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  1. How to Prepare for an Industry Interview

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    Blog Post
    ...reason you can’t then ask that same question in your next interview. The same goes for answers interviewers...interview questions. Story telling shares many of the same elements as a STAR answer: a setting, a conflict...pay attention. Your interviewers will not have the same experiences as you, so set them up for success by...and your interviewers. You’re probably all in the same boat, but there are a few things you can do to make...
  2. Better Dyeing Through Chemistry & Small Molecule Fluorophores

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    Blog Post
    ...removing excess dye from the sample, which is particularly important for samples where washing is difficult...reason is something called “the photon budget”: each sample has a limited number of fluorophores and each fluorophore...of information one can extract from a biological sample is wholly dependent on the photon budget and pushing... desperate to extract a few more photons from a sample. Chemical fluorophores can be substantially brighter...
  3. Viral Production at Addgene

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    Blog Post
    ...of the viral capsid proteins VP1, VP2, and VP3. Samples of viral preparations are subjected to polyacrylamide...proteins as a fraction of total protein present in the sample is also determined and used to determine purity...shown relative to the total protein present in the sample.   Sterility Viral vector preparations are ...rigorous barcode matching system that follows the sample from the DNA tube all the way to the cleared viral...throughout production, ensuring the identity of each sample from the DNA tube all the way to the viral preparation...
  4. Antibodies 101: Beyond Surface Labeling

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    Blog Post
    ...FACS achieves greater purity of your sorted cell sample than MACS. An effective strategy to sort out your... T cells (Figure 2). Even better, we can use the same fluorophore for the three lineage markers we have...gating labels all unwanted cell lineages with the same fluorophore to easily gate on the unlabeled cells...different while the permeabilization solution can be the same). Examples of such targets include transcription...undesired cell populations. Dump gating uses the same color for different markers, making it easy to gate...
  5. Viral Vectors 101: AAV Variables That Matter

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    Blog Post
    ... different phenotypes of the same cell type, are intermingled in the same brain nucleus: a serotype that...tropism between animal species or even strains of the same species. What works well in a mouse may not work...doi.org/10.3390/cells12050785 Murlidharan, G., Samulski, R. J., & Asokan, A. (2014). Biology of adeno-...10.3390/pharmaceutics13050750 Murlidharan, G., Samulski, R. J., & Asokan, A. (2014). Biology of adeno-...
  6. Fluorescent Proteins 101: History of Fluorescent Proteins

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    Blog Post
    ...phenomenon wasn’t until much later when, in the 1960s, Osamu Shimomura studied the bioluminescent properties ... of the coast of Washington state. Using these samples, he was able to isolate two proteins from the jellyfish... fluorescent proteins with new colors Around the same time, researcher Sergey Lukyanov realized that, ...organisms to find the culprits. He even obtained samples of certain ones from local pet shop aquariums in...
  7. Phage Directory: From Phage Therapy to a Repository of Phage Information

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    Blog Post
    ...should receive the clinical sample to test their phages. Because the sample is limited, only the labs that...bacteria and sometimes, only a subset of strains of the same bacterial species are affected. As of now, phage...targeting organisms closely related to the clinical sample. For treatment, it is best to identify a cocktail...
  8. What's the Best Way to Elute and Store Your Plasmid DNA?

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    Blog Post
    ... last step will influence the stability of your sample over time and determine which experiments you can... impact the time you will be able to store your sample without having substantial degradation and which... DNA, it will limit what you can do with these samples. This is because divalent cations are essential...reaction, an effective possibility is to dilute your sample in water to reduce the EDTA concentration. Alternatively...
  9. Fostering communication in remote collaborations

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    Blog Post
    ...asynchronously. The best way to keep everyone on the same page is to make communication a non-negotiable part...meeting, but short enough that everyone stays on the same page. Ideally, these meetings include all collaborators...documents While having multiple scientists edit the same document may sound like something out of your nightmares...or ensure that techniques are being performed the same way at different sites. I did a lab exchange as ...
  10. Plasmids 101: Walkthrough of Addgene’s Snapgene-Powered Quality Control Process

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    Blog Post
    ...features and it allows you to more quickly identify the same feature in other plasmids. Aligning sequences with...allows us to quickly align multiple sequences at the same time. This means we can easily compare and analyze...Snapgene-powered plasmid maps and sequences use the same feature detection software as the desktop version...analyze the sequence data in depth. You will see the same features annotated in our plasmid maps, including...
  11. Plasmids 101: Origin of Replication

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    Blog Post
    ... plasmids with the same ori are incompatible because they will compete for the same machinery, creating...unpredictable environment. As a rule, plasmids from the same group should not be co-transformed, so if you need... an arbitrary designation, and plasmids from the same incompatibility group should not be co-transformed...
  12. Intro to Our Summer SciComm Series!

