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Showing: 61 - 80 of 169 results
  1. Plasmids 101: Transformation, Transduction, Bacterial Conjugation, and Transfection

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    Blog Post
    ...two nutritional deficient E. coli strains that resulted in a wild type E. coli (Griffiths et al., 2000)...don't exactly "eat" plasmids as depicted in this comic, when a bacterium uptakes a plasmid, the genes on the... the plasmid can give them different phenotypes. For example, this plasmid encodes a green fluorescent... Read all of our Plasmids 101 blog posts Check out all of our blog posts on plasmid cloning Resources...comes from adjacent lysed bacteria and can include plasmid DNA or fragmented DNA released into the environment...membrane so the bacteria can easily uptake your plasmid of interest. Scientists can also use electroporation...exist as transient extrachromosomal DNA, like a plasmid, or it can integrate into the host bacterium’s ...
  2. Targeted Mutagenesis with EvolvR

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    Blog Post
    ...specific mutations in your plasmids Use REPLACER Mutagenesis to mutate your plasmid Resources on Addgene....polymerase I (PolI3M) is capable of mutagenesis in E. Coli, but this approach requires special bacterial growth...mutations per nucleotide per generation of wild-type E. coli, while only increasing the standard mutation rate... targeted mutagenesis experiments? Find EvolvR plasmids at Addgene! References Gaj, Thomas, and Pablo...Browse our CRISPR guide pages Find bacterial CRISPR plasmids ...
  3. To Codon Optimize or Not: That is the Question

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    Blog Post
    ... usage bias in Plasmids 101: Codon usage bias Read more about plasmids in our Plasmids 101 blog series...with codon bias across all endogenous genes in E. coli and S. cerevisiae (Tuller et. al., 2010). ...codon optimizing a human gene for expression in E. coli. Genes are also optimized for expression in mammalian...Reference Read about genetic code expansion Browse our plasmid collection page  ...Optimization References Athey J, Alexaki A, Osipova E, Rostovtsev A, Santana-Quintero LV, Katneni U, Simonyan...rna.02890211 Tuller T, Waldman YY, Kupiec M, Ruppin E (2010) Translation efficiency is determined by both...
  4. CRISPR Library Amplification

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    Protocol
    ... amplification of CRISPR pooled plasmid libraries in Escherichia coli cells....allows the amplification of a pooled-plasmid library in Escherichia coli cells. Pooled libraries contain tens...differences, and plasmid recombination can all impact the representation of individual plasmids in the pooled... ). Lentiviral plasmids can recombine between their LTRs resulting in a smaller plasmid containing only...Maxipreps rely on incremental, ordered cell lysis. E. coli cells are subject to lysis by freeze-thaw if not... tens to millions of different plasmids in a single sample. They are often used for screening, barcoding...throughput multiplexed experiments. These pooled plasmids differ by only a short region of DNA: guide RNAs...
  5. Lab Safety for Biosafety Levels One and Two

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    Protocol
    ...in healthy humans, for example, non-pathogenic E . coli . BSL-2 is for labs that work with pathogens including...here has been designed by the Addgene nonprofit plasmid repository and is being shared outside of Addgene...
  6. Protocol - Bacterial Transformation

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    Protocol
    ...Learn how to transform E. coli with your plasmid of interest.... also like... Plasmid Cloning by Restriction Enzyme Digest Restriction Digest of Plasmid DNA DNA Ligation...both storing and replicating plasmids. Because of this, nearly all plasmids (even those designed for mammalian...that will help to maintain the plasmid without rearrangement of the plasmid DNA. Additionally, specific ...tube of plasmid DNA and just need to transform bacteria so that you can grow up more of the plasmid) you ...efficient at taking up larger plasmids. If you need to transform large plasmids, it is a good idea to use ...introduced into a cell. Transformation of bacteria with plasmids is important not only for studies in bacteria ...
  7. CRISPR 101: Cytosine Transversion Editors

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    Blog Post
    ...opposite, a uracil DNA N-glycosylase (UNG) from E. coli. The resulting construct, eUNG-BE4max(R33A)ΔUGI...out of 30 target sites. But the same strategy in E. coli produced different results. GBEs seemed to follow...— by excising the freshly edited U bases — but E. coli instead filled those abasic sites with A's, producing...). In addition, they showed that UNG from both E. coli and C. elegans could be effective components of...Additional resources on Addgene.org Browse CRISPR plasmids for base editing Get a broad overview with our...uracil bases in DNA. References Chen, L., Park, J. E., Paa, P., Rajakumar, P. D., Prekop, H.-T., Chew, ...https://doi.org/10.1038/s41467-021-21559-9 Huang, M. E., Qin, Y., Shang, Y., Hao, Q., Zhan, C., Lian, C.,...
  8. New CRISPR Tools: Cas7-11 and PASTE

