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...targeted cell ablation via ROS is achieved through localized expression of the FAP. A new photosensitizer:...the main advantages of MG-2I-dL5** over other genetically encoded photosensitizers is that it works with... ROS because NIR light doesn’t excite natural biological chromophores found in cells.  He et al also show...compared MG-2I-dL5** head-to-head with KillerRed, a genetically encoded red fluorescent photosensitizer protein...Watkins, S. C., . . . Bruchez, M. P. (2016). A genetically targetable near-infrared photosensitizer. Nature...Chepurnykh, T. V., . . . Lukyanov, K. A. (2005). A genetically encoded photosensitizer. Nature Biotechnology...

...Musicophilia includes case studies of relevant neurological atypicalities, including a patient with amusia - the...capture the attention of even the most skeptical reader of historical fiction (I can personally attest to...Science is a terrifying and equally good wake up call about the science of race."     - Joanne Kamens,...Strange & Mr. Norrell by Susanna Clarke "A quasi-historical/fantasy fiction. Two dueling magicians in the...

... from their original sources. Figure 1: Biological repositories that distribute mouse strains, plasmids... plasmids, cell lines, and much more have been critical for pandemic research. Image from Reproducibility...Cell Bank, part of the National Institutes of Biomedical Innovation, Health, and Nutrition in Japan. These... available to scientists around the world. This scale of production and distribution is possible due to...research, and mechanisms to maintain and grow these critical organizations should be a fundamental part of ... SARS-CoV-2 and SARS-CoV with implications for clinical manifestations, transmissibility, and laboratory...

... Social distancing? Many people are now calling this “physical distancing” since it’s important to stay...resources collated by Addgenies to help you keep calm and science on. Practice self-care and stay connected...in these is a great way to support your favorite local exercise spot or find something new. We usually ...message for some people. We should recommend #PhysicalDistancing. Social interactions and #social support ... COVID-19. You can also give back by supporting local businesses (ex: purchasing a gift card to use later...

... transcription on the array have limited the scalability and efficiency of multiplex gene editing. Moreover... fused base editors (nCas9-BE), as Cas9 is mechanistically more favored for efficient base editing. They...been used for multiplex Cas9-nuclease editing. Typically, a single array encoding the tandemly assembled...released by endogenous tRNA processing machineries, specifically, RNaseZ and RNaseP. Although the Gao Lab demonstrated...loci MPE with similar high efficiencies, which is scalable for a higher number of MPE. Therapeutic potential...drive and process the tRNA-gRNA arrays, which is scalable and efficient in plasmid and viral vectors. In...

...algorithms are trained on vast amounts of data to calculate the relative immunogenicity score (Mattei et.al... evaluation of ‌therapeutic immunogenicity is typically performed using traditional 2D assays with immune...inform decisions about in vivo application and clinical testing. This would pave the way for improved ...in Macaca fascicularis: From Manufacturing to Preclinical Studies. In J. Bluemel, S. Korte, E. Schenck,...F. Weinbauer (Eds.), The Nonhuman Primate in Nonclinical Drug Development and Safety Assessment (pp. 519...2016). Antidrug Antibody Formation in Oncology: Clinical Relevance and Challenges. The oncologist, 21(10...

...many opportunities available to those who are scientifically minded! Listen to Biotech Founder Michael Koeris...required Research skills The ability to think critically and carry out in-depth research is applicable...Scientific Advisor Lab Manager Patent Lawyer Technical Writer Meteorologist Journal Editor Textile ...organised, reliable, and can work independently. Practical outdoor skills are needed in a variety of roles...Breeder Scientific Illustrator Plant Breeder Zoological Worker Conservationist Documentary Director ...range of roles, including: Science Reporter Technical Writer Statistician Bioinformatician Science...

... Connie Cepko (Harvard Medical School), and Dr. George Church (Harvard Medical School) for taking the ...environment? Does the group expect each other to be physically present at certain times during the day? We asked...history in science. Potential graduate students typically go through a rotation, which reveals their working...job satisfaction (especially for scientists and technical people) is linked to engagement and access to ... "chaotic" and offer less micromanaging, they typically offer more flexibility in choosing direction of...

