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We narrowed to 954 results for: COMP

Showing: 601 - 640 of 954 results
  1. R Bodies: Membrane-Rupturing Microscopic Tools

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    Blog Post
    ...sources. While the importance of understanding these complex processes can’t be overstated, we can also learn...degradation under a variety of conditions. They are composed of 4 proteins encoded in a single operon and were...
  2. Resume Writing for Non-academic Science Careers

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    Blog Post
    ...experience using image analysis software. If you use computer programs to predict protein structures, then you... you might know a thing or two about computer modeling. Make sure to focus on these skills. The only exception... into a communications role instead after she completed her MSc in Experimental Medicine. She is the Community...
  3. Plasmids 101: How to Verify Your Plasmid Using a Restriction Digest Analysis

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    Blog Post
    ...than a day. Diagnostic restriction digests are comprised of 2 separate steps: 1) incubating your DNA with... construct. Consider buffer and temperature compatibility when digesting with more than one enzyme. Consult...will allow you to approximate the DNA mass of comparably intense samples of similar size. Run the gel ...
  4. OCaMP: A New Calcium Indicator for Neural Imaging

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    Blog Post
    ...needs to emit a different color of light and be compatible with the lasers available in your microscope ...jRGECO1a and jRCaMP1a are widely used as well. To complement these tools, we recently developed a new orange...1030 nm, enabling two-photon imaging without compromising on brightness, ∆F/F0, or signal-to-noise ratio...
  5. Viral Vectors 101: Types of viruses

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    Blog Post
    ...that use reverse transcriptase to synthesize complementary DNA copies of their genome upon infecting a ...gamma-retrovirus are so closely related, their required components are very similar. While plasmids containing virus-specific...between the two systems, other, more general, viral components such as a heterologous envelope or a post-transcriptional...
  6. Viral Vectors 101: Viruses as Biological Tools

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    Blog Post
    ...nature, extra safety measures, like replication incompetent viral particles, are required. We will be covering...infect both non-dividing and dividing cells. They accomplish this through nuclear localization signals which... immunodeficiency virus type 1 preintegration complexes.” Proc. Natl. Acad. Sci. U.S.A. 89 (1992) 6580...
  7. Developing a cold tolerant E. coli using specialized chaperones

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    Blog Post
    ...However, one of the many proteins which are not compatible with regular mesophilic systems are the psychrophilic...chaperones protein resulted in higher levels of growth compared to the E. coli strain expressing the empty vector... Medal in the Undergrad category at the iGEM Competition 2019. He has an active interest in scientific...
  8. Addgene’s Viral Service - Why Virus? Why Now?

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    Blog Post
    ...service supporters We would like to thank the companies who supported this project with funding. Alnylam...donations. That seed money was used to build a completely self-supporting service so that Addgene is not...distribution, this project involved every Addgenie in the company. Our Finance, Business and Legal teams had to pave...
  9. Form Your Own Peer Mentoring Group: A How-To Guide for Scientists

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    Blog Post
    ...to start a more formal mentoring program at my company, but there weren't enough senior people willing... such as pre-reads, videos or exercises to be completed in preparation for the meeting or to be read or... and help each other practice meeting people – compete for fastest to set up a coffee date or most cards...
  10. To Each HIS Own

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    Blog Post
    ...proteins within a system. This can be pretty complicated given that a single cell has tens of thousands...strategy a single protein can be isolated from a complex mix using affinity chromatography against an amino...then eluted using a high imidazole buffer that outcompetes the interaction between the protein of interest...
  11. RNA Extraction Without A Kit

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    Blog Post
    ...or tissue collection method, so biotechnology companies have marketed several products that help to further... RNAzol®, QIAzol®  and sold by many different companies). TRIzol® is an all-in-one acid-guanidinium-phenol... is the carryover of DNA that can potentially complicate results of a downstream application such as quantitative...
  12. Hot Plasmids - March 2020 - base editors, GEVI, MoClo, and optogenetics

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    ... was also between 1013 - 1014 vg/kg, a dosage comparable to those currently used in human gene therapy...fluorescent voltage indicators, however, fall short compared to GFP-based sensors in terms of response and ...precision of gene expression and reduces toxicity as compared to previous Cre/lox or drug-induced Cre systems...
  13. Plasmid Tools for Microbiome Studies

