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  1. Plasmids 101: Secondary Nanobody Toolbox

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    Blog Post
    ...for your work. Species Antibody Subclass Nanobody Addgene Plasmid Rabbit N/A* TP897 pTP1183 (1x... one IgG subclass.   Express the Nanobody In Bacteria: Table 2 also has a link to the plasmid you’ll need... How to Use the Nanobody Toolbox Find Nanobody Plasmids Structural comparison As the name suggests, ...different species, or at least from different IgG subclasses, so that secondary antibodies exclusively recognize...Must use different species and/or different IgG subclasses of 1° for multi-color staining Can be expensive...limited cross-reactivity between different IgG subclasses and different species, nanobodies are useful ...require using primary antibodies from different IgG subclasses. Instead, you can pre-incubate individual primary...
  2. Top Requested Plasmid of 2017 - pMD2.G

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    ...example (the top requested plasmids from 2015 and 2016 were CRISPR plasmids), but so are lentiviral vectors...reason, the top requested plasmid of 2017 is the lentivirus envelope plasmid pMD2.G from Didier Trono’...Plasmid technologies are constantly evolving, but sometimes a technology is so useful it forever enhances...’s lab! Lentivirus envelope vector pMD2.G This plasmid has been requested nearly 6,000 times (over 800...the broad usefulness of pMD2.G and VSV-G. This plasmid has been used in studies of the secretome, ubiquitin...to check out the Trono Lab website. If you have plasmids you’d like to deposit with Addgene, be sure to...Who knows, maybe yours will be the top requested plasmid of 2018! Additional Resources Quick Guide to ...
  3. Making CRISPR Plasmids Using Fragmid

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    Blog Post
    ... work out of the plasmid creation process. Each module of Fragmid represents a class of components, such...restriction digest, and then plasmid sequencing if you can. To quote Doench, “Whole plasmid sequencing is just ...correctly banded clones for plasmid sequencing and found 98% of the plasmids were perfectly correct. Because... Mammalian Plasmid pRDA_791 (contains only orio and ampR) Drosophilia Plasmid pRDB_051 (for...the assembled plasmid. It shows you each component, with the ID of the component plasmid, component name...the component plasmids on the Addgene website. Step 4: Naming your assembled plasmid and generating... is to your liking, your last step, Step 4, is to give the assembled plasmid a name and generate the vector...
  4. Plasmids 101: Stringent Regulation of Replication

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    Blog Post
    ...replication. In general, these plasmids tend to be low copy number. Conversely, plasmids that can initiate DNA ...growth against sustainability. Plasmid DNA replication and regulation Plasmids must also strike a balance:...a given plasmid has been reached, negative feedback circuits reduce replication of the plasmid to balance...balance the total plasmid number.  Let’s consider pSC101. This plasmid is stringently controlled and has...promotes initiation at the plasmid ori, after which replication of the plasmid proceeds (and terminates)...tool to stringently regulate plasmid replication. For example, the plasmid ColIb-P9 encodes the protein...All plasmids rely on their host cell's replication machinery in order to replicate—but not always to ...
  5. How to Deposit Your Plasmids with Addgene

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    Blog Post
    ...Unpublished or pre-publication plasmids": Unpublished plasmids or plasmids that will not be published are...and entering a plasmid name,plasmid type, and plasmid description/experimental purpose (right). On the...with your plasmids, and adding all the plasmids at once increases the likelihood that the plasmids are given...easy for you to share plasmids. To achieve this goal, we will archive any plasmids you've deposited with...Spreadsheet". Start your plasmid deposit There are two options to begin your plasmid deposit. Figure 2: Choose... Choose to submit plasmid(s) online or by using a spreadsheet. The plasmid information can be entered ...than 10 plasmids but we recommend using the spreadsheet option for deposits of 10 or more plasmids.   ...
  6. Plasmids 101: Codon usage bias

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    Blog Post
    ...mutation” field on the plasmid page (see plasmid 87904 for example). As many plasmids available from Addgene...blog Plasmids 101: protein expression Plasmids 101: E. coli strains for protein expression Plasmids 101...codon optimized by ordering plasmids containing them from Addgene. If a plasmid at Addgene contains a gene...
  7. Celebrating One Million Plasmids Shared!

