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...institutions set their postdoctoral salary scales to the NRSA scale (Figure 21, National Postdoctoral Association...addition to certain staff scientists and those in technical roles. Therefore, institutions are responsible...suggested that the salary level should now be automatically adjusted every 3 years. In May 2016, Secretary...requirements of the FLSA. In the University of California system, the postdoc union has negotiated a raise...likely the number of postdoc positions in the biomedical enterprise in the U.S. will decrease. At Future...has clearly not been a sustainable approach to biomedical research in the U.S. and postdoctoral training...academic system is increasing, and becoming ever more critical. In 2016 not only were postdocs not exempted from...

...preference.   Historically, ICSS was done by implanting an electrode and non-specifically electrically stimulating...the steps and technical considerations are directly applicable to the rat [6]. Technical differences include...[2]. Laser activation is usually controlled automatically using motion capture software such as EthoVision..., regardless of the type of behavior, certain technical considerations still apply. Testing stimulation...is wrong or 2) there is some problem with the technical implementation of your optogenetics setup (viral.... 8.Han, Xue, et al. "A high-light sensitivity optical neural silencer: development and application to...

...signals from these reporters. Lack anatomical context/spatial localization: In vivo imaging with fluorescent... be overlaid onto anatomical ultrasound imaging to show where the bacteria localize in relation to internal...ultrasound fingerprint can be detected. Bourdeau et al calls this method acoustic collapse.  Importantly, acoustic...exciting application for ARG’s: in vivo imaging. Specifically, arg1 expressing E. coli aided in ultrasound...intestinal tract and has been used for 100 years to clinically treat enteric infection and inflammatory bowel..., but lux imaging shows only that the bacteria localize to somewhere in the mouse abdomen. arg1 signal...

...2012) scFv Antibody: Principles and Clinical Application. Clinical and Developmental Immunology 2012:1...being smaller than antibodies. scFvs are often genetically fused to other proteins, which has led to their...with 10-24 copies of the short epitope GCN4, also called a scaffold; and 2) a GCN4 binding scFv that’s fused...is easier and cheaper to generate since it’s genetically encoded.   Translational applications of scFvs...antibodies, there are many scFv-based therapies in clinical trials or already in the clinic (Bates and Power... tumour specific antigen. When these molecules, called Bispecific T-cell engagers (BiTE®s), bind CD3 on...David vs. Goliath: The Structure, Function, and Clinical Prospects of Antibody Fragments. Antibodies 8:...

...covered in detail here. Classical double-strand break repair (DSBR) In the classical DSBR pathway, the 3’...and Homology Directed Repair (HDR). NHEJ is the canonical homology-independent pathway as it involves the... provided the DNA template used for repair is identical to the original DNA sequence at the DSB, or it...plasmid, etc.), and consists of three pathways: classical double-strand break repair (DSBR), synthesis-dependent...purple arrows) or on the non-crossing strand (vertically at the orange arrows). If resolved dissimilarly...applicable in DSB-induced genome engineering, it has biological importance for the repair of breaks that lack...2281-308; (2013). PubMed. A Mouse Geneticist's practical guide to CRISPR applications. Singh P, et al. ...

...promoters and Shine-Delgarno sequences used in this so-called bicistronic design (BCD). The 49 vectors in this...: Čelešnik, Helena, et al. "Biosafety of biotechnologically important microalgae: intrinsic suicide switch... Rogers, Jameson K., and George M. Church. "Genetically encoded sensors enable real-time observation ... Ribosome-Controlled Fluorescent Reporter."ACS chemical biology 11.1 (2015): 31-37. pCri system The Gomis-Ruth...latency in matrix metalloproteinases." Journal of Biological Chemistry 290.8 (2015): 4728-4740. You can find...The gene set was carefully chosen to perform statistically relevant benchmarking of cell-free expression...Marx's lab has engineered and validated a new method called FREQ-Seq. This strategy allows scientists to construct...

