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Showing: 241 - 260 of 618 results
  1. Twenty Years of Sharing: Expanding Accessibility

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    ...China, Korea, Japan, Brazil, India, and Mexico. Table 2: Addgene distributors Distributor Partnership...distribution after we partnered with them (Figure 2). In others, the distributor helped solve an issue...temperature for the duration of their journey. Figure 2: Annual distribution of items to countries with a ...a less tangible form: knowledge and information about the materials in our repository. We started to increase...by making it easier to find materials and learn about them. As early as 2007, we began grouping similar...professors, stopping by to say, “Everything I know about virus, I learned from Addgene,” or “I learned to...seeing our resources shared via social media, on collaborators’ websites, or as a recommendation in a Reddit...
  2. Plasmids 101: Plasmid Incompatibility

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    Blog Post
    ...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...101 blog posts Learn more about the origin of replication Find blog posts about plasmid cloning Resources... plasmids within the same bacterial cell, think about whether plasmid incompatibility will affect your...this is expanding as we obtain more genomic data about plasmids (Shintani et al., 2015). Now, bioinformatics...of the microbiological world. (Want to know more about these plasmid types? Read our Plasmids 101: Environmental...
  3. 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...columns we’ve been talking about!) are a significant source of waste in laboratories. To help combat this, ...dependent on many different factors as we detailed above, so be sure to pick what kit works best for you!...
  4. The PAM Requirement and Expanding CRISPR Beyond SpCas9

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    ...is unique compared to the rest of the genome and (2) the sequence is located just upstream of a Protospacer...pyogenes Cas9 variants with varying PAM sequences, 2) the use of Cas9 homologs derived from species other...Cpf1 Is a Single RNA-Guided Endonuclease of a Class 2 CRISPR-Cas System. Cell 163:759–771 . https://doi....Resources on the Addgene Blog  Read more about Cpf1 Read more about SaCas9 and AAV Check out our CRISPR Featured... and VRER) recognize novel PAM sequences (shown above). The VQR, EQR, and VRER Cas9 variants are capable...example, Cas9 from Staphylococcus aureus (SaCas9) is about 1 kilobase smaller than SpCas9, so it can be packaged...
  5. Hot Plasmids: Fall 2024

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    ...improve solubility and stability (Figure 2).      Figure 2: Crystal structures of CRBNmidi alone...fluorescent tags in Caenorhabditis elegans. Genetics, 228(2), iyae126. https://doi.org/10.1093/genetics/iyae126...more feasible, the lab of Alessio Ciulli and collaborators developed CRBNmidi (Kroupova et al., 2024). ...stepwise, achieving mutation efficiencies of up to about 9% of colonies (102 to 104 times higher than traditional...Bentley Time to get flexible! Alex Dunn’s lab and collaborators have deposited a new mechanosensor called PILATeS...
  6. Antibodies 101: Reading a Flow Plot

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    Blog Post
    ...A-B+ cells. If you look at the dot plot in Figure 2, you might assume that all cell populations are positive... the different populations. In the case of Figure 2, one population is B- and another two are B+. Our ...are in the lower right corner.      Figure 2: This flow plot has two populations that are B+ and...series of one- or two-marker plots, like in Figure 3 above, until the population of interest has been successfully...  Of course, there are many more things to learn about when diving into flow cytometry data. There’s different... ways to use FSC and SSC, as briefly alluded to above. There’s many variations in how one can gate, select...
  7. Scientific Peer-review: Providing Critical and Kind Feedback and Advocating for Open Science

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    ... go back and finish the review.  Peer-review step 2: Detailed assessment After this initial assessment...salt-induced changes in root-to-shoot ratio in Arabidopsis, (2) expression patterns in plants with enhanced sodium...section-specific comments, I re-read what I wrote about the paper after my initial read, adjust my language...wish for The last thing that I wanted to mention about the peer-review, is that as a peer-reviewer, you...each peer-review, I try to mention what I liked about this paper and recognize the hard work that the .../visualization using R/Shiny. She is passionate about open science, BIG data analysis and sharing whatever...review article Resources on Addgene.org Learn about depositing plasmids pre-publication Find molecular...
  8. Early Career Researcher Toolbox: Free Tools for Science Writing

