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  1. How Addgene Creates Content

    Type
    Blog Post
    Published
    Nov. 17, 2022, 2:15 p.m.
    ...Addgenie expertise we can. We even have a Slack channel just for asking people if they can write or review ... is our Help Center, help.addgene.org, where you can easily search articles answering all of our frequently... our depositors and customers are asking. So how can you get involved? Keep asking your burning questions...and tell us what you want to know more about! You can also suggest blog topics or even reach out about ...support and advance the scientific community, and we can only do that with your help.     Additional Resources...

  2. Hot Plasmids - December 2019 - CRISPR pooled library, LipoGlo, CRISPRa, and Voltage Imaging Tools

    Type
    Blog Post
    Published
    Dec. 10, 2019, 1:58 p.m.
    ...genome. Thus the gRNAs responsible for a phenotype can be identified by next-generation sequencing of the...readout. This retroviral mouse CRISPR pooled library can be used for screening of cells that are refractory...lipoproteins through the circulatory systems, but can also lead to the formation of atherosclerotic plaques...transmit electrical information. Such voltage imaging can be performed in intact animals and offers many advantages...found several voltage biosensors and conditions that can be used to monitor real time voltage changes in worms...-mOrange and MacQ-mCitrine. All of these sensors can detect action potentials in worms with fluorescence...libraries was not possible. Primary murine T cells cannot be transduced by lentivirus and have been difficult...

  3. Four Factors that Differentiate the Stem Cell Field

    Type
    Blog Post
    Published
    Sept. 28, 2016, 2:35 p.m.
    ...protein interacts with that one promoter can tell you, it can be easy to get lost in the details. The ...like stem cell biology where questions of ethics can have profound impacts on the development of applications...and appreciate the importance of ethics, the topic can often take the back burner at scientific conferences...international borders. While questions of ethics can be daunting because they have no clear cut answers...stem cell community with their research, I think I can speak for Addgene when I say that I'm glad we're ... important questions that the scientific method cannot address. Listen to Our Podcast Interview with Stem...

  4. We're Updating Our Hold for Publication Policy

    Type
    Blog Post
    Published
    June 24, 2025, 1:15 p.m.
    ...publishing research papers can be long and unpredictable. Fortunately, you can submit plasmids at any point... your plasmids! You can make your deposit available before publication and we can update the plasmids’...is posted in order to support these goals. And we can update your plasmids’ citation to the final journal...unresolved sequencing issues or if you’ve asked to cancel the deposit due to experimental problems, legal...article is published. As much as we’d like to, we can’t keep up with every paper that comes out! So, before...

  5. Interview with Bart Newland, Addgene’s Newest Board Member

    Type
    Blog Post
    Published
    Aug. 3, 2021, 1:15 p.m.
    ...attorneys with a biology background were in demand. Q: Can you tell me a bit about your job currently? What ... the business world from the mindset of a lawyer can bring a new perspective to an organization. I'm used...an organization. I think these are things that I can bring to Addgene -- that comfort with saying, “if... and judgement to the organization and see how I can help. Q: What do you enjoy doing outside of work?...

  6. A Needle in a Base-Stack: Cas9 Structural Biology

    Type
    Blog Post
    Published
    June 4, 2024, 1:15 p.m.
    ...the CTD can get cozy with DNA. S. pyogenes Cas9 recognizes the PAM sequence 5’-NGG-3’, where N can be any...for genome engineering, and studying its structure can help us understand the parameters of CRISPR experimental...Other techniques, like electron microscopy and FRET, can offer more information on these regions.   Cas9’s...reflecting the less stringent recognition mechanism that can tolerate mismatches in this region. The crystal structure...any base. In Figure 5, we can see why: two arginines make base-specific hydrogen bonds to the guanines...paired to each other? At this point, the protein can switch between the closed and open conformations ...with the rest of Cas9 and is highly flexible; it can rotate about 140 degrees between inactive and active...

  7. Plasmids 101: Dimers and Multimers

    Type
    Blog Post
    Published
    Jan. 10, 2023, 2:15 p.m.
    ...depicted on the left) is ~5.8 kb in length. The plasmid can exist on as a dimer, depicted on the right, with ...bacterial cells compared to monomers, although this can be prevented via antibiotic selection (Crozat, 2014...instances, please note that the supercoiled dimer band can sometimes overlap with the band corresponding to ...Electrophoresis (CGE) analysis Another technique that can detect multimers is capillary gel electrophoresis...laser-induced fluorescence (CGE-LIF) for detection and can provide data on the quantity of various topologies...strain that is deficient in recombinase protein RecA can reduce the frequency of multimerization, and in some...temperature such as 30°C or optimizing the incubation time can help maintain cultures in log phase growth. In a ...