..., soon directed himself to finding “immunological and virological solutions to crises like those and ended...Therapeutics, which was acquired by Ultragenyx Pharmaceutical in 2017. As one of the original employees at...learned more about Addgene. “The mission to share critical reagents such as plasmids and viral stocks for...depositor. KSQ uses a CRISPR-Cas9 platform to systematically test the function of all 20,000 genes in disease...Target Discovery at the Novartis Institutes for Biomedical Research. Drug development was something Stegmeier...genetics.” As a postdoc in Stephen Elledge at Harvard Medical School, he developed the first lentiviral microRNA-based...Associate Professor at Mass Eye and Ear and Harvard Medical School (HMS) where he leads a lab of 25 people....

...University of California, Irvine University of Massachusetts, Worcester  University of Nebraska Medical Center...University and Medical Center  Weizmann Institute of Science Whitehead Institute for Biomedical Research ...time of request MTAs and deposit agreements to basically instantaneous in many cases.  Suggest that they...your organization below? Don’t worry--we check periodically for possible new awardees, and we’re happy to...Hospital  Brandeis University  Broad Institute  California Institute of Technology Cold Spring Harbor Laboratory...University Rockefeller University  Salk Institute for Biological Studies The Scripps Research Institute St. Jude...

...Python script called SSFinder, but I find its implementation to be too slow for practical use. The R based...causes malaria). I attribute their success to technical expertise, thoughtful single guide RNA (sgRNA)...the piñata builders - the reviewers. After some physical exertion on the part of the party goers, the piñata...the other hand some software tools make use of empirically derived and/or prior knowledge to inform on the... Hsu et al., 2013) used a combination of both empirical and approximate methods. The details of their ...“high mismatch limit”, “approximate design”, “empirical design”, “single-PAM design”, and “multi-PAM design...sites, scores and the statistics that go into calculating them. For this, some online tools such as Cas-OFFinder...

...Talley Lambert, a Research Associate at Harvard Medical School. The need for a community fluorescent protein...one of the most indispensable tools in modern biological research.  Any microscopist will tell you that...maturation, oligomerization), many of which are dramatically affected by environmental conditions (such as... structure was needed.  It is also difficult to scale such a resource when updates depend on a single ...feature filter spectra and collection efficiency calculations.  With ~80 FP spectra (and rapidly growing, ...Talley Lambert is a Research Associate at Harvard Medical School. He manages the Cell Biology Microscopy ...Microscopy Facility, specializing in advanced optical microscopy. Follow him on twitter or github @tlambert03. ...

...quick turn-around time of Sanger sequencing have historically matched the needs of most molecular biology ...rapid advances in technologies that permit large-scale creation and synthesis (“writing”) of longer pieces... a collection of 96 plasmids on a plate) will typically have a wide range of input quantities. This variation...samples. As mentioned above, one of the primary technical benefits of plexWell™ is that normalized libraries... proprietary chemistry). This turns out to be critically important for getting adequate sequencing depth...via plexWell™ libraries is well suited to large-scale de novo assemblies of short constructs like plasmids...computational biologist with a passion for solving critical sequencing problems. He received his PhD in Bioinformatics...

...Arabidopsis (CIBN), which they call the LADL Anchor. Using specifically designed gRNAs, they can then ...Inducible Degradation (AID) uses plant hormones called auxins to conditionally and reversibly degrade ... for AID. By tagging proteins with a 7kD degron called mAID and expressing the essential plant protein...microorganisms based on metagenomic data. MerMAIDs (Metagenomically discovered Marine, Anion-conducting and Intensely...publicly available metagenomic datasets with biophysical studies and the potential of mining datasets ...transcription factors tethered to dCas9, require long time scales with constitutively expressed proteins that are...nature of genomic looping due to it’s briefer time scale and its inducible and reversible nature. Find the...

...scene. But what about the other yeasts – in the biomedical world, are there even other yeasts? In this blog...The most commonly used yeast by biotech and pharmaceutical companies is K. phaffii (formerly known as ...the system. Since then, multiple biotech and pharmaceutical companies (along with some research laboratories... bread. The following table lists some of the biological commonalities and differences between K. phaffii...the expression of recombinant proteins by the pharmaceutical and biotech industries as a protein expression...modification of recombinant protein products, specifically glycosylation. The native glycosylation machinery...human: The important gene co‑expression modules. Biomedical Reports 7.2 (2017): 153-158. DOI: 10.3892/br.2017.941...

