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We narrowed to 419 results for: SAM-2

Showing: 141 - 160 of 419 results
  1. Antibodies 101: Introduction to Immunofluorescence

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    Blog Post
    ...counterstaining, mounting sample on slides, and confocal   Figure 2: High-level overview of an...into the several steps outlined below and in Figure 2. For a deeper dive into the steps and techniques, ...recognize the species of your primary antibody and 2) is conjugated to a fluorophore that suits your experiment...multiple proteins relate to one another in the same sample. For this strategy to work, it is important to...you use will depend on the target and sample type. Sample Preparation This step can involve multiple...target and sample type. Primary Antibody This is the first antibody applied to your sample, which will...of cells found in my tissue.” It is based on the same principles as other antibody-based assays, like ...
  2. Optogenetics + CRISPR, Using Light to Control Genome Editing

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    Blog Post
    ...the light-inducible heterodimerizing cryptochrome 2 (CRY2) and calcium and integrin-binding protein 1 ...inactive, dead Cas9 protein (dCas9) fused to CIB1; and 2) the activator - the CRY2 photolyase homology region... fused to both the N- and C-termini of dCas9; and 2) CRY2FL-VP64, a fusion of full-length CRY2 and the...researchers saw an 11-fold increase in mRNA levels after 2 hr and a 400-fold increase after 30 hr. The system...authors fragmented Cas9 into N-terminal (residues 2-713, N713) and C-terminal (residues 714-1368, C714...nMagC714 instead of nMagHigh1-C714, generating paCas9-2. This change did not significantly alter the system...prior work, the Sato lab also showed that the paCas9-2 system could be spatially controlled and reversibly...
  3. The Importance of High Titer for AAV Transductions

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    Blog Post
    ...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...possible, use low-bind or siliconized tubes to store samples as it is more difficult for viral particles to ...
  4. Quickest Way to Deposit Plasmids: The Deposit Spreadsheet

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    Blog Post
    ...our deposit spreadsheet to complete Step 1. Steps 2 and 3 are usually very easy — our tech transfer team...columns are shown in red in the spreadsheet (Figure 2) and are described in Table 1. Some cells have drop-down...Filling out and sending the deposit spreadsheet Figure 2: Example of the deposit spreadsheet showing the first...contact Addgene. We may require that you send your samples to Addgene pre-transformed in this strain. ...with instructions on how to prepare and ship the samples to Addgene and contact your technology transfer...
  5. Educational Planarian Tools for Teaching Developmental Biology Techniques

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    Blog Post
    ...neoblast cells and the gene Prohormone convertase 2 (pc2) labels the central nervous system. Evaluating... characterized in an unrelated worm (C. elegans) [2]. Delivering dsRNA matching a specific mRNA sequence...223). Link: http://abt.ucpress.edu/content/79/3/208 2. Fire, S. Xu, M.K. Montgomery, S.A. Kostas, S.E. Driver...Students can produce DNA templates via PCR off of the same plasmid and use these to create riboprobes for in...WISH protocol involves preparation of the tissue sample, several washes, and temperature changes to visualize...
  6. Hot Plasmids: Spring 2025

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    Blog Post
    ...proteoglycans composed of a protein core, 2–4 glycosaminoglycans (GAG), and are (typically) tethered to ...cell-attached recordings in primary visual cortex (V1) layer 2/3 (L2/3). B) Fluorescence from axonal boutons of neurons... generation and stable cell line creation (Figure 2). Looking for more? Explore our empty and EGFP retroviral...Lentiviral backbone plasmids here! Figure 2: Addgene cloned EGFP into pAG Lenti CMV N-HA Puro ...either the optogenetic activator channelrhodopsin-2 or fluorescent reporter dTomato under the control ...
  7. Plasmids 101: Plasmid Incompatibility

