Skip to main content

We narrowed to 858 results for: CAL

Showing: 441 - 460 of 858 results
  1. Supporting Reproducibility with a Connected ELN

    Type
    Blog Post
    Published
    Jan. 17, 2019, 1:38 p.m.
    ... this post I’d like to delve deeper and look specifically at the characteristics and capabilities an ELN...facilitate true reproducibility. The following are critical: (1) connectivity to other data sources used in...likely stored in institutional and lab servers specifically designed to hold large amounts of data. Although...group’s research – it makes no sense and is not practical to move all this data in bulk into a lightweight...lightweight tool like an ELN. It is nevertheless critically important to be able to conveniently reference specific...
  2. CRISPR 101: Targeting RNA with Cas13a (C2c2)

    Type
    Blog Post
    Published
    Sept. 21, 2017, 2:07 p.m.
    ...post was updated on Jul 27, 2020. CRISPR, and specifically Cas9 from S. pyogenes (SpCas9), is truly an ...specified by the crRNA sequence, it adopts an enzymatically “active” state rather than reverting to an inactive...propensity of Cas13a to bind and cleave RNA non-specifically. The ability of dCas13a to bind target RNA without...modulating splicing, and regulating expression of specifically targeted RNAs. Finally (and perhaps most interesting...observed shRNA off-targets. They subsequently used catalytically inactive dLwaCas13a as a programmable RNA-binding...
  3. To Codon Optimize or Not: That is the Question

    Type
    Blog Post
    Published
    Nov. 12, 2020, 2:15 p.m.
    ...expression limiting regulatory elements or use a non-canonical code (Gustafsson et al., 2004), such as Hoogsten...recognize multiple synonymous codons) may actually be critical for determining the rate of translation. The ribosome...10.1101/gr.139758.112 Mauro VP, Chappell SA (2014) A critical analysis of codon optimization in human therapeutics... GluCl ion channel genes for mammalian cells dramatically improves expression levels. Journal of Neuroscience...synthetic? How Addgene;s dataset reveals trends in biological innovation Resources on Addgene.org Check out...
  4. Bioinformatics at Addgene

    Type
    Blog Post
    Published
    July 14, 2022, 1:15 p.m.
    ...In Addgene’s early days, we would ‘spot-check’ critical regions of plasmids deposited with us via Sanger...development teams, frequent updates allowed us to scale our lab work as we grew. As the number of deposited...us to switch between executing our pipeline on a local computer or in a cloud environment. Given the throughput...jumping back and forth between running the pipeline locally and in the cloud. Creating a bioinformatics workflow...script file (containing our new process) on our local computer. Eventually, our workflow would handle ...
  5. New CRISPR Tools: Cas7-11 and PASTE

    Type
    Blog Post
    Published
    Feb. 17, 2022, 2 p.m.
    ...experimental design and its potential for clinical applications. Specifically, efficacy rates of Cas7-11 were reported...current knowledge. The Abudayyeh-Gootenberg lab (also called the AbuGoot lab), a joint lab run by Omar Abudayyeh...originally suspected that this new Cas7-11 might be phylogenetically classified as the more complex Class I systems...switched up the serine integrase for one which can enzymatically take a genetic sequence and integrate it into...
  6. "Hall of Fame" AAV Enhancers from the Allen Institute for Brain Science

    Type
    Blog Post
    Published
    Sept. 9, 2025, 1:15 p.m.
    ...administered systemically (retro-orbitally, RO; or intracerebroventricularly, ICV) or locally (stereotaxically...developed, funded, and shared has no doubt changed drastically over the past few decades. But no matter how ...and transgenic mouse lines for genetic access to cortical cell types. Cell. https://doi.org/10.1016/j.cell...
  7. Harnessing TnpB for Genome Editing: A Compact and Versatile Tool for Your Research