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    ...validated their platform on clinical stool samples by comparison to qPCR and demonstrated that it can also detect...without fixation or preparation, and deliver CRISPR components for gene disruption or CRISPRi. While designed...bacteriophage shell protein or a bacterial microcompartment protein. The expression of this fusion is ...
  14. Channelrhodopsins with improved light sensitivity for minimally-invasive optogenetics

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    Blog Post
    ... light sensitive and have enhanced conductance compared to current channelrhodopsins. Their new channelrhodopsins...neurons do not express as many copies of the ChRs as compared to direct injection. This lower multiplicity of...better suited for systemic delivery with PHP.eB compared to the existing ChR2(H134R).  In the second experiment...
  15. CRISPR 101: Cas9 vs. The Other Cas(s)

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    Blog Post
    ...is guided by an RNA molecule, the gRNA, to a complementary site in the genome where it will proceed to ...that Cas14 also indiscriminately cleaves non-complementary ssDNA when engaged by its target sequence. Why...Cas7-11 Cas7-11 is a naturally occurring RNase composed of the fusion of several Cas7 and Cas11 domains...
  16. Uncertainty about Labor Law Brings More Uncertainty to Postdoc Wages

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    Blog Post
    ... had been collecting data and documenting the compliance of universities with the FLSA in our online resource... salary raising as the only viable option for compliance. However, 10 days prior to the implementation...opportunity of the lapsed mandate (or are being compelled at the state level, in the case of some public...
  17. Gendered Innovations: Why Does Sex of the Cell Matter?

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    ...Stanford University. Sex and gender are critical components of biological research that are often forgotten...cost at this early stage of research is minimal compared to that of human clinical trials. And, as Janine...studies that draw from a body of research that is incomplete (because sex was not analyzed) may harm humans...
  18. Addgene's Tips for Plasmid Quality Control

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    ...Cloner, and Snapgene), and save these to a shared computer or server. This will ensure that future members...more than two sequencing reactions. In the more complex cases, we sometimes have to design new primers ...saves us the step of purifying the DNA and gives comparable success rates and sequence quality, which is ...
  19. CRISPR 101: Targeting Non-Coding RNAs with CRISPR/Cas9

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    ...difficult to functionally manipulate and study in comparison to protein-coding genes (Rinn and Chang 2012)...deletions and insertions in the DNA sequence can completely disrupt expression of the transcribed ncRNA (...interactions between ncRNAs and adjacent genes are complex and not yet fully understood, so it is important...
  20. CRISPR in the Clinic

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    ...well as the introduction of the cancer-fighting component, CAR. Clinical trials are underway to explore ... have involved turning on fetal hemoglobin to compensate for defects in the adult hemoglobin produced ...for use in the next few months. Several other companies have followed suite, with Beam Therapeutics initiating...
  21. Antibodies 101: Choosing the Right Isotype

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    Blog Post
    ...choosing antibodies   Complexity is a key factor Biological systems tend to be complex with a variety of ...proteins interacting. Experiments tend to be equally complex with users trying to probe multiple targets in ...
  22. Adenoviral Vector Production and Troubleshooting

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    Blog Post
    ...response against AdV. Importantly, recombination-competent adenovirus (RCA) can be generated if the E1 gene...negligible toxicity. However, their production is more complex and the presence of helper virus contaminants have...amplification.*Pro-Tip*: The cells will become completely confluent and the media will turn yellow. Do ...
  23. Lab Automation at Addgene

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    ...allowing us to do up to 96 transformations in one run compared to doing about 50 transformations in the same ...increased plasmid demand it was too time consuming to complete this process by hand and we welcomed yet another...liquid handler can fill 400 vials in 35 minutes compared to a lab assisstant filling about 200 vials in...
  24. Synthetic promoter AAVs for cell-type specific expression in retinal cells

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    ...cones) or cell classes (ex: photoreceptors which encompassed both rods and cones).  Targeted expression was...retina.  Find the AAV synthetic promoter plasmids! Comparing synthetic promoters performance in mouse, monkey...targeted cells in monkey and human retinas. By comparing the performance of promoters across these three...
  25. Simple CRISPR-based Epigenetic Editing: dCas9-directed DNA Demethylation