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    ...to plasmid loss (Diaz et al., 2015).  Figure 2: The partitioning problem. For low copy plasmids...of plasmid into a separate daughter cells (Figure 2) (Ebersbach et al., 2005). However, more recent studies...Plasmids. Microbiology and Molecular Biology Reviews 62(2): 434–464. Pubmed PMID: 9618448 Diaz R, Rech J, Bouet... Plasmids with the same replicon are incompatible because they compete for the same replication control...incompatibility due to having the same replication machinery. High copy plasmids with the same centromere-like binding...if they have the same centromere-like region, and the NTPases end up “walking” the same plasmids to one... when multiple plasmids within one cell have the same replicon and/or partitioning system. Let’s start...
  8. Selecting Your Plasmid Purification Kit

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    Blog Post
    ... environmental sustainability in mind (Table 2). Table 2: Sustainability features highlighted in plasmid...debris”; and then clean-up the plasmid DNA (Figure 2). For most kits, the steps for lysing cells and removing...together — no mixing and matching!   Figure 2: Plasmid isolation workflows are similar across kits... on plasmid preps, not all plasmid preps are the same. Your downstream application will dictate how much...plasmid DNA itself, which can happen if you leave the sample in a lysis buffer for too long or if you get a ...you mix specially coated magnetic beads into your sample and use magnets to isolate the beads for the wash...situation as you can simply add more beads to your sample. But, you’ll need to ensure you have an appropriate...
  9. CRISPR 101: Anti-CRISPR Proteins Switch Off CRISPR-Cas Systems

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    Blog Post
    ...base pair to another base pair at a specific site. 2. Temporal, spatial, or conditional control of CRISPR...difficult-to-engineer Sulfolobus islandicus rod-shaped virus 2 (Mayo-Muñoz et al., 2018). Only viral particles that...Editing of Sulfolobus islandicus Rod-Shaped Virus 2. Viruses 10:695 . https://doi.org/10.3390/v10120695...reducing editing from ~30% in control samples to 0-10% in Acr samples. Acr proteins can also be used to prevent...
  10. Fluorescent Tagging of Endogenous Genes with SapTrap

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    Blog Post
    ...released (Fig. 1, Step 2-3). Since donor plasmids of the same type will produce the same unique SapI 5’ overhang...digestion of the destination vector with SapI yields 2 sites- the first site accepts the sgRNA target sequence... a gRNA vector that targets the gene of interest, 2) a plasmid to specify the reading frame of the insertion...
  11. Photosensitizer Induced Cell Ablation with FAP-TAP MG-2I-dL5**

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    Blog Post
    ...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....exposure times (5 minutes vs 10 seconds) to achieve the same level of killing as Mg-2I-dL5**. Mg-2I-dL5** also...
  12. Technique: Probe Phage Genomes for Host Binding Proteins

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    Blog Post
    ... is also gaining a lot of new traction lately (1, 2), depends on knowledge of the structure(s) a given...per plate) across 20 fresh selective plates. Step 2: Express random phage DNA fragments in E. coli Now...microbiology 23.4 (2015): 185-191. PubMed PMID: 25708933. 2. Cooper, Callum J., Mohammadali Khan Mirzaei, and ... biology 34 (2015): 69-77. PubMed PMID: 26275959. 2. Weigele, Peter, and Elisabeth A. Raleigh. "Biosynthesis...at the same location that their host colonies grew. If your cells of interest stick to the same location...
  13. Fluorescent Proteins 101: Luciferases

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    Blog Post
    ...its abdomen to produce yellow-green light (Figure 2). Despite the title of this post, this reaction is...; no chemical reaction takes place. Figure 2: Simplified chemical reaction catalyzed by luciferase... has a detailed list of luciferase options. Table 2: Properties of luciferase enzymes Name Natural ...Bioluminescence Resonance Energy Transfer (BRET) works the same way, except that energy is transferred from a luminescence...
  14. Fluorescent CRISPR Reporters: SRIRACCHA and GEmCherry2

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    ...lab found that H2B-GFP expressing cells exhibited a 2-4 fold increase in the number of endogenous indel ...Denham lab made several other small changes creating 2 other versions but these did not surpass GEmCherry2...fluorescence and in-frame fluorescence.  Figure 2: The GEmCherry reporter. Image from Højland Knudsen...resistance gene followed by the target site (the same sequence you’d like to mutate in the genome) and...
  15. Troubleshooting Your Plasmid Cloning Experiment