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    ...episode 2 "Organizing Literature" : I found out about Zotero here Dear Grad Student podcast episode 2 "Essential...frequency of use in black. This paper talks more about the development of the De-jargonizer.   Academic...with others which makes it easier to work with collaborators. Zotero is a desktop based program that’s compatible...Programming, & Productivity": This podcast talks about Mendeley, Zotero, and other citation managers and...the pomodoro technique": This podcast talks more about using the Pomodoro method in grad school Additional...
  9. Tips for CRISPR Gene Editing in Mice

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    ... than control, 3; same as control (Cetn1/sgRNA1), 2; darker than control, 1; very dark). Brighter fluorescence...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...the pX330 plasmids used in the validation assay (above) and it is just as effective (Mashiko et al., 2014...Engineering with CRISPR Validate Your Genome Edit Learn about Non Homologous End Joining and Homology Directed...
  10. Even more elegant: Single injection CRISPR/Cas9 in C. elegans

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    ... one injection step! The entire protocol takes about 2-3 weeks but requires less than eight hours worth...for C. elegans genome modification. Figure 2: Schematic from Dickinson et al. (2015) illustrating... this species, namely, the robust HDR mentioned above, an accessible germline, and multiple selectable...modular system that requires very little hands-on labor and could facilitate the tagging of every protein...
  11. Hot Plasmids - September 2019 - CRISPR, Auxin Inducible Degradation, MerMAID Channelrhodopsins, and Genome Looping

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    ...target sites for editing. PAM sequences can be from 2-6 base pairs in length and follow the DNA sequence... Eric Perkins Mammalian genomic DNA is not just a 2-D linear molecule snaking through our cells’ nuclei... plasmids you need. If you'd ever like to write about a recent plasmid deposit please sign up here.    ...neurons. Earlier this year, the Hegemann lab and collaborators report their discovery of a new family of seven...
  12. 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...vector name and serotype you’d like to be notified about. Controls Plasmid Serotype Name 37825  AAVrg...vectors 101 eBook Resources on Addgene.org Learn about Addgene's viral service Find viral protocols and...
  13. Plasmids 101: Broad Host Range Plasmids

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    ...host range plasmids. FEMS Microbiology Letters, 348(2), 87–96. https://doi.org/10.1111/1574-6968.12241  ...mobilization of broad host-range IncQ plasmids. Plasmid, 62(2), 57–70. https://doi.org/10.1016/j.plasmid.2009.05.001...negative hosts. Biotechnology and Bioengineering, 106(2), 326–332. https://doi.org/10.1002/bit.22695  Schmidhauser...plasmids may have high copy numbers and reduced metabolic load (Meyer 2009). Figure 1: Idealized ...
  14. New Acoustic Reporter Genes: Ultrasound Imaging of Gene Expression

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    ...under phase contrast starting day 2 after transfection.     Fig: 2: Expressing mARGAna in MDA-MB-231...engineering a cell line, cotransfect the mARG cassettes 2:1 (A:N-V) with PiggyBac transposase and outgrow the...you enjoy playing with our genes. Have fun!    About the authors: Marjorie Buss is a PhD student studying...
  15. Visualizing Translation at the Single Molecule Level

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    ...the reporter mRNA is labeled by PCP-mCherry (Figure 2). The 3’ UTR also contains a CAAX sequence to bind...PMC2746483 Find ribosome profiling plasmids at Addgene. 2. Halstead, James M., et al. “Translation. An RNA biosensor...Additional Resources the Addgene Blog Learn More about SunTag Catch up on Your GFP Background Choose the...
  16. Synthetic Photobiology: Optogenetics for E. coli