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    Blog Post
    ...a million plasmids would fill? Two weeks ago, Addgene edged passed our one million plasmids shared milestone...ending the day with 1,000,002 plasmids shipped. Reaching one million plasmids shared might have you wondering...how many plasmids leave Addgene headquarters every day. That would be an average of 673 plasmids each day...to packing and shipping. Every single day. 673 plasmids shipped daily may be easy to picture (see the ...celebratory lunch, it’s hard to picture one million plasmids. How much space would one million bacterial stabs...Leadership team in all their photo booth glory! #1millionplasmids On to the next million! @CarolineBME @AllostEricSite...post, we looked at how long it takes to make one plasmid and how much time Addgene has saved researchers...
  8. Plasmids 101 eBook 4th Edition

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    Blog Post
    ...popular eBook, Plasmids 101, is now available!   Plasmids 101 covers everything from plasmids parts and ...word for it!  “When people want to learn about plasmids, they don’t go to Wikipedia; they go to Addgene...
  9. Visualizing Your Plasmid Request Data

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    Blog Post
    ...insight to the most requested plasmid, the number of requested plasmids, or trends of requests over time...website, allowing depositors to download their plasmid request data, as a CSV file, anytime. The CSV is... Visualizing the data So, after downloading my plasmid request data, I started to explore how I could ...file is open for anyone to use.  View the Addgene Plasmid Request Data Dashboard! Figure 1: The ...
  10. The time and cost required to make a plasmid

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    Blog Post
    ...cost required to make a plasmid. In 2023 (and at closer to 2 million plasmids shared than not!), we think...great Plasmid Debate of ’18, Blue Flame depositor John Doench calculated the time to make a plasmid. Doench... make a plasmid? Doench also calculated the cost of consumable reagents used to make a plasmid, which ... to make plasmids that already exist, and we significantly reduce costs of producing plasmids with high-throughput...lot of plasmids, it’s almost always faster to order from us!) Ask the PI If you want a plasmid for free...high-throughput” Instead of making one plasmid at a time, try constructing several plasmids in parallel. That way, you...collection pages to more easily find plasmids Search for a plasmid in Addgene’s repository ...
  11. Plasmids 101: The protein expression toolbox

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    Blog Post
    ... a gene (cDNA) can be done by either plasmid or virus. A plasmid carrying your cDNA can be targeted for...resources on the Addgene blog Plasmid 101: Inducible Promoters Plasmid 101: Repressible Promoters CRISPR...knock out. Looking for some permanent knock out plasmids? Check out our Cre vector and Murine LoxP vector...of protein expression. Addgene has a dCas9 KRAB plasmid for transient knockouts!  Turn it on Turn it on...
  12. Plasmids 101: Using Transposons in the Lab

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    Blog Post
    ...move antibiotic resistance genes between plasmids or from plasmids to the bacteria’s genome. In humans, if...elements are split into two classes based on their mechanism of transposition: Class I TEs, also called retrotransposons...rest of this article. Class I Transposable elements (TEs): Retrotransposons  Class I TEs are also known...retroviruses, like HIV, replicate. Class I TEs do not encode a transposase enzyme.  Class I TEs are considered replicative...Created in BioRender.com.   Class II TEs: DNA transposons Class II TEs are also known as DNA transposons...the key components of transposons, how they are classified, and how they are used in the lab. What is a ...retrotransposons, and Class II TEs, also called DNA transposons. DNA transposons are commonly used as tools...
  13. Selecting Your Plasmid Purification Kit

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    Blog Post
    ...your plasmid; separate plasmid DNA from unwanted cellular “debris”; and then clean-up the plasmid DNA ...debris from the plasmid, and then clean-up the plasmid so that you are left with pure plasmid DNA. Image created...post-consumer recycled plastic Reduced plastic in buffer bottles Fewer plastic consumables Fewer pipette... help you choose the plasmid prep kit that is right for you. What type of plasmid prep do you need? As...As we covered in a previous post on plasmid preps, not all plasmid preps are the same. Your downstream...arise during the plasmid purification process. One is the possibility of damaging the plasmid DNA itself, ...carrying over contaminants from the plasmid prep process into the final plasmid eluate. Possible contaminants...
  14. CasPEDIA: A Functional Classification of Cas Enzymes

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    Blog Post
    ...exact Cas9 plasmid used by Jinek et al. 2012, or browsing for the latest AsCas12a plasmids, Addgene and...). CasPEDIA Database: A Functional Classification System for Class 2 CRISPR-Cas Enzymes [Preprint]. Biochemistry...al. (2019). Evolutionary classification of CRISPR–Cas systems: a burst of class 2 and derived variants....searchable resource that provides summary information on Class 2 Cas enzymes. The information is organized in wiki...intended applications. Within CasPEDIA, there is a classification system, CasID, to help facilitate direct comparison...find a link to search Addgene's collection for plasmids containing that enzyme, and embedded in the References...lists on every page you can find direct links to plasmids from the article if they're available through ...
  15. Troubleshooting Your Plasmid Cloning Experiment