  8. Transferable Skills Guide: Teamwork

    Type
    Blog Post
    Published
    Nov. 28, 2017, 2 p.m.
    ...expertise and skills of many of my colleagues, I can also orchestrate the formation of high-functioning-but-temporary...to have their own specialties. This type of team can exist indefinitely. If you’re looking for this type...biostatistician, and that one golden-handed technician who can do a certain difficult assay with her eyes closed...the skills are not cherry-picked. We take what we can get since participation on such a team is strictly...without such an association, start one! These teams can offer a sense of solidarity you’re going to crave...about this.” Sometimes the common roles of a leader can be successfully doled out to multiple people: someone...people actually like meetings, but run well, meetings can be a critical part of any successful team. For reasons...

  9. Four Base Editing Reporters to Monitor and Enrich Editing in Real-time

    Type
    Blog Post
    Published
    July 7, 2020, 1:15 p.m.
    ...results in two DSBs that can be repaired by NHEJ restoring mCherry expression. Cells can then be sorted using...editing event. GFP positive cells can be sorted and have a significantly higher frequency of base edits ... created an array of base editing reporters that can help you do just that. Monitoring APOBEC and Cas9...due to a frameshift. Restoration of fluorescence can only occur through editing by a APOBEC-Cas9n-UGI ...Fluorescence-activated cell sorting (FACS) and the editing efficiency can be easily determined by comparing cells expressing...editing event would result in GFP fluorescence that can be visualized and sorted via flow cytometry. ...mutated start codon to initiate protein expression, it can be used for an array of detectable proteins including...

  10. Replacing Paper: Tips for Choosing an Electronic lab Notebook

    Type
    Blog Post
    Published
    July 10, 2018, 1:08 p.m.
    ... functionalities, it can be difficult to figure out all the ways a given ELN can make your lab life easier... full activity on a project. Can you meet the ELN support team? We cannot stress enough how important ... It is important to know in which ways your data can be exported or printed from the ELN when needed. ... reporting on a project – printing your data out can be required every once in a while, so it is good ...your team. Do you need to make sure your research can be patented? I.e. is automated time stamping (detailed...the times and dates of your actions. These records can take the form of written comments, added files, notes...easier. If you can talk to an ELN support team directly, they should be able to walk you through your ...

  11. Plasmids 101: Stringent Regulation of Replication

    Type
    Blog Post
    Published
    June 20, 2024, 1:15 p.m.
    ...to be low copy number. Conversely, plasmids that can initiate DNA replication independently are said to...AT-rich regions of DNA. In a test tube, the DNA helix can be separated by DnaA alone, as long as there are ...occupied by ATP-bound DnaA, the proteins cooperatively can separate the DNA strands. Created with BioRender.... available to bind DnaA. Fun fact! As far as we can tell, DnaA doesn’t need to hydrolyze ATP to do its...from the population, while replicating too quickly can slow cell growth or even kill the host cell. For ...replication of pSC101 depends on host-encoded proteins, it can be regulated indirectly via the same mechanisms that... to keep replication in check, high copy numbers can allow RepA to link iterons from two different plasmids...

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

    Type
    Blog Post
    Published
    Feb. 10, 2015, 3:06 p.m.
    ... recombinant protein expression. Many challenges can arise when over-expressing a foreign protein in E...restriction/methylation system. This means the strain can neither restrict nor methylate DNA. dcm: Similarly...works well for most experiments, the lac promoter can “leak,” meaning that a low level of expression exists...mostly a problem for toxic protein products, which can prevent the culture from reaching the desired density...any) protein expression? Low expression outcomes can result from variety of sources, so fear not—there...not—there are a few simple troubleshooting measures that can help get you back on track: Compatibility: Double-check...Growth Media: Changing media is tricky, because there can be a trade-off between growth rate and protein quality...

  13. Addgene Stands with the Scientific Community

    Type
    Blog Post
    Published
    April 23, 2025, 1:30 p.m.
    ...information. Our agility as a nonprofit resource can prove to be vital during this period of constrained...isn't lost. Universities and research institutions can turn to Addgene as a trusted partner for archiving... difficult to maintain or access. These services can be listed as direct costs from a CRO in grant applications...commitment to collaboration and resource sharing, we can navigate this difficult period together. The future...

  14. Download Science-Themed Zoom Backgrounds from Addgene

    Type
    Blog Post
    Published
    April 22, 2021, 1:15 p.m.
    ...COVID-19 and coronavirus collection page, where you can find plasmid tools to accelerate your COVID-19 research.... Download the blue plasmid background.     You can find all of the plasmids that Addgene offers by visiting... visiting our collections page. Here, you can browse plasmids by field, organism, research technique, ...from Addgene are shipped as bacterial stabs? You can learn about what format your material will come as...

