We narrowed to 802 results for: LAT

...brightness for a few commonly used fluorophores in relation to the laser type. Table adapted from: https:/...are absorbed and then emitted, which creates a relatively stronger — or brighter — signal.   Figure...use brighter fluorophores for markers that are relatively lower in abundance. In contrast, when you expect...the spectra of enhanced GFP (eGFP) and FITC, the latter being a commonly used fluorophore for antibody-...again. In the beginning, we talked about the relationship between a photon's wavelength and energy, how... into different levels of brightness and their relation to the fluorophore's excitation efficiency, and.... His projects include investigating negative regulators of T cells and cytokine signaling in tumor immunity...

...Unfortunately, plasmid copy numbers vary within cell populations and over time resulting in variable gene expression... use of stabilized promoters. In contrast to unregulated promoters that are always on, stabilized promoters...expression. However, if you introduce negative regulation by using a promoter that is responsive to a repressor...that the stabilized promoters were able to better modulate gene expression during shifts in growth rate as... as compared to a constitutive promoter. To simulate the increase in plasmid copy number during the transition...generation of the desired product while avoiding the accumulation of toxic intermediates or the shuttling of the...

...is the question. When presenting on building relationships (also known as “networking”), one of the most...networking to start, build, and track professional relationships. Here are my seven best tips beyond the basics... “Joanne Kamens, PhD viewed your profile.”  The latter is much less creepy. If we’ve met before, I’d be...on LinkedIn!” resulting in just a little more relationship. Pro tip: Once you are connected with someone...connection requests LinkedIn is a place to build relationships. If you don’t add a personal note, you waste...volunteer organizational work. LinkedIn is not the platform for politics, family updates, or click bait of...

...purification. In this strategy a single protein can be isolated from a complex mix using affinity chromatography...variety of methods can be used to successfully isolate proteins, this blog will focus on one of the most...the protein of interest and it is successfully isolated.   Prior to the polyhistidine tag, alternative...binding of untagged proteins. Despite being a relatively low frequency amino acid, proteins containing...questions about polyhistidine tags. For more antibody-related information, sign up to receive alerts for antibody...Purification of Recombinant Proteins with a Novel Metal Chelate Adsorbent. Bio/Technology. 1988; 6: 1321–1325. ...

...future prospects. Among the topics discussed, many related to the structure of the biomedical workforce. Quotes...results, not scientists”  These comments are well correlated with published data. For example, in 2010, less...compulsory internship to be taken in an industry, regulatory, or clinical environment. It remains contested...6). Academic data and the labor market for PhDs Later this week, postdocs and students will again gather...grants through the Sloan foundation for postdoc-related data collection and analysis. He is also a strong...training to reflect the workforce." Science Translational Medicine (2015): 285ED4. Pubmed PMID: 25925677...

...have adapted the components for use in genome manipulation. Cre recombinase, originally named because ...because it “causes recombination” (although later referred to as the “cyclization recombinase”), is a 38 kDa... in a DNA sequence allows for very specific manipulations as discussed below. How does it work? As alluded...expression – placing a series of transcriptional and translational termination features with loxP sites on either... can be used to easily perform this eviction. Regulated Cre expression – placing Cre downstream of promoters...express Cre under a variety of ubiquitous and regulated promoters, and many loxP-containing alleles have...

...received over 13,000 plasmids requests for COVID-19 related plasmids. These plasmids have reached labs in over...expression and pseudotyping efficiency. This plasmid was later used by another team of researchers for neutralization...opportunities to evolve. Several variants are now circulating and plasmids containing these mutations have ...are inhibitors of SARS-CoV-2 entry and become upregulated during viral infection.  Expression of SARS-CoV...their work, head over to their blog post. Months later, we partnered with Ginkgo Bioworks to provide synthesized...screens identify mucins as critical host factors modulating SARS-CoV-2 infection. bioRxiv. https://doi.org...