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    ... working with is correct. It's also best to use 1-2 ug of the vector for digestion. PCR Design primers...plasmid; a starting point could be a molar ratio of 1:2 (plasmid:insert), but this parameter has to be optimized...colonies (5-10) and grow them in a small culture volume (2 or 3 ml) containing the corresponding antibiotic, ...Remember to quantify the DNA concentration of all the samples by gel or by nanodrop to assemble the  fragments...
  16. ReFigure: Save Scientific Figures into Dashboards and Share Your Insights

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    Blog Post
    ...literature? Very often the data of interest are in 1 or 2 figures from one paper and then another figure in ...ReFigure by creating ReFigures and answering this 2 minute survey! You can also find ReFigure on Twitter...another paper. A large fraction of readers cover the same ground again and again as they don’t save the insights...disease or therapeutic Side-by-side comparison of the same experiment from different cell lines/model systems...
  17. Tips for CRISPR Gene Editing in Mice

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    Blog Post
    ...groups (4; brighter than control, 3; same as control (Cetn1/sgRNA1), 2; darker than control, 1; very dark...you can hold off on genotyping until the pups are 2-4 weeks old and use the ear tag method (creating different...PMID: 24253446. PubMed Central PMCID: PMC3875854. 2. Mashiko, Daisuke, et al. "Generation of mutant mice...future.  Many thanks to our guest blogger Samantha Young. Samantha Young is a Medical Writer with a PhD in... This post was contributed by guest blogger Samantha Young. The use of CRISPR/Cas9 for gene editing has...technique, you can assess several sgRNA’s at the same time, and choose the most effective ones to increase...
  18. New and Upcoming Viral Vectors - June 2019

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    ...  AAV9, AAVrg pAAV-hSyn-DIO-mCherry 37825 AAV1, 2, 5, 8, 9 (20 µL size serotype testing) pAAV-CAG-GFP...size serotype testing) pAAV-CAG-GFP 50465 AAV1, 2, 5, rg (20 µL size serotype testing) pAAV-hSyn-EGFP...size 20 µL samples of control AAV that scientists can use for serotype testing. These samples are available...serotype testing jGCaMP7c for calcium detection PSAM4 GlyR for chemogenetic inhibition Flp expression ...localization. The Sternson lab recently deposited PSAM AAV, which encode engineered ligand-gated ion channels...Plasmid Serotype Name 119741  AAV5  AAV SYN flex PSAM4 GlyR IRES EGFP Recombinase AAV Finally, we are... Plasmid Serotype Name 119472  AAV5  AV SYN PSAM4 GlyR IRES EGFP   Biosensors Plasmid Serotype...
  19. RNA Interference in Plant Biology: New Tools for an Old Favorite

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    Blog Post
    ... analogs such as 2-fluoroadenine (2-FA), organisms with functional APT will convert 2-FA to cytotoxic ...selection of plants undergoing RNAi, and LIIbeta F 1-2 RNAi, which allows assembly of intron-spliced hpRNAs...nucleotides, resulting in death. In the presence of 2-FA, potent gene silencing of APT is required for survival...between gene silencing and knockout methods of the same gene. However, recent work has called this prevalent...
  20. Antibodies 101: Flow Cytometry Controls

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    Blog Post
    ...positive population. Figure 2: An FMO gating example. The FMO sample (A) can be used while setting ...otherwise be difficult to separate out. In Figure 2, you can see that, without the FMO, it would be difficult...It will be from the same host species, have the same Ig subclass, and be in the same fluorophore (e.g.,...controls An isotype sample is prepared very similarly to a FMO sample: you make a sample from a combined ...your samples. The single color controls should be used as a starting point, to preserve your sample, and...experiment. To make an FMO sample, you take a subset of your experimental samples, combine it into one well...controls will help you save on sample volume, so you can use most of your samples for flow analysis rather ...
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