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    Blog Post
    ...from the bacterial genome, and inserted it into E. coli to express and then test for any proteins that ... addition, when they looked at the transformed E. coli expressing Cas7-11, they found no evidence of growth...Use PASTE can be delivered via a single dose of plasmids, works in non-dividing and primary cells, and .... They classified the system as Class I, Type III-E, and then used this information to identify a large...Resources References  Özcan A, Krajeski R, Ioannidi E, Lee B, Gardner A, Makarova KS, Koonin EV, Abudayyeh... John A. Walker II, Anastasia P. Kadina, Adrianna E. Zepeda, Kevin Holden, Jonathan S. Gootenberg, Omar...
  9. Introducing Addgene's Microbiology Pages

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    Blog Post
    [email protected]. If you are looking for plasmids used in E. coli and yeast, you’re in luck! Addgene has...Collection page, you can browse for plasmids by species and find our guides, plasmid kits and other resources for...microbial research. Kits, guides, plasmids, and more We have Plasmid Kits for microbial work with fluorescent... To make it easier for you to find plasmids for your work, plasmids in the Microbiology Collection are... a useful plasmid that’s not in the collection? Tell us about it with our Suggest a Plasmid Form! Finally...develop resources for your community! To contribute plasmids made in your lab, see www.addgene.org/deposit ...
  10. Plasmids 101: Modular Cloning Applications and Kits

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    Blog Post
    ...supplemental add-on kit and is compatible with E. coli and/or cell-free systems. Protein expression in... al. “EcoFlex: A Multifunctional MoClo Kit for E. Coli Synthetic Biology.” ACS Synthetic Biology, vol....MoClo: Improved MoClo Assembly Standard and New E. Coli Part Library Enable Rapid Combinatorial Design ...between CRISPR components expressed from different plasmid backbones. They noted that backbone differences... as the order, or distance in the placement of plasmid elements can impact expression levels and consequently...system was used to assess how different lentiviral plasmid backbone elements impact viral titer and to compare...plants, and animals (Chiasson et al., 2019). Many plasmid elements such as promoters or fluorophores are ...
  11. Plasmids 101: TOPO Cloning

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    Blog Post
    ...Deletions in a Plasmids Learn How to Verify Your Plasmid Resources on Addgene.org Find More Plasmid Cloning... reaction into chemically or electro-competent E. coli - excess salt causes arcing during electroporation...vaccinia virus DNA topoisomerase I in Escherichia coli is sequence specific."  Proc Natl Acad Sci U S A...
  12. INTEGRATE: Bacterial Genome Engineering Using CRISPR-Transposons

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    Blog Post
    ... involving two-plasmid or single-plasmid systems (Vo et al., 2020). In the two-plasmid system, an effector...separate plasmids and multiple promoters were used to express the necessary components in E. coli (Klompe...temperatures. Data adapted from Vo et al., 2020. In E. coli, the new streamlined VchINT system was shown to...effector plasmid (pEffector) expresses all seven required genes and the CRISPR RNA under the same promoter...promoter, and a donor plasmid (pDonor) encodes the mini-transposon. pEffector and pDonor can also be combined...combined in single-plasmid INTEGRATE (pSPIN), which offer simple transformations for smaller cargos, and ...and the ability to easily cure cells of the plasmid after integration. Figure 2: (A) Streamlined ...
  13. Rewiring Metabolic Circuitry with CRISPR RNA Scaffolds [Video]

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    Blog Post
    ...), 339-350 (2015). PubMed. Find the Plasmids @Addgene: Plasmids for CRISPRi are described here: http...metabolic engineering realm of S. cerevisiae and E. coli. The utility of simultaneous and multidirectional...overexpression of various metabolites in Escherichia coli or Saccharomyces cerevisiae with few techniques ...constructs to be introduced simultaneously in a single plasmid. The functionality of the RNA scaffolds follows...http://www.addgene.org/crispr/qi/ Plasmids described in  Zalatan et al. Cell  (2015) can be found here...https://www.addgene.org/browse/article/9593/ Plasmids described in Qi et al. Cell  (2013) can be found...
  14. Ghanaian Researchers to Receive Plasmid Awards from Addgene and Seeding Labs

