...You’ve prepped your DNA and you’re ready to get started on the next step of your experiment. But in many...through a liquid to determine the concentration of substances in the liquid. Molecules absorb different wavelengths... methods, fluorescence-based methods require a standard curve, a set of samples with a known DNA quantity... a fluorometer to quantify DNA this way. First, start by pouring your gel containing a DNA intercalating...microarray studies and is not used as much for the standard plasmid prep. Diphenylamine method Another absorbance...made in the visible range and can be read with a standard ELISA reader if no other instruments are available...

...says Bachle. (For presenters, there’s also less stage fright!)And depending on the conference, the audience... questions,” says Zhang. “Usually the moderator starts by asking the speaker the highly upvoted question... the app or virtual platform and making sure you stay connected. If possible, test out the technology ...conference begins.“There were some concerns of having a stable internet connection,” says Abitua about her workshop...chats between sessions or waiting for a session to start. “There was not much time to network,” Zhang says...discussing at tables and the event hasn't even started yet! @neurosymp will be interesting this year. ...

...worked with many Addgenies to help improve the understanding, curation, and explanation of our CRISPR resources....” Doench’s graduate work helped expand our understanding of how miRNAs regulate their targets and what...screens to answer their own research questions. Starting at the Broad Institute For his post-doc, Doench... technology development alongside it.” Doench starting working with David Root in the then RNAi Platform...left him a bit skeptical of the technology at the start of the CRISPR craze, but he says, “In the case of...Involvement with Addgene Although Doench’s thorough understanding of CRISPR is what got him involved with Addgene...

...cells treated with MG-2I dye and exposed to light stained dead within 30 minutes of exposure. 90 seconds ...killing of dL5** cells without death of neighboring bystander wild-type cells.   Zebrafish experiments with ... 2). Induced cell death was confirmed by TUNEL staining.  The video below shows what happens to the zebrafish...as Mg-2I-dL5**. Mg-2I-dL5** also had higher photostability than KillerRed, with KillerRed reaching greater...ablation while having limited collateral damage to bystander cells. Are you ready to use MG-2I-dL5** with your... D. M., Britanova, O. V., Yanushevich, Y. G., Staroverov, D. B., Chepurnykh, T. V., . . . Lukyanov, K....

...suppression (and most everything in between), understanding how, when, and where TFs work is of broad interest... 3,500 human TF isoforms, to help researchers understand this regulatory network. The transcription atlas...fates. The atlas of directed differentiation To understand how each human TF can contribute to differentiation...endeavor, a map of possible TF-induced cellular states was generated (Joung et al., 2023). Fig....screening approach can not only lead to a better understanding of disease onset, but also better simulate a...is a valuable reference if you are looking to understand a pathway, or just looking for the best astrocyte...

...fascinated by the human body and how it works. I used to stay up past my bedtime, poring over my grandparents’...science made me happy, but it wasn’t long before I started becoming disillusioned with the gulf between what... BSc in Anatomy, the University of Otago had established the Centre for Science communication and I was...in neighbouring disciplines might struggle to understand. Why should we trust something that we cannot...know and believe about the world. It is vital to understand what people know – or, at the very least, believe... the National Academy of Sciences of the United States of America, 114(36), 9587-9592. doi:10.1073/pnas...

... red channel fluorescence images of C2C12 cells stably expressing pTRE-Tight-MitoTimer and rtTA. The cells...shRNA. This system requires less work than using established methods and minimizes some of the technical issues...the CRUSH vector in transgenic mice, the lab established a dual-color RNAi “sensor” mouse strain in which... mapping and electron microscopy A thorough understanding of complex biological systems requires both ... found at Addgene, so what are you waiting for? Start building up your own designer bacteria. St-Pierre...number of libraries containing pre-constructed standardized modules. In the first assembly step, compatible...Nicola Patron have assembled two collections of standardized genetic modules compatible with the MoClo system...

...why the results you've measured should change established theory. So, what can you do to ensure that your...increasingly available. But think of this as a jumpstart or a refresher for your skillset rather than a... asks a question about something they did not understand about your presentation, question whether other...scientists need to communicate with non-scientists, to establish broader impacts for their work in education and...our attendees there online with #comscicon18 and stay tuned to our website and social channels to apply...organizations that practice science communication or start your own! When you do, let us know!  To get in touch...

...recombination found in E. coli, SLIC is a cheap, standardized, and rapid multi-part DNA assembly method. Read...on to learn how to use it in your research! The starting point: Ligation-independent cloning Ligation-independent...nucleotide, T4 will switch to polymerizing and then stall due to the absence of the other dNTPs. Once the ...of DNA!) Figure 1: Schematic of SLIC. To start the SLIC cloning process, a gene of interest is ... SLIC can’t be used if the overhangs would have stable ssDNA secondary structure — for example, the stem-loop...enzymes required for Gibson assembly. SLIC is a standardized method for multi-fragment DNA assembly, and ...

...your actual samples. They may also be used as a starting point for compensation (Fig. 1B-C). However, it... The single color controls should be used as a starting point, to preserve your sample, and you should... compensation (C) with APC-Cy7.   FMOs FMO stands for fluorescence minus one. It is used as a negative... samples, combine it into one well or tube, and stain it with every marker you are using in the experiment...and be in the same fluorophore (e.g., if you are staining for anti-mouse Ly6C in APC with the IgG2c subclass...a combined subset of your experimental samples, stain it with every marker you are using in the experiment...