    Type
    Blog Post
    Published
    July 29, 2025, 1:15 p.m.
    ... an exciting class of compact genome editors, typically only around 400 amino acids in size. To give a...target DNA, TnpBs also need a short sequence motif called a TAM (transposon-associated motif), which is positioned...familiar targeting mechanism. Small RNA elements called right-end RNA (reRNA) or omega RNA (ωRNA) guide... a single experiment (Karmakar et al., 2024). Practical Guide: Using pK-TnpB1 and pK-TnpB2 Vectors The...The process for cloning the 20-nt guide RNA is identical for both vectors. Here, we provide a step-by-step...
  8. Tips and Tricks for Using Golden Gate Modular Cloning (MoClo)

    Type
    Blog Post
    Published
    July 8, 2025, 1:15 p.m.
    ...allows for directional assembly of DNA sequences, called modules or parts. Assembly is dictated by four-...for fresh bacteria. Performing your Assemblies Calculate your volumes As you progress through the MoClo...increase your ligation efficiency, we recommend you calculate the right volume of each plasmid according to ...the equation in Figure 3.    Figure 3: Calculation for the plasmid volume for MoClo experiments....high-throughput, we recommend transforming into chemically competent cells in a 96-well PCR plate. Always...
  9. Plasmids 101: Shuttle Vectors

    Type
    Blog Post
    Published
    May 20, 2025, 1:15 p.m.
    ...production of viral vectors typically involves shuttle vectors, also sometimes called transfer vectors. The ...antibiotic works. Another example is Zeocin, a DNA intercalator, which affects all kingdoms of life. Of course...host range plasmids shuttle vectors? While it’s technically accurate to say that shuttle vectors have a “... “broad host range,” these terms are typically used in different (though overlapping) ways. Broad host...
  10. CRISPR 101: Any Base Transversion Editors

    Type
    Blog Post
    Published
    April 1, 2025, 1:15 p.m.
    ...product purity of 66%. Pro tip! Abasic sites are also called apurinic or apyrimidinic sites and abbreviated ...are the same protein!) (Chen et al., 2024). They called their initial editor AXBE, for A → X base editor...in a G → Y (Y = T or C) base editor, which they called glycosylase-based guanine base editor (gGBE) (Tong... Therapeutics team has deposited their editors, called gTBE and gCBE, with Addgene. gTBE can introduce...site A DNA site with the nucleobase removed. Also called an apurinic / apyrimidinic (AP) site. UNG / UDG...
  11. Plasmids 101: Plasmid Incompatibility

    Type
    Blog Post
    Published
    March 31, 2020, 1:15 p.m.
    ...molecules, forming a “handcuff” structure that physically blocks replication machinery when plasmid copy...It is also worth noting that plasmids can be symmetrically incompatible, meaning that both plasmids are... from the cell with the same probability, or asymmetrical, where one plasmid lost from the cell at a higher...deal with the more sinister plasmids of the microbiological world. (Want to know more about these plasmid...high copy incompatible plasmids that lead to asymmetrical plasmid loss of the usually large, low copy ...
  12. Viral Vectors 101: Pseudotyping

    Type
    Blog Post
    Published
    April 20, 2021, 2:30 p.m.
    ...JAT, Callaway EM (2007) Monosynaptic Restriction of Transsynaptic Tracing from Single, Genetically Targeted...Why pseudotype? Lentiviruses and retroviruses typically target immune cells with their wild-type envelopes...out this review article published in Reviews in Medical Virology (Li et a., 2018).   Figure 2:...6178.1997 Wickersham IR, Finke S, Conzelmann K-K, Callaway EM (2006) Retrograde neuronal tracing with a deletion-mutant...
  13. CRISPR-based Genome Editing Systems For Editing in E. coli

    Type
    Blog Post
    Published
    April 13, 2021, 1:15 p.m.
    ...studying biochemistry at the University of Southern California. He is also an intern at the Yang Lab of the ...transposon-encoded CRISPR/Cas systems in bacteria, specifically on optimizing strains with low efficiency.   ...of Sciences. He joined Shanghai Institutes for Biological Sciences in 2000 and became a professor in Synthetic...reprogramming of cells to understand the genetic and biochemical mechanisms behind their distinct phenotypes and...generation of engineered cells for green chemistry and biomedical applications.   Yiwen Zhang entered the Sheng...
  14. Tips for Using FRET in Your Experiments