...such as plasmids) into mammalian cells, a process called transfection. Transfection is somewhat comparable... way. Selection methods, described below, are typically employed when creating stable cell lines and are...respectively). Therefore, it is not always mission critical to make sure the plasmid replicates in the cell...   ***The concentration used for selection is typically more (double) than that used for maintenance of...usually achieved by performing a "kill curve" (basically growing cells in various concentrations of the...resistance; however, like gentamicin, neomycin is typically used to suppress bacterial growth. The selection...

...manipulating interneurons using a viral approach Genetically modified organisms like transgenic mice are important...a synthetic red fluorescent protein variant they call mScarlet. Bindels et al used a combination of deliberate... cell physiology and molecular processes via genetically encoded proteins. PhoCl is a new member of this... such as an NLS or NES, enables control over localization. Inserting PhoCl between an enzyme and an inhibitor...experiment, check out our recent guest blog series: A Practical Approach to Choosing the B(right)est Fluorescent...investigated an aspect of telomere length regulation called telomere trimming and have proposed a role for ..., Li and colleagues observed endogenous TZAP localization at telomeres and found that TZAP binds directly...

...variables - your approach, your workflow, or your physical setup - to prevent the mistake, just like you ...differently.  Tools to Try  Checklists Found in surgical suites, air fields, and military bases, checklists...light-sensitive reagents” or “re-sterilize now.” Have a physical copy of the protocol when you work and make a ...time to do them carefully and thoroughly. Have a physical copy on hand as you run your experiments. Try ...your plate maps onto your plates, alongside your physical copy. If you’ve got messy handwriting, reach for...accuracy.  Bench setup Small adjustments in the physical organization of your workspace and your workflow...

...specific subcellular localization peptide. By combining three different localization peptides with four ... for example).  Given that the liver is an immunologically active organ, this advance is likely to afford...off-target mutations. These plasmids contain catalytically inactive dCas9 and microbial SSAPs (dCas9-SSAP...system. dCas9-SSAP will make the editing of kilobase-scaled sequences more efficient and less risky.   ...plex mixed-subclone system using mStrawberry, localization peptides, and reporters that drive the expression...

...lower-energy photon; no chemical reaction takes place. Figure 2: Simplified chemical reaction catalyzed...American firefly, Photinus pyralis, catalyzes a chemical reaction in its abdomen to produce yellow-green...bioluminescence, is the production of light by a chemical reaction. In contrast, fluorescence occurs when...BioRender.com. Bioluminescent reporters require a chemical substrate (and sometimes cofactors) to be provided...   Luminescence Fluorescence Source of light Chemical reaction High-energy photons Kinetics of photon...

...This process is called α-complementation. The system described above was put to practical use in the following...well-characterized bacterial lac operon contains a gene called lacZ that encodes for the enzyme β-galactosidase...β-galactosidase enzyme can break down a dye-linked substrate called x-gal (5-bromo-4-chloro-3-indolyl-β-D-galacto-pyranoside...deleting a section from the lacZ gene (a mutation called lacZΔM15) creates a non-functional β-galactosidase...Providing DNA encoding this section of amino acids (called the α-peptide) to a lacZΔM15-mutant bacterial cell...

...proteins yet they still share many of the same technical advantages that come with working with prokaryotes...mutation. Yeast expression plasmids used in the lab typically contain all the necessary components to allow ...are small independent chromosomes and are thus typically found as a single copy. Unlike the ARS vectors...promote replication.  Selection markers for yeast Historically, scientists have utilized auxotrophic selection...plasmid may be expressed at higher than normal physiological levels due to high copy numbers. This creates...the presence of the selection marker at non-physiological levels. Scientists have tried varied approaches...

...composed of four peptide chains (two identical heavy chains and two identical light chains) each with a constant...antibodies means that it is relatively easy to physically divide up the different regions, both through...joined by a linker peptide, resulting in a product called a single-chain Fragment Variable (scFv). Size: ...samples more efficiently and can also improve localization accuracy when used in super-resolution microscopy...David vs. Goliath: The Structure, Function, and Clinical Prospects of Antibody Fragments. Antibodies 8(...