  15. A New Generation of Adenine Base Editors Improves Editing in Primary Human Cells

    Type
    Blog Post
    Published
    May 7, 2020, 1:15 p.m.
    ...mediate A•T-to-G•C base changes (Figure 1), but it can be challenging to make these base changes, especially... in action they bind DNA so that the TadA domain can edit the short single-stranded DNA stretch that is...catalytically impaired D10A nickase from ABE7.10 can be a problem. Therefore, the authors created ABE8...protospacer adjacent motif (PAM) made up of 5′-NGG-3′ (“N” can be any nucleotide base, followed by 2 guanines). ... in primary human cells  Cell therapy approaches can use base editors to correct mutations in stem cells...which cause sickle cell disease and 𝛽-thalassemia, can be mitigated with the expression of fetal hemoglobin...plays a role for off-target editing effects. ABEs can be introduced into cells as a plasmid or as mRNA ...

  16. Rabies and Neuronal Tracing

    Type
    Blog Post
    Published
    May 29, 2018, 1:51 p.m.
    ...this post, I’ll describe how rabies virus (RABV) can be used in the brain to visualize how neurons are... this, cell type specificity of the starter cell can be achieved by using EnvA-pseudotyped RABV, and only...in user-defined cells. For example, a researcher can deliver Cre-dependent TVA to Cre-expressing neurons...it is supplied in trans. Monosynaptic RABV spread can be achieved by modifying the wild-type RABV genome...Wickersham et al., 2007). Thus, RABV transsynaptic spread can be controlled by selectively supplying the G protein... Once in first order neurons, the G-deleted RABV can divide and replicate (since these processes are mediated...RABV monosynaptic tracing is a powerful tool that can be used to reveal brain circuitry, and continue to...

  17. Viral Vectors 101: Gamma-Retroviral Packaging Systems

    Type
    Blog Post
    Published
    Aug. 6, 2024, 1:15 p.m.
    ...provides the widest tropism or range of cells a virus can infect. Note: While both lentiviruses and γ-retroviruses...modify tropism. Briefly, different envelope plasmids can direct the production of virus with various tropisms...HIV for lentivirus). Additionally, γ-retroviruses can only transduce dividing cells because they are only... breakdown of the nuclear envelope. Lentiviruses can transduce both dividing and non-dividing cells because...plasmids or the packaging cell line. γ-Retroviruses can transduce target cells, but the transduced target...Are γ-retroviruses self-inactivating (SIN)? They can be. Plasmids that encode SIN γ-retrovirus lack most...widespread use of γ-retroviruses (gamma-retroviruses) in cancer and stem cell research has prompted the development...

  18. Antibodies 101: Isotypes

    Type
    Blog Post
    Published
    Oct. 19, 2021, 1:15 p.m.
    ...places they can’t reach on their own. The antibody’s heavy-chain constant domains, or Fc region, can be bound...isotypes. Binding to complement system proteins, which can initiate a cascade that helps attack extracellular...useful to know the isotype of an antibody so you can select an appropriate isotype control. An isotype...There are two IgA subclasses: IgA1 and IgA2.  You can learn more about isotype classes in our Antibodies... constant domain gene cluster. DNA recombination can delete intervening heavy-chain constant domain genes... antibodies Read about other techniques that you can use antibodies for in our Intro to Antibodies post...

  19. Hot Plasmids - March 2019 - Anti-CRISPR, 2in1 Cloning, Fluorescent Voltage Indicators, and Photoswitchable Proteins

    Type
    Blog Post
    Published
    March 19, 2019, 1:31 p.m.
    ... indicator. Archon1 can embed itself into the cell membrane where cell voltage can then be measured. Archon1...rapidly screen thousands of proteins for one that can report electrical activity via imaging. They took...nature, but developing them into optogenetic tools can be difficult because this requires detailed structural...interactions in cells because the protein binders can be customized for protein visualization, relocation...these photo-reversible protein-protein interactions can control subcellular localization processes in vivo...

  20. Clear and Accessible Writing

    Type
    Blog Post
    Published
    Feb. 15, 2024, 2:15 p.m.
    ...More importantly, you can use these four steps for any type of writing. You can use them to help you write...accessibility is removing barriers when we can and lowering them when we can’t. We know barriers exist in scientific...and after ultracentrifugation so that a scientist can extract virus from the correct layer.  Third, think...Where is the reader accessing the information? This can be physical or digital. For instance, you would present...results. And many journals accept alt text, so you can submit it with your manuscript and help make your...
Showing: 421 - 440 of 898 results