...field as it provides a noninvasive method for manipulating cell activity, especially neuronal firing. ...approved drugs so that your results are viable for translation to human patients. Picking receptors The receptor...dependent on what cellular response you aim to manipulate. It is important to consider that the same receptor... in. The most common target for chemogenetic manipulation are neurons where chemogenetic receptors can...control ion flux. The system allows you to directly manipulate ion channels. When working with PSAM receptors...BL, Jin J (2015) The First Structure–Activity Relationship Studies for Designer Receptors Exclusively Activated...

...Nobody’s perfect! This is a platitude I’m sure we have all heard. It’s a truth that extends to both people... of tools that rely on DNA amplification and manipulation to produce and edit plasmids. These are prone...polymerases can make mistakes and lead to the accumulation of errors in DNA sequences. In research, these...and identifying mixed plasmid and nucleotide populations. All of these topics require additional considerations...sequence and assemble using the Illumina MiSeq platform, such as GC-rich regions and highly repetitive...Plasmidsaurus for long-read nanopore sequencing. This platform sequences the entire plasmid in one read and thus...

...calls, I feel compelled to share my years of accumulated wisdom so that you, the customer, can get the...these tips and tricks will apply to any biology-related customer support interaction. Before contacting...paperwork associated with a product only to realize later that everything I could have wanted to know was ... science, but we don’t have the resources to recapitulate the experiments performed by our thousands of...use a particular reagent.  We also have links to later papers that successfully used said plasmids. We ...support scientists wear many hats at this still relatively small nonprofit. If you do go longer than a few...

...City The conference was located in the modern, relatively new “Science City” area on the outskirts of Guangzhouon...human tRNA genes and, until now, we've overlooked regulatory fragments of these transcripts. I remember when...have allowed them to begin understanding complex regulation of and by tRNAs and tRNA-derived RNAs. Stay tuned...Medicine presented another unexpected finding in the regulatory RNA field. The Rajewsky lab is studying circular...of Georgia studies the CRISPR/Cas system as it relates to its natural role in prokaryotic immunity to ...against both DNA and RNA viruses - 2 cas systems regulate at the DNA level and 1 at the RNA level. Udi Qimron...

...DNA in your sample relative to your normal control - you can set up your calculations so that your assay... one-copy ‘housekeeping’ gene), and quantified relative to a 'normal' sample with known copy number set...nice thing about qPCR is that since it measures relative quantification - that is, since you’re looking...all double-stranded DNA, while Taqman uses an intercalating dye, with a fluorescent probe and quencher to...provides absolute quantitative data, instead of relative quantification.  Even though no one option is ...

...other systems because the system modulates protein post-translationally, unlike many other methods. Secondly... tags has become increasingly popular for the modulation of endogenously and exogenously expressed proteins...systems. Degron tags are one of many tools to manipulate protein expression. These tags offer several ...Secondly, these tags can be used to manipulate endogenously and exogenously expressed proteins. Thirdly...degradation. Since its first use as a protein regulation tool, AID has gone through an additional round...

...any antibody (positive population) or won’t bind anything (negative population). It is strongly recommended...immunologists, allowing for the rapid analysis of cell populations within a heterogenous tissue type, such as PBMCs...moreso than other methods, the identification and isolation of rare cell types. In recent years, full spectrum...for better resolution of positive and negative populations, Careful panel design In both conventional and...create difficulty when trying to resolve those populations. PE/Cy7 and BB515, on the other hand, have a ...

...important to understand that these platforms, or pieces of a platform, that are now available exist within...well-characterized bacterial transcription and translation initiation elements. Open science with BioBricks...replication of DNA, transcription of DNA to make RNA, translation of RNA to make proteins. That's central to everything... transduce otherwise invisible molecules into regulation of gene expression including growth or fluorescence...gene expression via standard transcription and translation initiation." Nature Methods. 10, 354-360 (10 ...

