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We narrowed to 967 results for: lat

Showing: 301 - 320 of 967 results

  1. Technical Design of a Western Blot

    Type
    Blog Post
    ...purified protein not always available Calculate relative quantification Normalizing to ubiquitously...variation. Confirmation of sequence can be done from relatively cheap plasmid sequencing. While rAbs are monoclonal...to run a western blot. It allows you to detect relatively low levels of antigen, while providing flexibility...assay design. Conjugated secondary antibodies are relatively cheap and easy to source, making it easy to switch...lower concentration of blocker, you can also use gelatin.  Protein-based blockers are inexpensive and easily...it to create a standard curve on your blot to calculate the amount in your sample. (Do ensure your blot... not available in a pure form, you can perform relative quantification, which measures protein amounts...

  2. Hot Plasmids - August 2020

    Type
    Blog Post
    ... other molecular techniques to introduce time modulation of the TEV cleavage and improve utility of the...systems at Addgene! Schematic of the evolution platform to generate TEV protease variants. Catalysis by... transcription factor to enter the nucleus and modulate transcription of the mCitrine gene. mCherry is...pMAL-T-Avi-His/BirA, a vector commonly used for in vivo biotinylation via BirA and AviTAG. pMAK contains the signal...competent E.coli (NEB) using IPTG induction. To biotinylate the nanobodies, the authors used biotin dissolved...higher concentration, and results in uniform NB biotinylation. Once induced, the NBs could be easily purified...and gene activation (CRISPRa) are great ways to modulate the expression of nearly any gene via specific...

  3. Twenty Years of Sharing: Addgene's Viral Vector Service

    Type
    Blog Post
    ...100,000 viral vector preps!   Figure 1: A) Cumulative AAV preps available in the Addgene repository...vectors that deliver GFP.   Figure 3: A) Cumulative AAV preps available at Addgene from 2016–2023...systemic capsid PHP.eB.   Figure 4: A) Cumulative AAV preps for the seven most popular serotypes.... We then added jGCaMP7 and eventually jGCaMP8, later generations of GCaMP6, to the service. While they...be a matter of timing, as jGCaMP7 was released relatively soon after GCaMP6. It could be a matter of the...Addgene launched our AAV Data Hub as a community platform for the sharing of that exact data. Here, requestors...develop new systems, new partnerships, and new platforms, from our early engagement with UPenn to our launch...

  4. Analyzing CRISPR Editing Results with ICE from Synthego

    Type
    Blog Post
    ...inferred sequences present in your edited population and their relative representation in the edited pool. The...editing - enabling a ~100-fold reduction in cost relative to NGS-based amplicon sequencing. To use the tool...guide RNA sequence you used. The ICE tool will calculate overall editing efficiency and determine the profiles...different types of edits that are present and their relative abundances.   The ICE tool also provides a Knockout... DNA from both edited and unedited (control) populations is PCR-amplified and Sanger sequenced. ICE compares...during generation of the ICE Score, the Pearson correlation coefficient (r) is also computed and reported...distribution of indel sizes in the entire edited population of genomes. Hovering over each bar of the indel...

  5. Bioinformatics at Addgene

    Type
    Blog Post
    ...have evolved over the years to keep up with the latest tools. In Addgene’s early days, we would ‘spot-...Falls sized rainbow   Over the years we have accumulated more than 300,000 individual nucleotide sequences...help us work in large formats, such as 96-well microplates, and thanks to our dedicated product and development...pipeline. After reviewing and testing several platforms for engineering pipelines, we selected Nextflow...appropriate place in our workflow without having to translate or convert programs to a uniform language.  The...running on a computer, so it safely operates in isolation, and can be easily shared with others without ...concepts and vocabulary of Nextflow so that we could translate our pipeline steps into processes and then connect...

  6. CRISPR-mediated Plant Base Editors

    Type
    Blog Post
    ... base editing platforms for plant systems.  Figure 2: Plant base editor platforms and their molecular...deaminates a target cytosine (C) into a uracil (U) base. Later the resultant U-G pair is either repaired by cellular...Transition mutation (C>T, G>A, A>G, and T>C) installation by base editors. Pathways that compete with ...editing efficiency based on the location of the ‘A’ relative to the protospacer adjacent motif (PAM). ABE7.10...edit in a stretched window ranging from 1-17 bp relative to the PAM sequence (Zong et al., 2018) (see CBE... They can, but they require other base editor platforms. Hua et al. constructed a number of plant base...editing experiments in plants Choose a base editing platform depending on the location of your target base ...

