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We narrowed to 61 results for: eukaryotic cell

Showing: 21 - 40 of 61 results
  1. Quick Guide to Near-Infrared Fluorescent Proteins

    Type
    Blog Post
    Published
    Oct. 5, 2021, 1:15 p.m.
    ...mammalian cells. dDetermined as effective NIR fluorescence in transiently transfected live HeLa cells with ...Near-Infrared Fluorescent Proteins in Mammalian Cells. Cell Chem Biol 24, 758-766 e753 (2017). Baloban, M...probe developers and users, BV is present in eukaryotic cells as an intermediate of heme metabolism (Shemetov...to GFP-like probes by supplying a single gene to cells. Still in bacteria, which do not produce BV, an ... to consider effective brightness of NIR FPs in cells, in addition to their molecular brightness (a product...the concentration of BV-containing molecules in a cell and depends on the efficiency of BV incorporation...Photo-stabilityc, t1/2, s pKa Brightness in HeLa cells vs. iRFP713, % d Ref BphP-based FPs miRFP670...
  2. Mycoplasma Contamination: Where Does It Come From and How to Prevent It

    Type
    Blog Post
    Published
    Oct. 8, 2020, 1:15 p.m.
    ...mycoplasma contamination in your cell culture or you are about to begin a new cell culture project. If mycoplasmas...present in most of the cell culture facilities, tissue culture labs and every cell culturist has to deal...cost-effective (Sung, 2006). The sensor cell-based method uses specialized cells that can detect the presence of... should be made available for cell culturing and maintenance of the cell lines. Providing such an environment...Photo by Kate Harten DeMaio. Cell lines and reagents Examine your cell line stock for mycoplasma contamination...cryopreserved vials of the cell lines even though the viability of cryopreserved cells decreases with every ...cause mycoplasma infection from one cell line to another. Multiple cell lines should not be stored in a single...
  3. Isolating Genomic Regions of Interest with the CRISPR System

    Type
    Blog Post
    Published
    May 30, 2019, 12:44 p.m.
    ...used. The Fujii lab demonstrated this in mammalian cells by expressing dCas9 with an N-terminal 3xFLAG tag...studies (Fujita et al., 2018). In addition to the "in cell" form of this method, in which an engineered DNA-binding...molecule such as the CRISPR complex is expressed in cells to be analyzed, the Fujii lab also developed another...recombinant CRISPR ribonucleoproteins." Genes to Cells 21.4 (2016): 370-377. PubMed PMID: 26848818. Fujita...‐dC as9 protein for enCh IP analysis." Genes to cells 23.4 (2018): 318-325. PubMed PMID: 29480524. Gilbert...RNA-guided regulation of transcription in eukaryotes." Cell 154.2 (2013): 442-451. PubMed PMID: 23849981...of chromatin interactions by biotinylated dCas9." Cell 170.5 (2017): 1028-1043. PubMed PMID: 28841410. ...
  4. Production of Virus in Insect Versus Mammalian Cells

    Type
    Blog Post
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    Nov. 5, 2024, 8:32 p.m.
    ...that already do mammalian cell culture. HEK-293T cells are the most common cells used in viral production...versus insect cells for viral production Consideration Mammalian cells Insect cells Viruses AAV ...type of cells that will be used to make the virus. Viruses can be produced in many different cell types,...produced in bacteria cells. However, some viruses can be produced in multiple different cell types, including...you make an informed decision. Mammalian cells Mammalian cells are a great option for viral production,...production in mammalian cells is relatively quick. After transfection, HEK-293T cells start producing virus...using qPCR or digital droplet PCR. Insect cells Insect cells are a less common option for the generation...
  5. 28 Hot Plasmid Technologies from 2015

