cell death was confirmed by TUNEL staining...PMID: 26808669. PubMed Central PMCID: PMC4916159. 2. Jacobson, K., Rajfur, Z., Vitriol, E., & Hahn, K....generation when bound by the dL5** FAP.  The iodine-modifications also shift MG-2I’s excitation wavelength to ...FAP-TAP system works. Find the Plasmids from the Publication Here Light-induced cell ablation with MG-2I-dL5...
  10. Quick Guide to Working with Drosophila Part 3: Genome Engineering in Flies

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    ...are many docking sites available for integration. 2. How soon would you like your flies ready for use?...beautiful immunofluorescent images like in this paper (2). Metabolic assays such as Seahorse can be employed...PMID: 16547094. PubMed Central PMCID: PMC1526508. 2. H. Jiang,  et al. Cytokine/Jak/Stat signaling mediates...beforehand on which chromosome your docking site is located). This amounts to a small difference of two or ...throughout the lifespan of the fly to determine the implications of your genetic manipulations. You can produce...
  11. Live and Let Dye: Self-Labeling Protein Tags

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    Blog Post
    ...fluorescent protein) enables applications like multi-color imaging (Figure 2). If you’re working with purified...super-resolution or single-molecule techniques.   Figure 2: Two-color super-resolution imaging of ER and mitochondria...stimulated emission depletion (STED) nanoscopy. Scale bar, 2 μm. Inset shows comparison with standard confocal ...Labeling in Living Cells. Chemistry & Biology, 15(2), 128–136. https://doi.org/10.1016/j.chembiol.2008.01.007...conjugates: A flexible chemical tag. Nature Methods, 2(4), Article 4. https://doi.org/10.1038/nmeth749  Strebinger...Few Complicated Non-natural amino acids 1 Various Many Complicated   Applications Organic...new green fluorescent protein, some affinity purification tags, another version with that same red fluorescent...
  12. Antibodies 101: Flow Cytometry

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    Blog Post
    ...termed fluorescence activated cell sorting or FACS (2). By analyzing single cells instead of the population...expression. A routine flow cytometry experiment uses 2 or 3 different fluorescent colors each measuring a...distinct populations on a FSC versus SSC plot (Figure 2).  A user can then “gate” around the specific population...cell and T cell into distinct populations (Figure 2). An immunologist who studies B cells, might then ... B cells, plasma cells or others.   Figure 2: Due to differences in their size and complexity, ... it passes through and scatters in different directions. The degree of scatter is captured by detectors...Light that scatters sideways to the path that it was initially traveling is called side scatter (SSC) and...
  13. 5 Steps to Writing Grant Proposals for Grad Students

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    ... that universities require application submission in-house approximately 2 weeks before the RFA due date...requested in the call. Step 2: Develop a research plan Most grant applications restrict the space available...proposal typically lists the deliverables, explains 1-2 potential pitfalls of the intended protocol, and offers...the grant application process. When my PhD advisor first asked me to write a grant application due the ...in a previously funded grant application to see how funds were allocated. Step 3: Get feedback from your...the next round of applications. Step 5: Keep writing! Each written grant application builds upon the ... project grant application" by the NIH Still want more information on the application process? What types...
  14. Viral Vectors 101: Inverted Terminal Repeats

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    ...ITR, which can either be “flip” or “flop” (Figure 2). Additionally, the ITR contains a 4-nucleotide Rep...site for Rep proteins (Savvy et al. 2013). Figure 2: AAV2 wild type ITR in flip and flop orientation. ...Packaging, and Potency of AAV Vectors. Microorganisms, 12(2), 310. https://doi.org/10.3390/microorganisms1202031038399714... ITRs serve as the origin of replication and are required for replication, packaging, and vector persistence...viral rep (replication) and cap (capsid) proteins, which bind to the ITRs and initiate replication. ITRs are...structures, ITRs are prone to replication errors and disruptive mutations and truncations that can make vector ...binding site for Rep78 and Rep68 to initiate replication and a terminal resolution site that serves as...
  15. Viral Vectors 101: Calcium Sensors