  7. Advanced Uses of Cre-lox and Flp-FRT - A Neuroscientist’s View

    Type
    Blog Post
    ...the only means to target and manipulate specific cell types (populations) within neuronal networks in ...2003). Flex vectors revolutionize neuroscience Manipulation of specific cell types in neuronal networks ...living animals. To accomplish such cell specific manipulations in vivo, FLEx vectors expressing the light activatable...Atasoy et al. 2008; Cardin et al. 2009). Ligand regulated recombinase - keeping Cre out until needed But...time point? To allow temporal control, ligand regulated Cre and FLPe recombinase have been developed. ...recombinase expression while proteins needed for later experiments (cellular tracking for instance) can..., Colin, and A Francis Stewart. 1995. “Ligand-Regulated Site-Specific Recombination.” Proc. Natl. Acad...

  8. Mesothelioma - Causes, Symptoms, and Treatment

    Type
    Blog Post
    ...causing mesothelioma many years later. While there is a dose-response relationship (the higher the exposure,...mesothelioma symptoms in their body. The average latency period (time from first asbestos exposure to the...and turned into Stage 3 or Stage 4 cancer. These later stages of a cancer diagnosis indicate, for Stage...another organ in the body. Such misdiagnosis and late discovery mean that most mesothelioma patients have...extremely poor prognosis. Together, the cause, long latency period, and rarity of mesothelioma make it different... Sadly, in many cases the cancer is diagnosed so late that these treatments do not work very well. The...drugs used to treat mesothelioma – pemetrexed and cisplatin –because it cuts off the blood supply to fast-...

  9. Plasmids 101: E. coli Strains for Protein Expression

    Type
    Blog Post
    ... restriction/methylation system. This means the strain can neither restrict nor methylate DNA. dcm: Similarly...inducible promoter systems (which will be discussed later). In addition to the basic genotypes outlined below...Similarly, strains with this mutation are unable to methylate cytosine within a particular sequence. Browse...Chloramphenicol (pRARE) Good for “universal” translation; contains 7 additional tRNAs for rare codons ...of T7 RNAP from the genome; does not restrict methylated DNA fhuA2 lacZ::T7 gene1 [lon] ompT gal sulA11...recommended as these auxillary plasmids may be isolated during the prepping process. How does inducible...flavors—pLysS and pLysE—the difference being that the latter provides tighter control of basal expression. What...

  10. Adeno-associated Viruses (AAVs) for Genome Editing

    Type
    Blog Post
    ...one AAV and a repair template in second a second AAV to deliver their repair template to mouse zygotes and...via AAV infection, gene targeting vectors with relatively short (1 kb) homology arms underwent homologous...homologous recombination with a homologous repair template. It is this application - the creation of sequence-specific...allowing a researcher to fill it with the repair template. Bok and Porteus 2017 recently showed that by ... as RNPs and delivering two halves of a repair template spread across two AAVs, it is possible sequentially...this technique, Bok and Porteus deliver a repair template that would take up ~6.5 kB if delivered in a single...technique to efficiently deliver large repair templates for applications that require large gene fusions...

  11. Treating Muscular Dystrophy with CRISPR Gene Editing

    Type
    Blog Post
    ...point mutations. In addition to upregulating HDR, NHEJ must be downregulated to prevent the introduction ...short period of time, which would prevent the accumulation of unwanted mutations over time. DMD is a good...The homology-directed repair (HDR) pathway is downregulated in mature tissues - no problem, as exon skipping... when the genome editing frequency is low, the relative abundance of exon-skipped mRNA is high, likely...ataxia telangiectasia, congenital disorder of glycosylation, and Niemann-Pick disease type C. Although the...precision editing tailored to smaller patient populations. To bring DMD CRISPR therapy closer to the clinic...challenges above and more. One chief challenge is upregulating HDR in mature tissues, as this process is necessary...

  12. New CRISPR Web Resources and #12DaysofCRISPR Recap

    Type
    Blog Post
    ...including histone acetylation by p300, histone demethylation by LSD1, cytosine methylation by DNMT3A or MQ1...HypaCas9 Day 10: Transcriptional regulation: Truncated gRNAs for Regulating Gene Expression and CRISPR 101...notice! Our newest page in the Transcriptional Regulation category already has five blue flame plasmids... MQ1, and cytosine demethylation by Tet1. RNA Targeting: This page contains Cas13 constructs for mammalian...

  13. Genetically-encoded Sparse Cell Labeling - A SPARC of Innovation

    Type
    Blog Post
    ...cells that will be labeled in a given population is directly correlated to the length of the truncated attP...subset of cells. By labeling fewer cells in a population, it’s easier to visualize individual/non-overlapping...transgenic animals are commonly used to specifically manipulate a cell type of interest in an organism, all cells...strategy results in sparse labeling of the cell population that expresses SPARC and the fraction of cells...intermediate (I), or sparse (S) labeling of the cell population. Figure 2: Dense (c), intermediate (d),...Clandinin TR (2019) SPARC: a method to genetically manipulate precise proportions of cells. bioRxiv 788679;...