    Type
    Blog Post
    Published
    Dec. 23, 2015, 3:30 p.m.
    ...in live cells is that one can now follow movement of two or more targeted loci during the cell cycle or...mammalian cells, yeast, and Drosophila. Synchronization of secretory protein traffic in mammalian cells The... different organelles, a cell cycle indicator for mouse embryonic stem cells and a series of inducible...populations within the same cell. Mitochondrial fusion is typically assayed in living cells by using mitochondrially-targeted... alternative splicing in mammalian cells. Younis, et al. Mol Cell Biol. 2010 Apr;30(7):1718-28. New...yeast cell viability, had less of an effect on GFP diffusion, properly localized in mammalian cells without...fluorescent fusion proteins can visualize: Cell Structure Plasmids: Cell Structure Plasmids: ER mCherry-Sec61...
  6. Plasmids 101: Terminators and PolyA signals

    Type
    Blog Post
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    March 31, 2016, 2:30 p.m.
    ...given host cell type are generally broken down into two broad categories, prokaryotic or eukaryotic, based...across cell types, but polyadenylation generally serves to promote transcript longevity in eukaryotes and...quality control mechanism to rid the cell of mis-folded RNAs. Eukaryotic termination and polyadenylation Unlike...processes for eukaryotic termination are understood and it has been noted that each eukaryotic RNA polymerase... contain. Plasmid DNA in both prokaryotic and eukaryotic systems must be transcribed into RNA, which occurs...polyadenylation Although mostly thought of as a eukaryotic-specific process, prokaryotes also add poly(A...(A) tails to certain RNAs. Unlike the eukaryotic mechanism which requires a consensus sequence for the...
  7. Plasmids 101: Protein tags

    Type
    Blog Post
    Published
    Dec. 11, 2014, 4:26 p.m.
    ...being spent to make something the cell doesn’t need to make. Eukaryotes and some bacteria deploy proteosomes...a recombinant protein? It is not generally in a cell’s best interest to overexpress a protein. Energy ...proteosomes to degrade what the cell might consider junk protein. Though there are a number of chemical and...Prokaryotes can also have a hard time folding eukaryotic proteins. You can get your bacteria to produce...Purification Can improve solulibility and folding of eukaryotic proteins in prokaryotes; single step purification... Not great for purification; too cleavable in eukaryotes TAP GRRIPGLINP WKRRWKKNFI AVSAANRFKK ISSSGALDYD...recognition site. In fact, SUMO cannot be used in eukaryotes because there is already too much SUMO protease...
  8. Chromoproteins: Colorful Proteins For Molecular Biology Experiments

    Type
    Blog Post
    Published
    Feb. 4, 2020, 2:15 p.m.
    ... them into your cells, you can simply look for blue colonies to determine which cells have taken up the... mScarlet as the donor in HeLa cells.   Find ShadowR for mammalian cell expression here   Now that you...cloning experiment worked just by looking at the cells on the plate. For example, if your plasmid contains...applications. Find a chromoprotein for your experiment! Eukaryotic chromoproteins for bacterial synthetic biology...common chromoproteins used in the lab come from eukaryotes, they can be difficult to directly use in bacteria... greatly between chromoproteins. In some cases, cells containing high-copy plasmid-borne chromoproteins...Here, the chromoprotein is expressed and gives the cell a magenta (amilCP) or purple (tsPurple) color. Though...
  9. Plasmids 101: Using Transposons in the Lab

    Type
    Blog Post
    Published
    July 6, 2021, 1:28 p.m.
    ... yeast, plant, insect, and mammalian cells, including human cells. piggyBac is biased to integrate at ... in the genomes of many other prokaryotes and eukaryotes, and make up ~45% of the human genome (Munoz-...elements that are found in both prokaryotic and eukaryotic genomes.  Components of a transposon system ...is active in vertebrates and integrates in human cells at rates similar to retroviral vectors. The hyperactive...piggyBac has an integration efficiency in human cells similar to retroviral vectors. The hyperactive PB...transposase (hyPB) is ~10-fold more active in mammalian cells compared to the codon-optimized wild-type piggyBac...G/C)TNA. Tol2 can deliver 10-11 kB to mammalian cells without decreased efficiency, with a maximum cargo...
  10. Plasmids 101: Protein Expression