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    Blog Post
    ...good communication is making sure everyone’s on the same page. So for our first post, I thought it best to...communication by and to scientists in (roughly) the same field, often through manuscripts, seminars, or posters...PCR test” to mean “a test that uses a biological sample to look for presence of a virus.” A scientist would...consistent and clear.   And now that we’re all on the same page, we’re ready to get into the more exciting ...
  13. Learning Technical Skills at a Lab Central Workshop

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    Blog Post
    ... aim to do large scale DNA preps with multiple samples without cross contamination. We currently use the...create a DNA library, one must first fragment a DNA sample into many small components. Without proper processing...process with, we got great amplification of our sample libraries. NEB also gave us a few goodies which...my first blog post! I highly recommend doing the same if you ever go to a workshop because it will help...
  14. Antibodies 101: Monoclonal Antibodies

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    Blog Post
    ...Monoclonal” refers to antibodies that are all of the same isotype and specificity. In other words, monoclonal...recognize the protein even though it is present in your sample. Additionally, there is a lower likelihood that...antibodies that recognize many different epitopes on the same protein - are more likely to have off-target effects...produces high-affinity/high-avidity antibodies. The same hybridoma is then used to produce all lots of the...
  15. Plasmids 101: Methylation and Restriction Enzymes

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    Blog Post
    ... experiment? The answer to both questions is the same--methylation! Read on to learn about how DNA methylation...companion endonucleases that recognizes and cleave the same DNA sequence if not methylated (if it comes from...Although not all prokaryotic DNA is methylated to the same level, the potential for methylation should be considered...any) of those sites will be methylated. Using the same example plasmid as above (which has the XbaI site...
  16. How to Keep a Lab Notebook for Bioinformatic Analyses

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    Blog Post
    ...that you are in fact using the same data for all of your analyses. The same is true for scripts. Naming...files in a separate folder: You will often use the same data files for multiple analyses. Rather than copying... script as originalName_descriptionOfEdit in the same directory where it was run. This technique leaves...
  17. AAV Q&A with Tim Miles

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    Blog Post
    ... A: It is our understanding that AAV-BR1 has the same genome size restrictions as other AAV. Therefore...somewhat more reliable quantitation. Differences in sample treatment across methods can affect reported titer...that users keep titering method consistent across samples within a project. Targeting Your AAV Q4: Are there...of co-delivering different AAV particles into the same cells in vivo? A: This will be highly dependent ...
  18. Behind the scenes: Addgene’s new search engine and more

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    Blog Post
    ...this information, however, did not improve at the same pace as the quantity and quality of the information...mechanism to “collapse” variations and synonyms of the same term that appear in our data into a single filter... Matching We capture multiple variations of the same information in our search indices in order to support...depositor field will rank higher than matches of the same name in the publication field. Suggestions We provide...
  19. Giving gRNAs a Facelift - Synthetic and Beyond

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    Blog Post
    ... when scientists talk about their precious RNA samples. RNA is inherently less stable than most macromolecules...CRISPR-Cas9 experiments – the “gRNA” – suffers from the same issues as your experimental RNA. To solve this problem...Another stabilizing sugar modification, found at the same site, is 2’-fluoro (2’-F), which substitutes a fluorine...protein and can increase on-target efficiency. In the same vein, locked nucleic acids or bridged nucleic acids...
  20. New Tool for Lineage Tracing: The ClonTracer Library

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    Blog Post
    ...replicates would contain the same labels - i.e. they would always come from the same parent cells that represent...replicate groups, and treated these groups with the same drug regimen, they would find one of two outcomes...population (all barcodes can be amplified using the same sets of forward and reverse primers). The abundance...
Showing: 141 - 160 of 581 results