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    ...in Escherichia coli. Tabor JJ, Levskaya A, Voigt CA. J Mol Biol. 2011 Jan 14;405(2):315-24. doi: 10.1016...Marcotte EM, Voigt CA. Nature. 2005 Nov 24;438(7067):441-2. PubMed. Find the plasmids from this publication ...and Jeffrey Tabor have been working on making E. coli light responsive since 2005, when Tabor was working...these classic systems continue to be optimized by Tabor’s lab, making light-controlled gene expression in...for the computational problem of edge detection. Tabor et al. subsequently engineered a second photosensitive... and highest level of “output” signal, was only about 10-fold, precluding the study of gene expression...-component systems. Schmidl SR, Sheth RU, Wu A, Tabor JJ. ACS Synth Biol. 2014 Nov 21;3(11):820-31. doi...
  17. Four Factors that Differentiate the Stem Cell Field

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    ...Stem Cell Researcher Darrell Kotton 2. Stem cell scientists care about patients As any grad student who ... Yamanaka explained that it took 50 people nearly 2 years to create the first stem cell line that could...the Addgene Blog Learn about Efforts to Fight Rare disease with iPSCs Read About Addgene's Outreach Efforts...the first clinical trial with iPSCs with his collaborator Takahashi in 2014 – just 8 years after the OSKM...researchers special: 1. Stem cell scientists care deeply about ethics Ethics must play a prominent role in the ... a big picture perspective: Dr. Yamanaka talked about his clinical trial patients with advanced macular...proof that these researchers are thriving in a collaborative, rather than a combative, field. Of course they...
  18. Antibodies 101: Single Chain Fragment Variables (scFvs)

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    ...panning and scFv characterization.    Figure 2: Phage display starts with a pooled library of scFvs...the short epitope GCN4, also called a scaffold; and 2) a GCN4 binding scFv that’s fused to GFP. When the...Fv (Variable Domain) (scFv) Fragments. Antibodies 2:193–208 . https://doi.org/10.3390/antib2020193  Khantasup... Read about frankenbodies, an anti-HA scFv-based probe for fluorescent imaging. Learn more about antibodies...Köhler who developed hybridoma technology. But what about single chain fragment variables (scFvs)? scFvs weren...from inclusion bodies, it’s time-consuming and laborious.  To avoid this, one or more of these approaches...antibodies  Read about another reagent sharing platform for antibodies, the Developmental Studies Hybridoma...
  19. Plasmids 101: Common Lab E. coli Strains

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    ...Table 2: Lab strains of E. coli Strain Natural resistance Primary Use Genotype ccdB Survival 2 T1R ...resistance to tetracycline Additionally, Table 2 provides a quick reference for some of the popular...thiamine metabolism Requires exogenous thiamine for growth ara disruption of arabinose metabolism pathway...little prokaryotic minions that carried out the labor-intensive process of replicating your new plasmid... Phage resistance gal Mutation in galactose metabolism pathway Cells cannot grow on galactose only ...repressed more   LacZ β-galactosidase activity abolished   lacY Lactose permease inactivated, lactose...plasmid stability recBCD Exonuclease V activity abolished Increased plasmid stability, reduced recombination...
  20. Will You Be My Mentor? Finding and Asking for Mentoring Support

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    ...article in the Addgene Blog Mentoring series will cover 2 of the 7 mentoring questions I set out to answer. ...101-Building Relationships for Success”. Choose 1-2 tactics to try. One of my favorites is making the ...work if both parties are diligent about replying and thinking about good questions and answers. Professional...Sometimes, it is not who you know but who knows about you. I found some other great tips for finding mentors...Medical School researcher Connie Cepko to learn about her mentoring style. Mentors at home and away We...Catalyst Report “Making Mentoring Work” to learn about what makes a good mentoring program. If your organization...much less threatening! If they say no, don’t worry about it. It is a compliment to ask someone to share their...
Showing: 241 - 260 of 618 results