    Type
    Blog Post
    Published
    June 7, 2018, 1:17 p.m.
    ...produced using complex mixtures derived from cells or using live cells. There are several types of expression...consists of transfecting cells with your DNA template of choice and allowing these cells to transcribe, translate...demanding cell culture conditions compared to other systems. Insect expression systems Insect cells can also...coli or yeast cells. The only problem with baculovirus systems is that the infected host cell is eventually...eventually lysed. Cell lysis halts protein production, but there are non-lytic insect cell expression systems...Sf21, Hi-5 cells)  that allow for continuous expression of genes integrated into the insect cell genome. ...that is then transformed into a bacterial cell. Transformed cells propagate, are induced to produce your ...
  11. Avoiding the Dark Side of Fluorescent Protein Fusions with mOX FPs

    Type
    Blog Post
    Published
    Oct. 27, 2015, 3 p.m.
    ...numerous cell biology assays. However, there has been a pervasive view that most FPs in a cell will fold...fluorescent fusion proteins in cell biology."Current Protocols in Cell Biology (2005): 21-4. Pubmed PMID...Lee. "Fluorescent proteins: a cell biologist's user guide." Trends in cell biology 19.11 (2009): 649-655...-fusions on quantitative imaging experiments and cell physiology in general. Pitfalls of Fluorescent Protein...quantitative imaging experiments or even negatively impact cells (see Figure 1). When behaving properly, FPs enable...dynamics of fluorescent protein fusions in live cells in real time. Previously, we have described a number... i.e. positioning of the FP sequence relative to cell compartment targeting sequences, which often have...
  12. Five Popular Model Organisms

    Type
    Blog Post
    Published
    April 11, 2019, 12:39 p.m.
    ... properties and processes with our own cells. Like human cells, yeast DNA is packaged into chromosomes...differentiation of β-cells in the the developing zebrafish pancreas. They first tagged these cells using plasmids...recapitulate the complex interactions between cancer cells, therapeutic drugs, and the rest of the body than...than studies in other model organisms or cell culture. For example, Scott Lowe’s lab utilized mice to study...to identify a set of mutations that made cancer cells more resistant to chemotherapy. You can find these...to optimally control gene expression in specific cells of the fly (Pfeiffer et al., 2010). Yeast (Saccharomyces...Saccharomyces cerevisiae) Yeast, one of the simplest eukaryotic organism, is a commonly used model organism in...
  13. To Codon Optimize or Not: That is the Question

    Type
    Blog Post
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    Nov. 12, 2020, 2:15 p.m.
    ...mammalian cells. This was the first codon optimized membrane protein expressed in mammalian cells. In this...sequence. That means there are 61 possible tRNAs. Cells however, may not express all 61 of these tRNAs and...commonly, scientists codon optimize genes from eukaryotic organisms for expression in prokaryotic systems... are also optimized for expression in mammalian cells. For example, Henry Lester’s lab optimized the C...base-pairing mechanism for translation initiation in eukaryotes. Nat Struct Mol Biol 13:30–34 . https://doi.org...Caenorhabditis elegans GluCl ion channel genes for mammalian cells dramatically improves expression levels. Journal...
  14. Designer PUF Proteins for Any RNA Target

    Type
    Blog Post
    Published
    June 17, 2014, 7:57 p.m.
    ...spatio-temporal control of gene expression within a cell. Thanks to the work of Huimin Zhao and colleagues...avenue of modifying and manipulating endogenous eukaryotic RNA.” Endless possibilities with PUF proteins...
  15. Plasmids 101: Gene, enhancer, and promoter trapping

    Type
    Blog Post
    Published
    May 2, 2023, 1 p.m.
    ...fluorescent protein (GFP) was the reporter gene and green cells were observed in the kidneys at a specific developmental...genes of interest may not be expressed in the tissue/cell line you are working with. Development-specific...plain sight: what remains to be discovered in the eukaryotic proteome? Open Biol. (2019) 9:180241. DOI: https...10.7554/eLife.67667 Springer, S. P. Gene Traps. Plant Cell. (2000) 12(7): 1007-1020. DOI: 10.1105/tpc.12.7.1007...
  16. Why and how to start studying chromatin (with Addgene's help)