... audience and convey your ideas clearly and strategically is powerful in almost any career. It allows ...my head. What came out, though, was an incredibly calm: “Excuse me, I seem to have lost my place. I need... the open windows in the middle of your talk. Technical difficulties turn your slide deck into a chalk...everyone! Everybody makes mistakes, encounters technical difficulties, and runs into unexpected stumbling..., to a group of peers who are there to provide critical feedback, often with a semi-international audience...your own native language. And, at least in the biomedical field, with very little text on the slides and...

...limitation and allows for the flexible design and small scale production of antibodies. Problems with antibodies...instead of via recombinant DNA, they can’t be genetically tagged and instead are conjugated to reporters...labeled tyramide molecule into a highly reactive radical, which is then covalently linked to residues within...however, compatible with most multi-labeling immunohistochemical protocols where either a directly labeled... required for detection RANbody is detected enzymatically with HRP substrate More sensitive than detecting...RANbodies) as versatile, small, sensitive immunohistochemical reagents. PNAS. PubMed PMID: 29440485. Additional...

...your knowledge at local schools. Or work as a guide in local museums, zoos or botanical gardens. You can...unusual setting: Discuss your latest research in a local pub at a Pint of Science event. Or get on stage ...to reach young people? Try networking with your local education community. Get involved in education advocacy...communication organisation like Building with Biology. Local environmental groups, charities and NGOs are often...

...very useful in the event that you will not be physically present at your poster at all times, so other...readers can navigate your poster and follow the logical progression of your work, and you can accomplish...offers free poster templates, although most are vertical.  Large central box. Another commonly used and...presentation. Portrait. This style displays a poster vertically rather than horizontally. Instead of displaying.... Shapes. In this type of poster, written and graphical information are inserted into larger circles or... or ovals, that are arranged in some logical pattern across the poster. This style has the advantage of...

... have a quiet place to take your video call.  Expect technical difficulties. To try and circumvent this...ago. I just recently started working in the pharmaceuticals industry after earning my Master’s in 2016 ...presentation as an opportunity to demonstrate technical and transferable skills that make you qualified...perfect science talk Be prepared for potential technical difficulties. Have your presentation on a flash...from HR carefully. And even if you don’t have technical challenges, your interviewers might.  You’ll probably...

... be used for measuring protein expression or localization in cells, or even single-particle tracking of...named according to the number of strands in the canonical beta-barrel structure. Most frequently, the proteins...fluorescence complementation analysis under physiological conditions. Shyu et al. Biotechniques. 2006 ...fluorescent proteins as tags and biosensors for multiscale imaging. Shcherbakova et al. Nat Commun. 2016...split-FP options. While the BiFC interaction is typically irreversible and requires some time for chromophore...

...Mother Nature’s toolbox. Natural plasmids, also called environmental plasmids, are all around us! A plasmid...carrying genes for bacterial toxins like colicin typically also carry the necessary resistance genes to help...cells survive their own secretions. Pro tip! Historically, colicin-producing plasmids have been referred...which strains of E. coli contain this F plasmid is critical for successful Gateway cloning. In addition, scientists... Vogel, T. M., & Simonet, P. (2001). Laboratory-scale evidence for lightning-mediated gene transfer in...Characteristics and Potential Applications in Biotechnology. Critical Reviews in Biotechnology, 24(4), 155–208. https...

...histone-derived peptide) which can localise the construct specifically to the histone protein of interest...becomes. This prevents the cellular machinery from physically interacting with the genes in the compacted region...grandchildren; in this study,epigenetic changes were statistically significantly associated with reduced life-span... Chi-Wang, Cindy Y. Jao, and Alice Y. Ting. "Genetically encoded fluorescent reporters of histone methylation...methylation in living cells." Journal of the American Chemical Society 126.19 (2004): 5982-5983. PubMed PMID:...

...several ways. Below is a table listing some of critical differences (adapted from Zhou and Melton, 2008...this process. Moreover, it is much easier to genetically modify cells during the reprogramming process...This opens up a wide range of possibilities in clinical situations. In cases where the objective is to...Kushi) Mukherjee is the Editor of Trends in Pharmacological Sciences, a Cell Press reviews journal. She...from Massachusetts General Hospital and Harvard Medical School. Connect with her on LinkedIn @ https://...PMCID: PMC2854424. 23. Burridge, P.W., et al., Chemically defined generation of human cardiomyocytes. Nat...pluripotent stem cells via temporal modulation of canonical Wnt signaling. Proc Natl Acad Sci U S A, 2012....