...lentivirus and have been difficult to manipulate genetically. To solve this issue, Sarah Teichmann and colleagues...triglyceride or cholesterol contents (what is commonly called bad cholesterol). However, size distribution and...including quantification of abundance, size, and localization in vivo. The LipoGlo system represents a new... (bEBPs) at a sequence upstream of the promoter called the upstream activating sequence (UAS). The Wang...Communications, 2019. PubMed PMID: 31451697. Genetically encoded voltage indicators for use in worms Article... Article contributed by Brook Pyhtila Genetically encoded voltage indicators (GEVIs) change fluorescence...real time when neurons or muscle cells transmit electrical information. Such voltage imaging can be performed...

...form of many, many short DNA sequences called reads. Typically they’ll be in a file in FASTQ format, a...DNA is needed for screening experiments, so the scale of the DNA prep is larger. And since the library...all components of the library are represented. Typically, Addgene uses electrocompetent Stbl4 cells when...ensure a good transformation efficiency. For a typical library, Addgene usually does four to eight electroporation...product because the plasmids in the library are identical except for the insert; there’s no need to sequence...). You can also rank the plasmids by abundance, scaled to 1, to create a “cumulative wealth distribution...distribution” curve, or Lorenz curve. By calculating the area under the curve (AUC), one can gain a sense of the...

...different signals in a certain region or calculate a colocalization factor to assess the spatial relationship...microscope to see where the target protein is (localization) and how much there is (quantification). But...protein targets and you want to know if they co-localize at the same place in the cell? Or you know that...inactivate the fluorophores in the sample, either by chemical treatment or photobleaching or by stripping out...yourself stuck with red-green images generated automatically from the microscope software, you can always...it, the secondary antibody may be binding non-specifically – try optimizing your blocking and washing conditions... your multiplex-labeled sample to see if the localization and intensity patterns are similar between the...

...Castano Corsino, a junior faculty member at Harvard Medical School/Brigham and Women’s Hospital (BWH). Based...like IMP, bring closer than ever (although not physically) the ideas and experience from talented professionals... IMP USA-Europe not only provide the specific technical and logistic support to increase the chances of...professional opportunities that are outside of our typical boundaries, and will arrive to Spain at one point...international mentors. Universities from five different geographical locations in Spain were enrolled: the University...represented a diverse group of individuals with technical and career path needs, and came from the universities...this first program. Although not everyone got a physical award, all the students experienced great improvements...

...began with only a few inventory items offered domestically, but by the end of 2016, we expanded our viral...2014). It is a dual-vector system, meaning it is typically used in conjunction with a second vector that ...lentiGuide-Puro. The alternative single-vector systems typically express Cas9 and a gRNA from the same plasmid....several benefits. First, the low viral titers typically associated with Cas9-expressing lentiviruses will...Tips for using this plasmid Cas9 expression is typically cytotoxic, which makes generation of high titer...particular signaling pathways in specific cell types (typically neurons). While all of these viruses are popular...expressed in cells that express cre recombinase. Typically, this feature is used to attain cell-specific ...

...hM4Di was fused to mCherry. To investigate the localization of the hM4Di, we used primary antibodies against...allow a high-spatial resolution of the protein localization. Surprisingly our observations at the electron...expression of the transgene of interest and its localization in the membrane. The lesson we learned from ...Electron microscope images showing ultrastructural localization of hM4Di in monkeys. The pre-embedding immungold...arrows point, respectively, to gold particles localized in the cytoplasm or bound to the plasma membrane...However, in some cases the fluorescent signal may be critical for the experiment. Since the fused protein could...Research Center. Using a combination of in vivo and anatomical techniques, her research aims to gain a deeper...

...Table 2: Effect of Localization on Rosella’s fluorescence emission. Localization pH Emission Color ...improves upon them. Methods for studying autophagy Biochemical assays Long-lived protein degradation: This... Pho8Δ60 mutant protein is expressed. Pho8Δ60 localizes to the cytosol in an inactive form unless autophagy...’s slow and only measures bulk autophagy. Morphological assays Electron microscopy: Electron microscopy... tagging it with GFP allows for tracking the localization or accumulation of pre-autophagosomal structures...will emit red fluorescence regardless of its localization in the cell. SEP’s pH sensitivity means Rosella...color fluorescence Rosella emits based on its localization. Table 1: Summary of Rosella’s excitation and...

