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Showing: 161 - 180 of 342 results
  1. Lentivirus ddPCR Titration

    Type
    Protocol
    ...Time (min) Ramp Rate (°C/sec) # Cycles Enzyme Activation 95 10 2 1 Denaturation 94 0.5 2 40 Annealing/...concentration of each sample on a spectrophotometer. Prepare 25 ng/µL stocks of each sample. Samples can be used...tube as shown below. For 8 samples prepare enough master mix for 9 samples. Component Volume 9X Volume...constant across samples. In the RRE example below, 2-fold serial dilutions of a sample were loaded in ...ddPCR Lentivirus sample data, RPP30 positive (green) and negative (black) droplets Sample ID Plasmid ID ... higher dilutions depending on their particular sample. This protocol was modified from the publication...Starting Thaw the master mix, primers/probe mixes and samples on ice before use. Wipe down all pipettes and surfaces...
  2. Addgene's Cancer Collection Pages Connect the Research Community

    Type
    Blog Post
    ...directly, albeit weakly, to K-Ras and inhibit its activation. The next step may be to follow up on these promising...molecules that bind to K‐Ras and inhibit Sos‐mediated activation." Angewandte Chemie 124.25 (2012): 6244-6247....brake pedal that does not work. Both cases yield the same result – uncontrolled movement of the vehicle or...transcript most commonly found across all TCGA tumor samples is represented, making the results of any such ...screenshot below). Currently, the page includes interactive maps for the Ras, mTor, and p53 pathways. The...
  3. Uncovering Ancestral Bias in CRISPR Research

    Type
    Blog Post
    ...only be aware of the potential for bias but to actively look for and consider bias as a confounding factor...s imperative for scientists to be aware of and actively use tools designed to help reduce or eliminate...sequences of guides across 8 CRISPR libraries. Samples are divided into those of African ancestry(orange... on these and any other CRISPR screens using the same reference genomes and libraries. Further complicating...
  4. How to Be an Excellent Trainee

    Type
    Blog Post
    ...you up to speed easier and faster when you’re an active participant in the training. In this blog we will...assistance at some point during the procedure. Be an active partner Everyone’s learning style is different,... a saying that if the sample prep is poor, then the data will be poor. The same is true for training in...you remember where the equipment, reagents, and samples are. Do: Ask your bench mentor if they have time...
  5. Nanoblades: Tiny CRISPR Ninjas for Genome Editing Difficult Cells

    Type
    Blog Post
    ...modification with Homology Directed Repair (HDR), CRISPR activation or repression, transgenic mouse line creation...deliver Cas9 variants, such as a transcriptional activator dCas9-VPR, if these variants are fused to the ...detected in cells electroporated with RNPs using the same guide. Nanoblades also had lower off-target effects...
  6. Experimenting in an Open Source lab: from CRISPR to Cats

    Type
    Blog Post
    ...around 1,000 active makerspaces around the world. Hackerspaces.org maintains a list of active spaces near...data is freely available, and the collection of samples and sequencing is being organized and funded by...
  7. INTEGRATE: Bacterial Genome Engineering Using CRISPR-Transposons

    Type
    Blog Post
    ...nucleases (such as Cas3) or have its own nuclease activity. Instead, it forms a novel co-complex with the... (Vo et al., 2020). VchINT was also shown to be active in various gram-negative bacterial hosts of interest...seven required genes and the CRISPR RNA under the same promoter, and a donor plasmid (pDonor) encodes the...immunity, whereby multiple proximal insertions with the same transposon exhibit reduced efficiencies (Vo et al...
  8. Viral Vectors 101: Preparing Pooled Libraries

    Type
    Blog Post
    ...Genome-scale CRISPR-Cas9 knockout and transcriptional activation screening - An excellent protocol paper by the...Genome-scale CRISPR-Cas9 knockout and transcriptional activation screening. Nat Protoc. 2017 Apr;12(4):828-863...plasmids, all of which need to be represented in the same proportion after amplification as they were prior...visualization) that confirm diversity of the library sample, and any other information or scripts provided ...
  9. CRISPR Cheat Sheet

    Type
    Blog Post
    ...adenosine deaminase can convert adenosine to inosine. Activate/Repress: Modified versions of CRISPR nucleases... using the link or use the text below to get the same information. Download a PDF of CRISPR Cheat Sheet...
  10. Google Forums Round Up: First Impressions of NgAgo

    Type
    Blog Post
    ...cells and one which diminishes the endonuclease activity of the enzyme. In vivo, only nascent NgAgo protein...the cellular machinery, leaving a small amount of active NgAgo/ssDNA complex in the cell. As proposed in... to deliver NgAgo ingredients into the cell, the same method used by Gao et al, 2016 (1). View the Complete...
  11. Multicolor Animals: Using Fluorescent Proteins to Understand Single Cell Behavior