    Type
    Blog Post
    Published
    June 12, 2018, 11:40 a.m.
    ...architecture to every diagram portraying some aspect of eukaryotic DNA would become busy and potentially detract... R, Schmalhorst PS, Jude JG, Zuber J, Gerlich DW Cell. 2017 Aug 24;170(5):956-972.e23 Screen identifies... R, Schmalhorst PS, Jude JG, Zuber J, Gerlich DW Cell. 2017 Aug 24;170(5):956-972.e23 Rapid and phosphoinositol-dependent... Rando OJ, Xue Y, Swiderek K, Kuo A, Crabtree GR Cell. 1998 Nov 25. 95(5):625-36. An architectural role..., Ensminger AW, Fox AH, Chess A, Lawrence JB Mol Cell. 2009 Mar 27;33(6):717-26. Reporter-nanobody fusions...
  17. Back to Bacteria: CRISPR gRNA Multiplexing Using tRNAs

    Type
    Blog Post
    Published
    June 2, 2015, 6:06 p.m.
    ...toolkit in human cells. Nissim L, Perli SD, Fridkin A, Perez-Pinera P, Lu TK. Mol Cell. 2014 May 22;54(... or pre-tRNAs are cleaved by RNase P and Z in eukaryotes (E in bacteria), and only a few elements of tRNAs...tRNAs are among the most abundant molecules in a cell, this system is clearly also robust enough to ensure... tRNA processing is common to prokaryotes and eukaryotes. Though the plasmids made by Xie et. al are specifically...
  18. CRISPR 101: Ribonucleoprotein (RNP) Delivery

    Type
    Blog Post
    Published
    Sept. 6, 2018, 12:02 p.m.
    ...can often be used in cells that are difficult to transfect, such as primary cells. Using RNPs can also...with protein expression that occur in cells where common eukaryotic promoters (such as CMV or EF1A promoters...interest. This is commonly performed by transfecting cells with a plasmid, such as PX459, which encodes Cas9...must be considered when using this method:     Cells must be amenable to transfection or viral transduction...protein in complex with a targeting gRNA, to your cells of interest. Cas9 RNPs are capable of cleaving genomic...single or multi-gene knockouts in a wide variety of cell types, gene editing using homology directed repair...after transfection, and are quickly cleared from the cell via protein degradation pathways. This makes Cas9...
  19. CRISPR Methods for Bacteria: Genome Engineering, CRISPRa, CRISPRi, Base Editing, and More

    Type
    Blog Post
    Published
    Sept. 28, 2020, noon
    ... This system is distinct from those used in eukaryotes in that CRISPR isn’t the primary editing force... is primarily a means of selection that targets cells in which homologous recombination has not occurred...ensures high editing efficiency; the only non-edited cells to survive have inactivating mutations in the Cas9... similarly to CRISPR/Cas9 systems adapted for eukaryotes in that Cas9-mediated cleavage induces HDR to...design more familiar to those using CRISPR in eukaryotes (Qi et al., 2013). As in other systems, catalytically...one or more genes in E. coli. and in a mammalian cell line (Qi et al., 2013). Two important features of...the bacteria are unable to resolve them, and the cells die.  This could be applied to diseases where the...
  20. Split Fluorescent Proteins for Studying Protein-Protein Interactions

    Type
    Blog Post
    Published
    May 3, 2022, 1:15 p.m.
    ...measuring protein expression or localization in cells, or even single-particle tracking of the bound complex...(1–10) and GFP(11) Versatile protein tagging in cells with split fluorescent protein. Kamiyama et al. ...oxygenase for chromophore formation (abundant in eukaryotes) A Near-Infrared BiFC Reporter for In Vivo Imaging...oxygenase for chromophore formation (abundant in eukaryotes) Bright monomeric near-infrared fluorescent proteins...tracking of protein-protein interactions in living cells. Shao et al. Commun Biol. 2021 Yujie Sun   For...bright enough for single-molecule tracking in live cells.  Controls  When designing experiments, it’s important... fragments themselves can sometimes interact in cells and produce background signal (especially for some...
Showing: 21 - 40 of 61 results