...systems. FPs have been used to track protein localization, cell structure, intracellular trafficking, ...tagged proteins can lead to improper protein localization, protein aggregation, or disruption of normal...Also, it remains challenging to screen for the genetically modified strains that contain your newly tagged...recently developed a modular plasmid assembly toolkit called SapTrap to improve CRISPR genomic tagging in C....Protein Tagging. Beyond simply monitoring protein localization and activity, CRISPR tagging systems can be ...endogenous proteins for studying protein expression, localization, and protein-protein interactions. Additionally...

...domain fragment derived from a camelid antibody called a heavy chain antibody (HCab). Because of their...their small size, nanobodies can be synthetically expressed off of plasmids in bacteria, and they can target...enables rapid selection of synthetic nanobodies, called sybodies, against membrane protein targets in as...with a large and diverse pool of sybodies that hypothetically contain ones that bind strongly to your target... identifying sybodies that bind strongly and specifically to the protein of interest. The Seeger lab used...van Schie L, Hoffmann M, Pöhlmann S, Graham BS, Callewaert N, Schepens B, Saelens X, McLellan JS (2020) ...

...antibodies for every potential new target and basically impossible if you wanted to distinguish between...C-terminus post-translationally, which turned out to be critical for antibody recognition. As such, the peptide...interest and proteins tagged with it needed to be chemically treated before the antibody could detect them...investigating mechanisms of endoplasmic reticulum localization, Munro and Pelham casually introduced the Myc-tag... recognized by its antibody without additional chemical modification steps and when the epitope was within... of new versions of Myc1-9E10 mentioned above basically involve taking the Myc1-9E10 variable regions ...

... editing. Specifically, these types of CRISPR systems work using a multi-Cas complex called Cascade (CRISPR-associated... Cas3. Cas3 can induce genomic alterations on a scale that other Cas effectors can’t, while maintaining...recruit Cas3, which carries out the brunt of the mechanical work for editing. Class 1 CRISPR systems make...unraveling the double-stranded DNA (dsDNA) in what is called a reeling mechanism (see next section for details...debilitating disease! This is, of course, only hypothetical at this point. More time and energy must be ...

...Chavez, researchers at the Wyss Institute for Biologically Inspired Engineering. CRISPR/Cas9 technology...has facilitated the development of a simple and scalable means of making targeted genetic edits. Cas9 is... a gene of interest, they have been shown to dramatically alter levels of expression. Cas9’s ability to...Lance-Byrne is a graduate student at the University of California, Santa Cruz, where her research is focused on...Orthogonal gene knockout and activation with a catalytically active Cas9 nuclease." Nature biotechnology ...Options for CRISPR Genotyping Cas9 Activators: A Practical Guide Additional Resources on Addgene.org Check...

... the pharmaceutical industry for years. They have proven very difficult to target therapeutically due ...however, have yet to slay the beast. On a global scale, tens of millions of new cancer cases arise and ...fit. Kevan Shokat’s group at the University of California, San Francisco, is approaching the Ras problem... cancers, and synthesizing compounds to bind specifically to their mutated residues. For Ras researchers...represented, making the results of any such study as clinically relevant as possible. Connecting the research...

...delivery methods below: Chemical transfection   Lipid mediated Cationic polymers Calcium phosphate Cells... some CRISPR mammalian expression systems, the typical applications for each, and potential delivery methods... or introducing mutations and tags, while a catalytically dead dCas9 can be used in conjunction with activator... be constitutive or inducible. U6 promoter is typically used for gRNA. May contain reporter gene (e.g....Medium Medium Medium Difficulty Easy Easy Easy Physical transfection   Electroporation / Nucleofection...