    Type
    Blog Post
    ...necessary to excise the non-fluorescent YFP and activate fluorescence of the downstream OFP, GFP, or RFP...injected transgene, each of which could recombine to activate the expression of a different fluorescent protein...cell remains the same color for its entire lifetime and daughter cells retain the same color, allowing ...3.0 and using the same fluorescent markers, Brainbow 3.1 and 3.2 (described in the same publication) are...stage, meaning that neurons of the same lineage will express the same XFP transgene in an adult fly. As... that target these epitopes and fluoresce in the same color as the fused XFP can be used to amplify the...expressing YFP, CFP, and RFP are not present at the same frequencies. The small population size of CFP++ ...
  12. Fluorescent Proteins 101: Monitoring Cell Mobility Using Fluorescent Proteins

    Type
    Blog Post
    ...proteins expressed in the specimen.  2. Fluorescence Activated Cell Sorter (FACs) A machine that sorts cells ...How do dendritic cells migrate to lymph nodes to activate T cells (Celli et al 2008, Kitano et al. 2016,...Patrolling monocytes promote intravascular neutrophil activation and glomerular injury in the acutely inflamed...depth. Two low-energy photons (typically from the same laser) cooperate to cause a higher-energy electronic...proteins. Additional fluorescent protein tools Photoactivable fluorescent proteins (proteins that fluoresce...movement by marking cells at a specific time. Photoactivable fluorescent proteins, for example, have been...must pay attention to time scale when using photoactivatable FPs - their degradation within labelled cells...
  13. Plasmids 101: Stringent Regulation of Replication

    Type
    Blog Post
    ...initiate replication, controlling the amount of active DnaA available is one of a cell’s best tools to...binding sites, or trading out ADP for ATP to re-activate DnaA. These regulatory mechanisms allow E. coli...machinery in order to replicate—but not always to the same extent. As described in our previous Origin of Replication... although ATP does get hydrolyzed over time, inactivating the protein binding it (Grimwade et al., 2018...proteins, it can be regulated indirectly via the same mechanisms that affect DnaA and IHF. RepA also controls...
  14. Golden Gate Assembly Upgrades: More Fragments, Faster Assembly, and Higher Fidelity

    Type
    Blog Post
    ...Golden Gate assembly involves the simultaneous activities of a Type IIS restriction enzyme such as BsaI...base pair substrates, it demonstrates significant activity on some mismatch-containing pairings. During Golden...confirmed the insertion of the Lambda insert at the same high frequencies as the antibiotic selection markers...
  15. Technical Design of a Western Blot

    Type
    Blog Post
    ... enzymes are cheap, fast, shelf-stable before activation, and light-insensitive. They can detect femtogram...usually preferred because of their higher specific activity, slightly lower cost, and smaller size. However...antimicrobial agents. Chemiluminescence kits When activating your enzyme, make sure to choose a chemilumescence...and your sample(s), as you can only compare samples to a standard curve generated on the same blot. If...protein expression varies from sample to sample. To compare one sample to another, you’ll need to normalize... a weak signal. However, they have high cross-reactivity, vary significantly from lot-to-lot, and have...but they have higher specificity, lower cross-reactivity, and are more consistent lot-to-lot. The highest...
  16. Genomic Deletions in Mammalian Cell Lines

    Type
    Collection
    ...efficiency, but 37 °C is acceptable. Fluorescence Activated Cell Sorting (FACS) of Transfected Cells Prepare...Run samples on 2% agarose gel at 10 V/cm using 1x Tris-acetate-EDTA (TAE) buffer. Examine samples for ...down to a smaller final volume if necessary. Run samples in a thermocycler using the following parameters...a mini-prep culture. Perform mini-prep for each sample and sequence each colony using a U6 promoter forward... the presence of intended genomic deletion. Run sample in thermocycler and run the following program: ...Numerous polymerases may be used for step 6.3 . Run samples in a thermocycler using the following parameters...to step 7.3 . Extract the gDNA from clones. Run sample in thermocycler: 65 °C for 6 min and 98 °C for ...
  17. Recombinase-based State Machines Enable Order-dependent Logic in vivo

    Type
    Blog Post
    ...control recombinase activity. For example, post-transcriptional recombinase activation via RNA toehold riboregulation...states in a sample; instead, it will suggest the predominant state of registers in a sample based on a ... use the same recognition site array on the register, and all three-input GRSMs use the same recognition...implement the same gene regulation program. We recommend testing multiple register designs for the same gene regulation...If an attB-attP pair is aligned (sites facing the same direction) on a register, then the result of their...amplify in some states but not others. Because samples of many registers will likely not be homogenous...infer the predominant state of registers within a sample using a metric that we describe in the Materials...
Showing: 161 - 180 of 342 results