...vector - overall, I spent two years testing and reformulating our AAV construct to optimize performance in...Working at Addgene has shown me this was far from an isolated case. Our scientific support team answers hundreds... AAV questions every year on a range of issues related to AAV vectors, many from people trying to answer.... (2020). Methods Matter: Standard Production Platforms for Recombinant AAV Produce Chemically and Functionally...its occurrence during vector purification and formulation. Molecular Therapy, 12(1), 171–178. https://doi.org...Researcher Perspectives on Data Sharing in Deep Brain Stimulation. Frontiers in Human Neuroscience, 14(December...

... science.                    Two of the platforms we use at Addgene: YouTube, for longer educational...octogenarians is going to be a hard sell!) Digital platforms often have demographic data of their users readily...geographic location. For example, not all social media platforms are available or used in all countries; not all...the limitations and potential of your preferred platform before you start can save a lot of trouble in ...requirements.  No visuals. Variety of hosting platforms can splinter audience. Primarily digital distribution...communicators. Well-developed content creation platforms.  Algorithms can make it difficult to reach people...

...However, retroviral vectors can still direct the translation of proteins because they integrate this reverse-transcribed...then use cell machinery for transcription and translation. Here, we will discuss several aspects of the...The genome of viral tools are often not virology related at all, and you will instead get expression of ... Cullen, B. R. (1992). Mechanism of action of regulatory proteins encoded by complex retroviruses. Microbiological... sarcoma virus: purification of the virus and isolation of the nucleic acid. Proceedings of the National...Initiation of synthesis with 70 S viral RNA as template. Journal of Molecular Biology, 79(1), 163–183....

...more focused format, where all students work on malate dehydrogenase (MDH), a citric acid cycle enzyme...recently purified MDH to study the impact of phosphorylation on the enzyme’s structure, function, and interaction...offering excellent training in improvisation and the latter making him a more effective motivator (“be like...conducting NIH- and NSF-funded research on planarian flatworms both in and out of the classroom.   References...characterization of a fusion protein: Histidine tag, malate dehydrogenase, and green fluorescent protein. Biochemistry...laboratory – a semester-long research approach using malate dehydrogenase as a research model. Biochemistry...

...about how they became grant professionals, mid- to late-career grant professionals have similar stories ...’s requirements as well as state and federal regulations. A grant professional’s job duties can range ...close-out a grant. Grant professionals also build relationships with foundations and government grantmakers....keep up-to-date on the changing guidelines and regulations impacting grant management, we track grant opportunity...amount of grant funds available and the increasing regulatory process for grants has fostered the demand for...worked for a health department and then for the regulatory services department as our healthy homes program...

...GFP derivatives, but are instead related to the dsRed protein isolated from Discosoma sp. Similar work ...common fluorescent proteins and their mutations relative to wildtype GFP. Although not listed here, many... fluorophores Fluorescent Protein Mutations Relative to Wildtype GFP EGFP F64L; S65T EYFP S65G;...that separates mixtures of cells into distinct populations based on fluorescent signal. Thus, FACS can be...has also been used to identify particular cell populations in drug screens, to visualize micrometastases...

...receiving the translation, Addgene contracted with a professional scientific translator, L. Denise Roche...101 eBook is now available in Spanish!  This translation was gifted to Addgene by Daniel Mejías Sánchez...Roche, to edit the translation. We are pleased to announce that CRISPR 101: Una herramienta de edición ...  Many thanks to:  Daniel Mejías Sánchez, PhD, translator  Denise Roche, PhD, MD, editor, ldeniseroche@...

...Transcribing and translating a protein fluorophore also takes time - bypassing translation altogether with...affinity, were eventually called aptamers, from the Latin aptus, meaning “to fit”. SELEX could be used to ... protein fluorophores and quenchers are still relatively bulky. One of the advantages of oligonucleotides... context of a paired fluorophore protein. Years later, Samie Jaffrey’s laboratory took advantage of their...hydroxybenzylidene imidazolinone (DFHBI) with relatively low fluorescence in vivo, the Jaffrey lab used...