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    ...machinery.   Well, I’ve got some good news: complete DNA demethylation can be achieved by dCas9 alone...too.  High dCas9 and gRNA expression are key for complete DNA demethylation – tight binding is crucial for...Charlton J, Jung EJ, Mattei AL et al. (2020) TETs compete with DNMT3 activity in pluripotent cells at thousands...
  26. Engaging with science and society at pgEd

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    ...of science, even while I was a bench scientist completing my graduate studies in molecular biology and ...for the past three years. pgEd is a small team comprised of individuals from diverse backgrounds and disciplines...social context. This “general public” audience comprises the taxpayers who fund much of scientific research...
  27. Science communication: 9 Strategies to Get Your Foot in the Door

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    ...itself. Among other things, science communication comprises broadcasting, science writing, and certain aspects... get on stage for a Science Slam – a sort of competitive TED talk – to win the audience’s applause with...photography and participate in a science photo competition. Or nominate yourself as an educator for a short...
  28. Plasmids for Endogenous Gene Tagging in Human Cells

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    ...get the molecular components of CRISPR/Cas9 (Cas9 protein and the crRNA-tracrRNA complex) and the donor ...destabilizes the cell’s outer membrane and allows the components to physically enter the cells so they can go ...
  29. Plasmids 101: Terminators and PolyA signals

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    Blog Post
    ...structure of the hairpin-DNA complex is thought to destabilize the transcription complex, initiating cleavage ...mechanism, whereas Polymerase II termination is more complex and involves two RNA polymerase-associated proteins...
  30. 7 Simple Strategies to Resolve Conflicts with Difficult Supervisors

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    ...who are usually antagonistic and impolite, Complainers, who spend most of their time moaning about their...with negative comments (hostile-aggressives, complainers, know-it all experts, wet-blanket negativists...support from your colleagues or other supervisors to complete your work. Whether your supervisor is a negative...
  31. Hot Plasmids: Winter 2025

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    Blog Post
    ... strategy uses new combinations of PE protein components (Figure 1), an altered epegRNA delivered with...protein-coupled receptors (GPCRs) are critical components of many physiological pathways and represent ...et al., 2024). Each plasmid expresses all the components of the biosensor in optimal proportions from ...
  32. The AAVantages of AAV in CRISPR Screens

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    ...screens have gotten larger, easier, and more comprehensive thanks to the consistent development and improvement...vectors is how the cargo — in this case, the CRISPR components — are expressed. Unlike lentivirus, cargo delivered... away from the comfort of Cas9, and opt for a completely different Cas effector, like Cas12a (Cpf1). Even...
  33. PRIDICT: Predicting Efficiencies of Prime Editing Guide RNAs

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    Blog Post
    ...RNA (pegRNA). The pegRNA consists of a target-complementary spacer, a scaffold sequence, and an extension...accounting for some of the inherent inaccuracies of computational prediction models. In addition, we provide options...Switzerland), where he developed a strong passion for computational biology. His expertise includes applying machine...
  34. No Llamas Required - Synthetic Nanobodies Against Membrane Proteins

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    ...proteins on the cell surface. Figure 1: Comparison of common antibody, HCab, and nanobody. For more...starting library size (up to 1012 members) in comparison to other display systems using phage and yeast...the end of the mRNA molecule, forming a ribosome complex consisting of the translated protein (sybody), ...
  35. Polymerase Chain Reaction Overview and Applications

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    Blog Post
    ... fluorescent signal throughout the reaction is compared to a standard curve of amplified DNA of a known...The cycle in which the unknown DNA is detected compared to the standard curve can be used to determine... to note however, that multiplex PCR is more complicated to develop and is often less sensitive than PCRs...
  36. Plasmids 101: Optimizing Plasmid Yields

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    ...the cell lysis process. To ensure that lysis is complete, use a reagent like Qiagen’s LyseBlue, which uses... uses color to show you if lysis is incomplete. Protein expression strains are not good for cloning Bacterial...the material used for inoculation. To further complicate matters, plasmid copy numbers are often ambiguous...
  37. Sharing Your Lab Protocols: Using Apps to Save Time & Track Your Experiments

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    ...service free of charge to scientists by allowing companies to pay publish their catalogs on the site. Like...of checking off each step as you painstakingly complete your experiment – one small victory in a long ...manage scientific data: Electronic lab notebooks compared with Google Docs and wikis - by Rory Macneil on...
Showing: 601 - 640 of 954 results