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    ...Browse our Plasmids 101 blog posts Read blog posts on plasmid cloning Read about different plasmid elements...to the backbone plasmid; a starting point could be a molar ratio of 1:2 (plasmid:insert), but this parameter...colonies screened might not contain the correct plasmid. There’s a lot that can go wrong! With all the ...cloning project, and hopefully obtain your coveted plasmid with no substantial delays. Design, design, design...spend some time outlining the construction of the plasmid and all the steps you will have to take. Decide...you chose, and verify that the sequence of the plasmid you are working with is correct. It's also best...ways you can assemble the different parts of a plasmid based on the cloning strategy you followed. While...
  16. Plasmids 101: Methylation and Restriction Enzymes

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    Blog Post
    ... expression. Methylases involved with these processes (for example Dam and Dcm methylases) are independent...contain 3 methylases that recognize and methylate different stretches of DNA: Dam methylase adds a methyl... of DNA Dcm methylase adds a methyl group to the second cytosine of CCWGG EcoKI methylase adds a methyl...desired mutation into your plasmid of interest by PCR generates mutated plasmids with no methylation (there...Mutagenesis to Mutate Your Plasmids Resources on Addgene.org Check Out Our Plasmid Protocols Boost Your Molecular... for purposes other than cloning or confirming plasmids. It turns out that restriction enzymes are one...followed by TC. As shown in the figure below, a Dam methylase recognition site (underlined in red) overlaps ...
  17. Plasmids 101: Terminators and PolyA signals

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    Blog Post
    ...Download our Plasmids 101 eBook to get all the background you need to start working with plasmids! What are...Techniques Read all of our Plasmids 101 Posts Resources on Addgene.org Browse our Plasmid Reference Pages Just...Plasmids designed to express genes in a given host cell type are generally broken down into two broad...based on the functional elements they contain. Plasmid DNA in both prokaryotic and eukaryotic systems ...Rho-dependent terminators are not usually employed in plasmid-based expression systems, so these will not be ...the end.  Nearly all common bacterial expression plasmids use Rho-independent terminators, which include...termination with polyadenlyation. Mammalian expression plasmids are primarily used to create mRNA and the commonly...
  18. Addgene's Tips for Plasmid Quality Control

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    Blog Post
    ...sequence analysis, plasmid verification, and using NCBI BLAST. Tips for high-throughput plasmid sequencing If...sharing plasmids through Addgene is that we provide an added level of confidence in the plasmids we distribute...ensuring plasmid quality is to stay organized. Here at Addgene, we collect data on every plasmid we distribute...cloned into the plasmid) and any other important features that differentiate this plasmid from its predecessor...for the inserts or the full plasmids. This will enable you to quickly BLAST your sequencing result against...on the Addgene Website View our Plasmid Reference Pages Get Plasmid Backbone Information from Our Vector...distribute through our quality control processes. Every plasmid we receive is rigorously verified before becoming...
  19. Your Top Requested Plasmid in 2015!

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    Blog Post
    ...from our repository to find our most requested plasmid in 2015. In line with all of the exciting developments... past year, we're excited to announce that the plasmid most requested from the Addgene repository in 2015...put to such great use. It’s just one of the many plasmids being distributed to and accelerating research...Knockouts Read Some Common Ways to Deliver CRISPR Plasmids to Mammalian Cells Resources on the Addgene Website...Visit our Lentiviral Guide Pages Find Lentiviral Plasmids Find CRISPR Pooled Libraries ...
  20. 28 Hot Plasmid Technologies from 2015

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    Blog Post
    ...amazing plasmid technologies developed by our community of depositors. With over 40,000 plasmids avaliable...amazing new plasmid tools that have come through our doors in 2015. Do you have a favorite new plasmid tool ...system plasmids are available through Addgene and are already very popular. Use these plasmids to increase...luciferase-fluorophore pH fusion reporters, pRSETb-pHlash and pcDNA3.1+-pHlash, that use Bioluminescence Resonance Energy...Characteristics of the pHlash reporter protein include: H+ specific response cytoplasmic retention insensitivity... can visualize: Cell Structure Plasmids: Cell Structure Plasmids: ER mCherry-Sec61 beta BFP-Sec61...bound to it). Classically it has been easier to overexpress the POI-tag fusion from a plasmid or from a random...
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