    Type
    Blog Post
    Published
    Nov. 5, 2014, 3:41 p.m.
    ...FRET during a journal club, my guitarist brain automatically thought about the raised element found on the...interactions in living cells using a microscope. Historically, molecular interactions were detected by indirect...know or interact with each other. FRET reduced the scale of our perception about molecular interactions. ...Periasamy defined FRET as "a distance-dependent physical process by which energy is transferred non-radiatively...FRET) microscopy imaging of live cell protein localizations. J Cell Biol. 2003 Mar 3;160(5):629-33. ...
  15. SARS-CoV-2/COVID-19 Detection Methods Based on CRISPR/Cas

    Type
    Blog Post
    Published
    May 5, 2020, 1:15 p.m.
    ... RT-qPCR tests to diagnose COVID-19 and some serological tests to determine past exposure. However, the...rapid detection.  Highlights: Cas13a is not catalytically active in the presence of two or more mismatches... copies RNA targets in a 40 min incubation. A scalable, easy-to-deploy, protocol for Cas13-based detection...available and less expensive. Instead of using the typical PCR machines, the authors use affordable, field-ready..., Acosta-Alvear, D., & Wilson, M. Z. (2020). A Scalable, Easy-to-Deploy, Protocol for Cas13-Based Detection...
  16. Transferable Skills Guide: Conflict Resolution

    Type
    Blog Post
    Published
    Jan. 4, 2022, 2:15 p.m.
    ...set of transferable skills, coupled with your technical skills, can open new career opportunities for ...conflict can also be good. In science, a reviewer’s critical comments on your manuscript is a form of (hopefully...scientist. And some amount of conflict is actually critical in the business world. Companies and organizations...aspects of customer support each team “owns” is critical for day-to-day operations and keeping our customers...especially people with whom you strongly disagree, is a critical component of conflict resolution. Having empathy...
  17. Evolution of Brainbow: Using Cre-lox for Multicolor Labeling of Neurons

    Type
    Blog Post
    Published
    April 24, 2015, 2:39 p.m.
    ...insights into the complicated physical organization of the brain and other biological systems. Interested in ...deletions are defined using 2 loxP variants (only identical loxP sites can mediate recombination.) The deletions... preventing further recombination. Brainbow-1.1 scales up the system to four fluorescent proteins, with...homeostasis results from neutral competition between symmetrically dividing Lgr5 stem cells. Snippert HJ, van der...
  18. Generating Mouse Models Using CRISPR/Cas9

    Type
    Blog Post
    Published
    July 12, 2016, 2:30 p.m.
    ...without their problems, but much genetic and physiological data have been accumulated over the years using...check out our Mouse Modeling blog posts: Part 1: Genetically Engineered Mice and Part 2: Breeding and Crossing...into the oviduct of pregnant females, a technique called Genome editing via Oviductal Nucleic Acids Delivery...small mutations with HDR, when it comes to larger scale genome editing, such as replacement of a mouse gene...nice to your microinjectionist, who has the strategically important job of delivering the payload! Last...
  19. Addgene Protocols Go Viral: AAV Purification and Titration

    Type
    Blog Post
    Published
    June 13, 2019, 12:19 p.m.
    ...lab, or tissue culture as it is commonly called, is a critical tool for many scientists. Mammalian cells...AAV preparation. For detailed instructions and calculations on how to prepare a plasmid stock used to generate...cells provide scientists with the means to study biological processes on the cellular level instead of having...
  20. Tips for Working in Industry & Success in Management: Interview with Crystal Shih

    Type
    Blog Post
    Published
    Oct. 5, 2017, 1:13 p.m.
    ...completing her PhD in Chemistry and Chemical Engineering with Harry Gray at Caltech, Crystal moved on to a Postdoc...Investigator III at Novartis, a multinational pharmaceutical company based in Switzerland. After completing...scientific teams at the Novartis Institutes for BioMedical Research to develop novel biologics for the treatment...
Showing: 441 - 460 of 858 results