...mechanism by which bacteria have gained antibiotic resistance and virulence. Scientists have studied how HGT... Guillemin, 2006) or the presence of specific substances (Meibom et al., 2005). Though not all bacteria... replication-incompetent phage particles with assistance from a ‘helper’ phage prior to transduction. ...expressed but not integrated into the genome and stable cell lines, where foreign DNA is incorporated into...can infer genetic advantages such as antibiotic resistance. Bacterial conjugation as explained by... genetic material can pass through. If you are starting any molecular biology experiment check out Addgene...

...rigorous QC standards are met, we are taking a unique hybrid approach compared to our standard pipeline....samples, the rest will be put into a status we call “Archived.” This status allows us to store plasmids and...pipeline. For the first ~50 plasmids we perform our standard full plasmid sequencing by NGS. Addgene’s QC scientists...contain all expected features and meet our QC standards. If any concerns are identified, we can quickly...

...practices (QRPs) can quickly lead us to find statistically significant results that are not robust. Sampling...Preregistration is the process of creating a time-stamped research plan in a public repository before conducting... is typically done right before data collection starts, and should include a specific plan for how data...each hypothesis will be tested with a specific statistical test.  Preregistration makes clear the distinction...to present that work using hypothesis testing statistical tools that generate a p-value.  As an example...sampling noise with registered reports, the gold standard for testing hypotheses Finally, Registered Reports...

.... To get started, you will first need a primer that complements your plasmid sequence. Start with a backbone-specific...plasmid, you’ll need a way to find the needle in the haystack: the one perfect clone that contains the plasmid... lost a specific gene survive (ex: antibiotic resistance marker). In a previous blog post, we covered ...plasmid backbone, as it often relies on antibiotic resistance. But what about identifying clones that contain...Lynne Postovit’s lab. It contains an ampicillin resistance marker in the backbone. A selection on agar containing...

... attention on transcription factors, starting with an established method called ChIP-seq. ChIP-seq relies...explains it, a major goal in his laboratory is to understand the function of the non-coding portion of the...transcription factor. It also gives cells antibiotic resistance to neomycin so that you can select the population...We’ve done comparisons of our new system versus standard ChIP-seq for transcription factors known to have...available to anyone for a modest cost without having to start all over or write to us to get them. Even though...

...don’t have a background in statistics and programming, you’d be wise to start working on these skills. ...techniques from across different disciplines to better understand neurobiology and human cognition. Developing ...interaction between neuroscience and other fields. For instance I met one researcher studying how the microbiome... apply your knowledge of metabolism to better understand how aberrations in brain biology lead to altered...always suggest a plasmid to us, request that we start making the AAV, or help us produce new educational...

...Cas12a for multiplexed gene perturbation The Penn State Protein Ladder Engineered miniature CRISPR-Cas system...anti-HA frankenbodies (Zhao et al. 2019), Tim Stasevich and Hiroshi Kimura’s labs have recently published...onto a well-folded scFv scaffold to improve its stability in cells, and use it in a variety of applications...complementarity determining region of an anti-FLAG scFv and a stable scFv scaffold. (b) Schematic of anti-FLAG-FB-GFP...2021. doi: 10.1038/s41587-020-0600-6. The Penn State Protein Ladder  by: Rachel Leeson This simple, inexpensive...expression and purification. Figure 3: The Penn State Ladder run on SDS-Page gels. A: individually expressed...

...Konermann explained, was new knowledge about Cas9’s crystal structure. “I thought maybe we could use information...genes that, when turned on, make melanoma cells resistant to treatment with a BRAF inhibitor. (The test ...system and contains 10 sgRNAs for each transcription start site in 15,977 human genes. The transcriptional ...library contains 10 sgRNAs for each transcription start site in those 15,977 human genes. Weissman and his...manipulated at one time. Weissman’s group has made standard protocols available and they are working to further...gene, go to http://sam.genome-engineering.org/. Crystal structure of Cas9 in complex with guide RNA and...

...elsewhere (here and here for instance) [2], [3]. Karl Deisseroth of Stanford University , one of the key...neuroscience research where optogenetics will be a standard tool used in nearly any neuroscience project or...Intramural Research Program (NIH-NIDA IRP), with the stated goal of learning behavioral optogenetics in order...been published at this point.  In brief, some standard opsins (see table above) include Channelrhodopsin2...silence neurons than HR. Delivering your opsin  The standard opsin delivery method is local injection of an...considerations for your optogenetics experiments. Stay tuned!  Many thanks to our guest blogger Derek ...

...blots, for instance, almost always use the indirect approach, while flow cytometry’s standard approach ...targeting the Fc region of an antibody, the so-called ‘constant’ region which is, quite usefully, both conserved...cannot recommend it except in the most dire of circumstances.) Multiplex assays Mo’ proteins, mo’ problems... antibodies used are mouse IgG antibodies, for instance, an anti-mouse secondary will bind to all the ...flexibility in assay development. Researchers who understand how and why to use secondary antibodies will ...