...is certainly not the first means to carry out so-called “forward genetic screening experiments”, it is ...in a particular phenotype. CRISPR can be readily scaled up for genome-wide screening due to the broad range...experiments you use them for! A well-developed biological question and experimental system are absolutely... to skewed results. Selecting a cell type - Theoretically, any cell type can be used in a CRISPR screen...screens check out Addgene’s 2016 publication “Practical Considerations for Using Pooled Lentiviral CRISPR...McDade JR, Waxmonsky NC, Swanson LE, Fan M (2016) Practical Considerations for Using Pooled Lentiviral CRISPR...

...neuroscience research is the lack of a method for genetically manipulating neurons throughout the whole brain...CNS and PNS.That is until the Gradinaru Lab at Caltech stepped up to the challenge. Find the PHP Plasmids...astrocytes. Why screen for IV deliverable AAVs? Typically AAVs are directly injected into the brain, but...throughout the body and is often difficult to surgically access. Therefore an IV injection is an ideal...pictures (see figure 4). It also enables single-cell anatomical study and neuronal tracing, aka determining where...mechanistic studies and gene therapy treatments for neurological diseases). The Gradinaru Lab has a lot going...

...immunoprecipitation (enChIP) using CRISPR." Biochemical and biophysical research communications 439.1 (2013):...genomic alterations. These studies utilize a catalytically inactive form of Cas9 known as dCas9 (Jinek ...interactions at this site (Fujita and Fujii, 2013). They call this method engineered DNA-binding molecule-mediated...begun to make important discoveries in various biological fields. In 2015, the Fujii Lab identified non-coding... Fujita, Toshitsugu, et al. "Identification of physical interactions between genomic regions by enCh IP‐Seq...

... non-scientist friends and family is Part Five, called simply “Bad Science.” Zimmer kicks off the section...science, or misuse science, and that is what I would call bad science.”  The three chapters in this section...Zimmer provides several. In Part Three of the book, called simply “Old Science,” he describes the now infamous...are “old,” they lead Zimmer to one of his most critical observations: “Today the most successful scientists...optogenetics and CRISPR of course address some of the ethical implications of using these technologies, but also... certainly still is and will continue to be a “critical consequence of ...the marginalization of science...

...Thanks to the Beer–Lambert law, the instrument can calculate a sample’s nucleic acid concentration based on... reading, distorting the final concentration calculation and potentially impacting downstream experiments...in many plasmid purification kits), which can dramatically reduce the A260/230 ratio at concentrations ...systems to better identify contaminants and to calculate corrected concentrations. However, such systems...sound techniques, routine machine maintenance, and critical interpretation of the results.  If you see evidence...1ea8aec3bfa24543a28fcaea25986514.ashx. Koetsier G and Cantor E. A Practical Guide to Analyzing Nucleic Acid Concentration ...

...using a mammalian production system, cell lines typically used include Human Embryonic Kidney (HEK) cells...also need to know the extinction coefficient to calculate the concentration. At 280 nm, the extinction coefficient...protein standard and the concentration may be calculated using imaging software. Any bands on the gel ...validated to ensure they bind their antigens specifically. Possible applications for validation include...Sellick C, Varley P, Rockberg J, Chotteau V. Small-scale bioreactor supports high density HEK293 cell perfusion... MS, Carpenter JF, Lengsfeld CS. Do not drop: mechanical shock in vials causes cavitation, protein aggregation...

...  Ampicillin Ampicillin, often just called amp, is the historical king of the antibiotic resistance realm... antibiotic resistance genes so that you can specifically isolate bacteria containing your constructs ...immediately after it has been heat-shocked or electrically zapped. As a result, a shorter recovery period... of antibiotics, which induce cell death by intercalating into DNA and generating DNA breaks. The Sh ble... antimicrobial agents in MIC trays. Journal of Clinical Microbiology, 23(5), 959–961. https://doi.org/...

...the bacterial population. But what if we could specifically target only virulent or antibiotic resistant...antibiotics by their suppliers, and public health and medical organizations are working to help educate the public...encoded by a high-copy plasmid. In the case of the genomically encoded quinolone resistance, mediated by a single...represented here by cells of different colors, specifically targets bacteria with the given genomic or plasmid...Yosef et al. suggest that it could be valuable in medical settings where antibiotic resistant bacteria have...narrow bacterial host range. To further potential clinical applications, Ando et al. recently engineered ...