...L-arabinose) without signs of toxicity or burden relative to a fluorescent protein control. We also added.../L yeast extract, and 5 g/L NaCl) or on LB-agar plates containing glucose and L-arabinose at 37oC for ... arabinose and colonies on arabinose-containing plates will be visibly white, and gas vesicles in cells...from left to right: colony whiteness on inducer plates, white inclusions in cells with GVs via phase contrast...heterogeneity required single cell screening to isolate a clonal cell line capable of producing ultrasound...homogeneity, as the cells could be batch-sorted to isolate a polyclonal cell line with strong gas vesicle ...

...space — developing tools for cellular targeting. Lately, they’ve been working on two tools that expand ...safe to say the sample had their attention! They isolated DNA from the sample, amplified the CRISPR locus...most common RNA targeting system, Cas13, the "collateral" activity of the enzyme can lead to off targets...this information to identify a large variety of related bacteria with similar Cas systems. Some of these...knockdown efficiencies. The ability to identify related Cas systems opens up the potential of further development... also compatible with both AAV and adenovirus templates. The system, which is larger than Cas9, can also...

...enhancers to target cell populations Enhancers are non-coding sequences of DNA that regulate gene expression by...highly specific tools to target different cell populations and regions of the brain. This has culminated...others. The same mechanism that allows enhancers to regulate gene expression in a cell type-specific manner... Figure 1: Schematic of transcriptional regulation by an enhancer. Created with BioRender.com. ...find enhancers to target many different cell populations and brain regions and the genetic tools that ...

...the ratio of genome-containing viral particles relative to the total number of viral capsids (which can...vectors consist of full particles (white arrowhead) relative to empty particles (black arrowhead). Scale bar...measured by qPCR.   Physical titer is typically calculated by two popular PCR-based methods: Quantitative...is a factor in AAV titration since the starting template is the purified viral vector solution (which contains...be mitigated by using purified viral DNA as the template instead of the intact AAV particle. Finally, ...absolute titer values may not be as important as the relative titer values. Finally, because physical titer ...

...undergo post-translational modification with fatty acyl chains. For instance, myristoylation requires an...Also, in cases where the protein of interest is relatively small, adding GFP may alter diffusion rates. ...Although bioluminescent probes are usually dim relative to fluorescent probes, recent engineering efforts...an N-terminal consensus sequence (MG-) and prenylation requires a C-terminal consensus sequence (-CaaX... that the N- and C-terminus of GFP itself are relatively close, thereby minimizing the disruption of the...

...cells with exogenous biotin. After a few hours biotinylated proteins can be captured on streptavidin affinity... on neighboring proteins resulting in their biotinylation. The advantage of APEX is its speed, labeling...biotin catalytic domain to allow for promiscuous biotinylation. Compared to BioID, BioID2 exhibits enhanced...ways to detect RNA-protein interactions that can regulate multiple biological functions. RapID (RNA-protein...Any proteins that bind the RNA motif will be biotinylated. Read more about RapID in this blog! Find plasmids... Plasmid 101 Protein Expression Plasmid 101 Biotinylation Other resources Proximity labeling review:...

...year. Feel the love with MTRIA sensors One of the latest additions to Addgene’s catalog is a new class of...domain of ZAP70 (ZtSH2) which binds only the phosphorylated state of an immunoreceptor tyrosinase-based...only when the RTK is activated and the ITAM phosphorylated. To demonstrate that pYtags can be generalized...smell the flowers - or rather, the lactate! The latest biosensor from Gary Yellen’s lab is LiLac, a fluorescence...concentrations of lactate. The microfluidic screening platform developed here is also a promising approach for...other targets. Figure 6: A) Schematic of BeadScan platform for screening candidate biosensor variants for...