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    ...2021 Aug 1;169:2-8. Suzuki J, Kanemaru K, Iino M. Genetically encoded fluorescent indicators for organellar...calcium biosensor, so that the (1) binding of calcium, (2) allosteric rearrangements of the sensor, and (3) ...user-controlled illumination with violet light and (2) exposure to increased intracellular calcium. It has... a calcium sensor Genetically encoded calcium indicators (GECIs) are fluorescent proteins linked to calcium...in living cells and organisms. Unlike chemical indicators, these DNA constructs can be delivered to intact...the sensors discussed below fall into this GECI category.   For calcium sensors, one size doesn...:509-18. Inoue M. Genetically encoded calcium indicators to probe complex brain circuit dynamics in vivo...
  16. Hot Plasmids April 2018 - Protein Degradation, Nanoscopy, FIRE-Cas9, and Yeast Expression Tools

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    ...difficult-to-manipulate primary cells, achieving knockdown within 1-2 hr of reagent delivery. TRIM-Away is suitable for ...factor 1 controls expression of transcription factor 2, which directly controls expression of a reporter ...modulating the induction of transcription factors 1 and 2. See Aranda-Díaz et al. for more information. The ...changes in expression of TRIM21-associated genes, indicating that TRIM21 overexpression does not aberrantly...light microscopy, comes from his recent Nature Communications article “SRpHi ratiometric pH biosensors for...250 nm), and studying endocytosis is further complicated by the reliance on pH-based biosensors used to...the Hell lab designed their super-resolution pH indicators (SRpHi) biosensors to meet all of them. These...
  17. Enhancing CRISPR Targeting Specificity with eSpCas9, SpCas9-HF1, & HypaCas9

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    ...PMID: 26628643. Find plasmids from this publication at Addgene. 2. Nishimasu, Hiroshi, et al. "Crystal ... (2,3). Stable strand separation is maintained by 2 sets of interactions : 1. Interactions between the...formed by the Cas9 HNH and RuvC nuclease domains 2. Interactions between the target strand and the gRNA...As evidenced by all the CRISPR publications, press, and plasmids out there, it’s obvious that CRISPR ...nickase variant, lowering Cas9 expression, and truncating gRNA sequences used for targeting; however, these...on-target and off-target activity at multiple genomic locations in HEK cells. Further testing of two of the mutants...PubMed PMID: 26735016. Find plasmids from this publication at Addgene. 5. Chen, JS, et al. "Enhanced proofreading...
  18. Using Phosphoserine to Study Protein Phosphorylation

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    ...phosphorylation events in the proteomes of higher mammals (2). How can we begin to understand the importance of... the open reading frame (ORF) of interest (Figure 2). 1. The phosphoserine OTS The backbone of the phosphoserine...optimized Sep-OTSλ and can recommend its use (6).  2. C321, a specialized bacterial host strain for pSer-incorporation...biology4.5 (2002): E127-E130. PubMed PMID: 11988757. 2. Hornbeck, Peter V., et al. "PhosphoSitePlus, 2014...most inclusive databases of post-translational modifications, identifies a staggering ~250,000 phosphorylation...steric and charge-based nature of the phosphoryl-modification; they are both much smaller, and carry only ...thus cannot reflect the true state of protein modification within the context of its appropriate regulation...
  19. Plasmids 101: CcdB - The Toxic Key to Efficient Cloning

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    ...CcdB.” Biotechniques. 1996 Aug;21(2):320-3. PubMed PMID: 8862819. 2. Bahassi, EM., et al. “F plasmid CcdB... desired insert should not grow.   Figure 2: Image from http://teachline.ls.huji.ac.il/72682/tutorials...time-consuming aspects of traditional cloning is the identification of clones that actually contain your insert...technology. CcdB: A potent toxin... The ccdB gene, located on the F sex factor plasmid of E. coli, is part...enzyme-mediated disruption of ccdB, leading to positive identification of desired clones.   ...Becomes a powerful...which can then be used for downstream cloning applications. While these two strains ultimately perform ...
  20. The Future of Research Symposium Boston 2015

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    ...Quotes taken directly from participants (summarized in 2) touched upon many problems in this area: “ [The] ...PMID: 24733905. Pubmed Central PMCID: PMC4000813. 2. McDowell, Gary S., et al. "Shaping the Future of ...A fair deal for PhD students and postdocs." Elife 2 (2013): e01139. Pubmed PMID: 24137543. Pubmed Central...University of Massachusetts Medical School. Graduate education programs are also beginning to address these issues...The panel discussion on Friday morning will be dedicated to Academic data and the Labor Market. On this...Sinche is a STEM career counselor, Director of Education for the Jackson Laboratory for Genomic Medicine...disease.  Outside the lab, he is interested in communicating science and in the intersection between science...
Showing: 201 - 220 of 657 results