  14. Fluorescent Proteins 101: Fluorescent Biosensors

    Type
    Blog Post
    ...Method Notes Quantification of a process Plate-based assays (plate reader) Detect the average amount of ...of fluorescence across a population of cells (i.e. in a plate well). Use to track a process (e.g. enzyme...often used to monitor enzymatic activity or phosphorylation over time. You can also use biosensors to follow...transcriptional activation, conformational changes, translation, and protein translocation. Targeting your biosensor...fluorescent HPLC (proteins or other molecules) Isolate or quantify cells, proteins or other molecules ...

  15. FastCloning: A Newer, Simpler Cloning Technique

    Type
    Blog Post
    ...completely digest the template DNA. Note—templates must have been isolated from methylation competent E. coli...and digest with methylation sensitive restriction enzyme DpnI to remove the templates. Digestion products...University of Connecticut. Molecular cloning is the isolation, insertion and amplification of a recombinant ...

  16. Natural or synthetic? How Addgene’s dataset reveals trends in biological innovation

    Type
    Blog Post
    ...slight or large variations depending on how closely related these species are. If a gene was moved exactly ...exactly as is from one organism to a distantly related organism, the gene may not express well because of these...reference sequence database. Through a series of simulations and machine learning, they created a classifier...instances of rare codons, sometimes intentionally modulating expression in ways we don’t quite understand ...saw that a percent sequence identity below 85% correlates with synthetic sequences. The researchers then...growing trend of sourcing genes from distantly related organisms. In 2006, less than 1% of the genes deposited...deposited at Addgene were synthetic. But nine years later, over 20% of the genes deposited that year were ...

  17. Hot Plasmids September 2018 - Optogenetics, RNA Localization, Fluorescent Protein, and Base-editing Tools

    Type
    Blog Post
    ...activity of a microtubule-associated protein to regulate cell growth dynamics Article contributed by Klaus... modified by Torsten Wittmann’s lab at UCSF to modulate cellular dynamics with light by modifying EB1.... light - a finding which opens novel ways in manipulating and studying cellular dynamics. The photoinducible... faster than any genetic or pharmacological manipulations on cells, and has potential use for a wide range...Biology 2018 Pubmed PMID 29379139. The “Riboglow” platform for visualizing RNA production and localization...cobalamin binding riboswitches used in the Riboglow platform at Addgene. Braselmann E, et al. Nature Chemical...a new imaging-based bacterial colony screening platform, Oliver Griesbeck’s lab set out to engineer a ...

  18. What the HEK?

    Type
    Blog Post
    ...on all things HEK, from the first experiments isolating the cell line all the way to modern applications...applications. What the HEK is it?   HEK cells were first isolated in the 1970s by Alex van der Eb in the Netherlands...postdoc Frank Graham’s 293rd experiment, hence the nomenclature we use today: HEK-293. The exact origin of the... the fetal tissue which HEKs were isolated from is still a mystery, but it’s currently assumed that the...-day cell line is far removed from the initial isolate, it is difficult to determine its true tissue origin... to faithfully produce these proteins and its relatively low expression of native channels.  No matter...0995fje Tan, E., et al., HEK293 Cell Line as a Platform to Produce Recombinant Proteins and Viral Vectors...

  19. Hot Plasmids - June 2020 - Barcoded CRISPR Library, Sparse Cell Labeling, Calcineurin Reporter, and DNA Staining Dye Alternative

    Type
    Blog Post
    ...subset of cells. By labeling fewer cells in a population, it’s easier to visualize individual/non-overlapping...this were labor-intensive and required using manipulations such as injection of precise titrations of AAV... of Ca2+ are high in the cell, calcineurin dephosphorylates the protein CZI, which in turn binds to calcineurin-dependent...calcineurin dynamics and can serve as a drug-screening platform to identify new antifungals that target calcineurin...activity measurements in stressed or aging cell populations. Figure 3: Micrographs of wild type (...al., 2019. Looking for an alternative to intercalating fluorescent dyes for DNA-protein interaction...tTALE-eGFP and tTALE-mCherry. In comparison to intercalating fluorescent dyes which can cause photo-induced...

  20. Fluorescent Biosensors for Measuring Autophagic Flux

    Type
    Blog Post
    ...comprised of two tandem fluorescent proteins: a relatively pH-insensitive RFP variant, DsRed.T3, that’s ...the cytosol, this ratio is low; but when Keima accumulates in autolysosomes, this ratio is high. When untargeted...biosensor contains mRFP and GFP fused to the autophagy-related microtubule-associated proteins 1A/1B light chain...quenched in acidic environments, while mRFP is relatively stable and fluorescences even at the acidic pH...mRFP-GFP-LC3 Tandem Fluorescent Protein, but following translation, this fusion protein is cleaved to generate one... GFP/RFP ratio: a decrease in GFP fluorescence relative to RFP fluorescence suggests an increase in autophagic...autophagic flux, while an increase in GFP fluorescence relative to RFP fluorescence suggests a decrease in autophagic...
Showing: 301 - 320 of 967 results