... mechanisms. Most take advantage of chemical groups intrinsically present on antibodies, such as the primary...Chemiluminescence, which is light produced by a chemical reaction, can be detected using specialized imaging...reactions produce a color change, so they are typically used in microscopy-based assays like immunohistochemistry...conjugates (especially if you start to consider clinical applications). But there are a few other classes...somehow be tightly linked to your antibody. This chemical coupling can be achieved through several different... made to antibodies, such as inclusion of non-canonical amino acids or peptide tags. 5) Strong protein-protein... productive lives without thinking about these chemical reactions. After all, there is an abundance of...

...through our lab using barcoded tubes and plates. The critical pieces of information for a given plasmid are ...plasmid sequence. Other information may also be critical to the maintenance and use of certain plasmids...for the process. Always sequence verify Once the physical sample and its associated information are at Addgene... but, in most cases at Addgene, we check what we call the “insert,” (the gene or genetic element cloned...recover around 750 bp of clean sequence from a typical reaction, or about 250 amino acids worth, so make...comparable success rates and sequence quality, which is critical for the efficient handling of large numbers of...glycerol stock to each of 2 96-well microplates (identical copies, see image above). We then select forward...

...Research at universities typically requires funding from a variety of government and academic institutions...to trusted students. For example, if the proposal call aligns with your work, your advisor may want to ...actively pursue. Proposal writing: Improves technical writing and communication skills, Elucidates...required for a successful grant application. It typically includes overview information, key dates, funding...proposal and deliverables to the aims requested in the call. Step 2: Develop a research plan Most grant applications...delivers strength to the sentence. Below are the typical sections in a NIH RFA, for example, and tips to...met in order to deem your proposal successful. Typical proposals consist of 3 to 5 aims, with secondary...

...many have called out antibodies as major culprits in the reproducibility crisis of biomedical research ...why validation is so important. Antibodies are a critical component of the researcher toolkit due to their...other strategies may not be feasible and (2) large-scale proteomic and transcriptomic datasets already exist...-out approach to show that an antibody binds specifically to the expected protein. Common approaches include...that you want to use to look at the subcellular localization of a protein of interest. Conveniently, you ...plasmid not encoding this protein, which we will call Negative Control Gene (NCG) (A). Then you lyse the...experiment and want to validate that your antibody is specifically capturing your RNA-binding protein of interest...

...follow the same general cyclical process (Figure 2). The differences typically come in when generating...student at Moffitt Cancer Center. Engineering usually calls to mind building things, lots of math, and maybe...machinery. But not all engineering is at a large scale — some is done on much smaller equipment on a lab...conducting antibody evolution experiments, you’ll typically go through this cycle many times, until you achieve...chop up your target sequences into fragments, typically using a DNase. Then you run a PCR without primers...Innovation (IPI) provides information on their large-scale recombinant antibody production platform. IPI is..., validated antibodies with verifiable data is critical, especially when sharing with other scientists...

...most Enterobacteriaceae. An update to this system, called pEcCas/pEcgRNA, allows it to be used in more E.... CRISPR-transposons. The Sternberg lab's system called INTEGRATE (Insertion of Transposable Elements by...-Assisted Targeting) and the Zhang lab's system called CAST (CRISPR-associated Transposase) both enable...eukaryotes (Qi et al., 2013). As in other systems, catalytically dead (dCas9) targeted to a promoter or gene ...gene body can repress transcription by physically blocking the elongation complex from binding the DNA or...responsive promoter to drive expression of a catalytically dead Cas9 enzyme allows reversible repression...Bikard et al., 2013). By targeting either a catalytically dead Cas9 (dCas9) alone or a dCas9 fused to ...

...classrooms, the laboratory experience is focused on classical embryology techniques such as basic observation... They also created an online companion resource called “cutting class” which provides more detailed materials...technique that detects the temporal and spatial localization of mRNA transcripts in tissue. This is useful... manipulation. The technique involves using synthetically made RNA (riboprobes) with modified nucleotides... added to the tissue. The last step involves a chemical reaction to stain the cells that contain this ...easily generate off of a circular plasmid via PCR. Typically, to make these constructs, developmental biologists...target mRNA and silences its expression. More specifically, during the process of RNAi, an enzyme dubbed...