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    Blog Post
    ...construction of new plasmids. Dr. Duedu will also use polymerases produced using plasmids from Addgene to ...tools to construct chimeric cellulases that enable E. coli and Citrobacter freundii to generate sugars from... has been working with Seeding Labs to provide plasmid grants to researchers in developing countries. ... to announce that we’ve selected our first two plasmid grant awardees: Drs Louis Bengyella and Kwabena...doctors Bengyella and Duedu and how they plan to use plasmids from Addgene to advance their research. Louis ...cellulosic biomass. Dr. Duedu would like to use the plasmids he acquires through Addgene to produce molecular...fluorescent proteins. Dr. Duedu’s plans for these plasmids have a heavy focus on teaching. He hopes to teach...
  15. General Transfection

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    Protocol
    ..., the plasmid should also be propagated in an endonuclease negative E. coli strain such as NEB stable....therefore, plasmid DNA purification should include an endotoxin removal step. For high quality plasmid DNA, ...protocol to transfect mammalian cells with your plasmid of interest. Protocols...is prepared, transfect cells with a fluorescent plasmid using a variety of ratios. Check the cells 1–2 ...
  16. Antibodies 101: Single Chain Fragment Variables (scFvs)

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    Blog Post
    ...format that’s easier to express in the cytoplasm of E. coli, although this is not possible for all scFvs. ...insect cells, they are most often expressed from a plasmid in bacteria (Ahmed et al., 2012). One challenge...single-chain Fv analogue produced in Escherichia coli. Proceedings of the National Academy of Sciences...Sivaccumar JP, Ruvo M (2020) Evolution of Escherichia coli Expression System in Producing Antibody Recombinant...Resources on Addgene.org: Browse Addgene’s Antibody Plasmid Collection Find antibodies for neuroscience research...Novotny J, Margolies MN, Ridge RJ, Bruccoleri RE, Haber E, Crea R (1988) Protein engineering of antibody binding...
  17. A New Optogenetic Tool Based on AraC Controls Gene Expression with Blue Light

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    Blog Post
    .... pBLADEONLY: This plasmid contains only BLADE and is based on the pTRC99a plasmid. It does not include...called BLADE (blue light-inducible AraC dimers in E. coli) that turns expression on and off with blue light...AraC and other promoter systems, head over to our Plasmids 101: Inducible Promoters article.) Modifying AraC...reporter downstream of the PBAD promoter. To use this plasmid with your gene of interest, you would replace mCherry...PBAD promoter. If you already have a pBAD33-based plasmid expressing your gene of interest, all you have ... and shared with Addgene. You can find all the plasmids deposited from Di Ventura's lab, including the...nuclear export system (LEXY) here. Optogenetic plasmids from the Khammash lab can also be found here. ...
  18. Plasmid Tools for Microbiome Studies

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    Blog Post
    ...conjugative mobilization of broad host-range IncQ plasmids." Plasmid 62.2 (2009): 57-70. PubMed PMID: 19465049...page Deposit microbiology plasmids with Addgene Find synthetic biology plasmids ...determined. The lab used DCDC to measure growth rate of E. coli for over 10 generations and showed that this method...such as Snodgrassella alvi and Gilliamella apicoli. The plasmids could also be transformed into Alphaproteobacteira... With MAGIC, scientists introduce an Escherichia coli donor strain into the microbiome to deliver a genetic...family-RP4 conjugation system. This system can deliver plasmids to both Gram-positive and Gram-negative cells.... Wang lab further developed a modular suite of plasmids (pGT) with various replicative origins that can...
  19. Plasmid Preps: Different Purity, Different Quantities, Different Uses

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    Blog Post
    ...Not all plasmid preps are the same. Before purifying a plasmid from a bacterial culture, it is important... into a plasmid backbone. Transfection grade DNA Figure 3: Need to introduce plasmids into mammalian... an external plasmid in mammalian cells and it will likely require micrograms of plasmid DNA for each ...utilize your plasmid DNA, so that you can decide what will be the optimal type of plasmid preparation ...Addgene blog Browse blog posts on plasmid cloning Read our Plasmids 101 blog posts Learn about the differences...of the cell wall of Gram negative bacteria like E. coli that affects tissue culture cell line viability...purity. Based on these premises we can classify a plasmid preparation in 3 different ways: Transformation...
  20. Synthetic Biology, Artificial Chromosomes, iGEM & More - Interview with Tom Ellis

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    Blog Post
    ... underway in the Ellis lab including yeast and E. coli engineering, microbial cooperation, and antibiotic...Synthetic Biology Education Nonprofit BioBuilder Plasmids 101: Golden Gate Cloning Learn About Working at...Michael Koeris Resources at Addgene.org Find Plasmids from the Ellis Lab Find Synthetic Biology Kits...
Showing: 61 - 80 of 169 results