...Almost all patients have achieved persistent immunological reconstitution with a normally functioning T...translating gene therapies from conceptual design to clinical trials involve identifying a therapeutic gene,...carcinogenic profiles have limited their usability in clinical settings. On the other hand, vectors derived from...Unlike most naturally occurring viruses used in clinical trials, wild type AAV is not associated with any...http://www.abedia.com/wiley/vectors.php). These clinical trials have been directed at diseases including...HIV. A notable landmark study showed significant clinical efficacy against a form of blindness known as ...rAAV2 carrying the human gene RPE65, patients with clinical diagnosis of LCA and mutations in RPE65 (n=3),...

...they perform complex biological tasks, both of which are factors in the technical challenges they can ...hail Marys that have helped me troubleshoot some technical obstacles when working with virus: 1. Viral vectors...Different titering methods can reveal differences in physical versus functional titer. If you have low titers...cells, replace the medium with half the volume typically used (e.g., use 5 mL medium on a 10 cm plate)....increase transduction efficiency. These reagents typically enhance the adsorption of a virus particle to ...measured with branched-DNA technology." Journal of clinical microbiology 37.6 (1999): 1683-1686. PubMed PMID... virus adsorption on target cell membranes." Biophysical chemistry 97.2 (2002): 159-172. PubMed PMID: ...

...cable is threaded through—and fixed to—an optical insulator called a ferrule (below). The fiber optic cable...maintained during the entire protocol, otherwise optical stimulation will be erratic, opsin activation/inactivation...stimulation parameters must also be determined empirically but it’s best to try those that have already ...flexibility in behavioral experiments. However, the technical demands of using these wireless devices are significantly... in cerebellar Purkinje cells. The Journal of biological chemistry. 2011;286(29):25848-58. doi: 10.1074... Sparta DR, et al. Construction of implantable optical fibers for long-term optogenetic manipulation of...PMC3466483. 4. Kim TI, et al. Injectable, cellular-scale optoelectronics with applications for wireless optogenetics...

...to your normal control - you can set up your calculations so that your assay output number (RQ value) ... In that case, an RQ value of one (or, more realistically, between 0.80-1.20) would mean you have one ... on and so forth. This also serves as a light technical control - an RQ value of 1.5 means you have either...incredible discovery. The range of RQ values used to call copy numbers should be as small as reasonably possible...all double-stranded DNA, while Taqman uses an intercalating dye, with a fluorescent probe and quencher to...). Sybr, therefore, cannot be used to accurately call copy numbers, though it has been shown to identify...all researchers. Accuracy needed Do you need to call exact copy numbers or just general trends? How confident...

...must make is which system you will use, or more specifically, the type of cells that will be used to make...spanning both prokaryotic and eukaryotic organisms. Typically, what system is used is dictated by the specific... one passage (transfection). This differs from typical insect cell preparations, which we talk about below... below. Processing The viral supernatant is typically collected over the course of a couple days to increase...supernatant will depend on the virus type. AAV is typically purified using methods like ultracentrifugation...produce baculovirus, a family of viruses that specifically infect insects. This is what makes insect cells...transfer plasmid and the baculovirus construct, called a bacmid. Like AAV and lentiviral packaging plasmids...

...smaller libraries, chemical transformations can also be used. Efficiency for chemical transformations is...expected transformation efficiency, or more specifically calculated based on the size of and weight of your...that of electroporation, but an advantage is that chemical transformations are generally cheaper and easier...easier. One library that Addgene distributes with a chemical transformation amplification protocol is the Chong... KB) Screening Rinehart Lab Iterative Synthetically Phosphorylated Isomers (iSPI) Libraries ~11,000...DOCX, 17 KB)   For CRISPR libraries, Genome-scale CRISPR-Cas9 knockout and transcriptional activation...

...Kusumika (Kushi) Mukherjee, editor of Trends in Pharmacological Sciences, a Cell Press reviews journal. Stem...differentiate into cells of peripheral blood. Typically, there is a very small number of ASCs in each ...Limited. Only specific cell types can be produced Ethical concern High. Embryos are destroyed during ESC ...of post-transplantation rejection when used therapeutically High Low (if ASCs are isolated from the patient...bypass the transplantation compatibility issues and ethical concerns of ESCs. As iPSCs can be sourced directly...directly from a patient’s adult cells when used therapeutically, the chances of post-transplantation rejection...Kushi) Mukherjee is the Editor of Trends in Pharmacological Sciences, a Cell Press reviews journal. She...

...graduate student culminated in my founding a nonprofit called Central Indiana Science Outreach, or CINSO. We ...public. My experiences in grad school, though often called “nontraditional,” helped prepare me to start CINSO...educating the public and organizing events. I contacted local professional organizations and nonprofits. I volunteered...nontraditional” career path long ago. Use your analytical mind to test and discover what career suits you...mistake, I evaluated what lessons I had learned – call it “troubleshooting.” Trying out new experiments...followers. It’s also been a great place to reach out to local establishments such as museums, professional organizations...State Museum and others when I was trying to find local informal science educators, and ever since, the ...

...report the presence of chemical contaminants in their fields. The authors call these “sentinel plants....scientists’ favorite model organisms belong to a group called dicots — think Arabidopsis thaliana. However, many...including rice, wheat, and corn, belong to the genetically distinct group of monocots… and many genetic ...comes from an anthocyanin, an endogenous pigment typically produced as part of a stress response. The team... system would be best suited for detection of chemicals that readily diffuse through plant tissue. Those...Swyers, N., Morgan, A., Meerdink, S., Kuzio, C., Calderon, S., Sheng, H., Kenney, S., Zare, A., Gehan, M...

...Produce Chemically and Functionally Distinct Vectors. Molecular Therapy - Methods and Clinical Development...and community concerns AAV vectors are complex biological reagents; many factors, like storage buffers ...out of fear it points to flaws or gaps in their technical ability. But, especially for AAV data, that may...experimental settings. It is a curated set of technical reports on AAV vectors from Addgene and the CLOVER...Hub. These minimum data standards are designed specifically to allow scientists to evaluate how small changes...evaluate AAV vector performance. Yet, most of the technical data needed to replicate and build on others’ ...word of mouth” as their source for this type of technical know-how, which highlights the dearth of AAV vector...

...MCC develops and makes freely available technical and pedagogical resources, offers mentoring for instructors...best teachers and mentors pass on more than just technical knowledge, shaping their trainees’ very way of...their research capabilities and laboratory and critical thinking skills (Knutson et al., 2010a,b). Classroom-based...at other institutions to form a support network called the MDH CUREs Community (MCC) that seeks to reduce...student enthusiasm, and research backs up that view (Callahan et al., 2022).     Fig. 2: Students in...Chapter 17, Einstein Discovers America. New York./  Callahan, K., Peterson, C., et al. 2022. External collaboration...classroom-based undergraduate research experiences spanning chemical biology, biochemistry, and neurobiology. CBE Life...

...have been used since the 1930’s in a range of biological studies, including investigations into environmental... are powerful resources for investigating any biological process. High quality genome sequence A high-... mutants In the 1990’s, two revolutionary large-scale random mutagenesis screens produced ~1,500 zebrafish...thousands of mutations in genes affecting diverse biological processes—not just development—are available ... zebrafish are short, modified oligonucleotides called morpholinos. When injected into zygotes, morpholinos...One common and robust strategy uses a transposon called Tol2 to randomly integrate foreign DNA into the...Naturally, the best model organism depends on the biological question, and zebrafish are not ideal for every...

... Predoctoral Fellow at University of Rochester Medical Center. During development, complex genetic programs...central nervous system (CNS). To address this technological gap, a trio of recent papers describe the development...Cre under neuron-specific promoters, including calmodulin-dependent kinase II alpha (aCaMKII; excitatory...with different untranslated or coding regions. Typically, each gene isoform has a distinct transcriptional...demonstrated by the Qi Lab, which developed a subgenome-scale CRISPRa screening approach in embryonic stem (ES...Miller-Rhodes from the University of Rochester Medical Center. Patrick Miller-Rhodes is currently a Ruth... Predoctoral Fellow at University of Rochester Medical Center. He studies gene-function relationships ...