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Showing: 261 - 280 of 486 results
  1. Retrograde AAV viral preps

    Type
    Collection
    ...physically separate nuclear dTomato, Cre-dependent Calcium sensor Ting 83899 pAAV-mDlx-GCaMP6f-Fishell-2 mDlx...final viral vector preparation. In some cases, in vivo testing of these viral preparations was performed by...Addgene is producing ready-to-use viral vector preparations in a retrograde serotype from the Alla Karpova...David Schaffer laboratories. These viral vector preparations were produced with the rAAV2-retro helper plasmid...-Ef1a-mCherry-IRES-Cre EF1a Cre and physically-separate mCherry expression Recombinases Deisseroth 105540...pAAV-EF1a-mCherry-IRES-Flpo EF1a Flpo and physically-separate mCherry expression Recombinases Deisseroth 55636...GCaMP6f-P2A-nls-dTomato Syn GCaMP6f and physically separate nuclear dTomato Calcium sensor Ting 51083 AAV-...
  2. Plasmids 101: Using Transposons in the Lab

    Type
    Blog Post
    ...somewhere else (Fig. 2). Class II TEs have LTRs on both of their ends.    Figure 2: Overview of DNA...has four major components: 1) a CRISPR RNA (crRNA), 2) four proteins (TniQ, Cas8, Cas7, Cas6) that forms...another. This jumping is what caught the eye of Barabara McClinntock who first discovered transposons due...
  3. Lentiviral Guide

    Type
    Guide
    ...selection. Desfarges S, Ciuffi A. Viruses. 2010. Jan;2(1):111-30. PubMed . Altering the tropism of lentiviral...Nerhbass U, Montagnier L, Charneau P. Cell. 2000. 101(2): 173-185. PubMed . Woodchuck Hepatitis Virus Posttranscriptional...to its wide infectivity) is encoded on a third, separate, envelope plasmid. All 2nd generation lentiviral...VSV-G Safety Safe. Replication incompetent: Uses 3 separate plasmids encoding various HIV genes. Safer. Replication...use because they require transfection with four separate plasmids in order to create functional lentiviral...could ligate a multiple cloning site (MCS) from a separate vector into the single site in the lentiviral ...generation lentiviral systems provided by Addgene separate transfer, envelope, and packaging components of...
  4. Antibodies 101: Producing Recombinant Antibodies

    Type
    Blog Post
    ...detection, and control. Int J Pharm. 2018 Oct 25;550(1-2):251-268. doi: 10.1016/j.ijpharm.2018.08.043. Epub...and particle formation. J Pharm Sci. 2015 Feb;104(2):602-11. doi: 10.1002/jps.24259. Epub 2014 Nov 21....Roberts, Prasad S. Sarangapani, Protein aggregation, particle formation, characterization & rheology, Current...are contained to one plasmid or if they’ve been separated onto two. You’ll first transfect your cells with...harvesting recombinant antibodies consists of separating antibodies from media, cells, and debris. Affinity...bind ligands on the beads and a magnet is used to separate the beads from the media (Brechmann et al. al.... of your prep. In this method, antibodies are separated by size on an SDS-PAGE gel. Once stained, the ...
  5. Simple CRISPR-based Epigenetic Editing: dCas9-directed DNA Demethylation

    Type
    Blog Post
    ...Hrit et al. 2018, Kaas et al. 2013). Figure 2: CRISPR TET-based epigenetic editing. In reality, ...approach for targeted DNA demethylation. Cell Discov 2, 16009. https://doi.org/10.1038/celldisc.2016.9.  ...hear it (whether at a scientific conference or a karaoke bar), you probably want to sigh. The problem is... directly inside the gRNA sequence is a great guarantee that DNMT1 will be blocked (within PAM works, ...
  6. Chromoproteins: Colorful Proteins For Molecular Biology Experiments

    Type
    Blog Post
    ...amilCP, tsPurple, and gfasPurple) (Figure 2). Figure 2: Chromoprotein expression from bacteria on.... https://doi.org/10.1007/bf00428249 Chan MCY, Karasawa S, Mizuno H, Bosanac I, Ho D, Privé GG, Miyawaki...Miyawaki A, Ikura M (2006) Structural Characterization of a Blue Chromoprotein and Its Yellow Mutant from ...Hoegh-Guldberg O (1995) Isolation and Partial Characterization of the Pink and Blue Pigments of Pocilloporid...
  7. Viral Vectors 101: Voltage Indicators

    Type
    Blog Post
    ...Indicators GEVIs can be divided up structurally into 2 main groups: voltage sensitive domains and Rhodopsin...depending on your experimental system.   Figure 2: General overview of chemigenetic tools. A genetically...mechanism of their voltage sensing component, which separates them into two distinct categories detailed below...phosphatases from sea squirts. This design structurally separates the two components of the indicator, which can...FP-rhodopsin GEVIs have been engineered to have kinetics comparable to its one component counterpart and is significantly...
  8. Deep Dive: Fixing and Permeabilizing for Immunofluorescence

    Type
    Blog Post
    ... of permeabilization and membrane integrity (Fig. 2). For example, saponin interacts with cholesterol ... at too high a concentration.      Figure 2: Examples of different permeabilization strategies...cause some confusion. Paraformaldehyde: Many IF protocols call for paraformaldehyde (PFA) as the fixative...recover good antibody binding by tweaking those parameters, but in some cases your antibody may just not...
  9. Fluorescent Proteins 101: Green Fluorescent Protein (GFP)

    Type
    Blog Post
    ...from GFP and the mutation definitions found in Table 2 may not apply. Table 1: The specific mutations comprising..., V163A EBFP F64L, S65T, Y66H, Y145F   Table 2: Functional role of specific mutations in GFP derivatives... color also exist with only slight variations separating them.  Please note that many fluorescent proteins...(FACS): This is a type of flow cytometry that separates mixtures of cells into distinct populations based... fluorescent signal. Thus, FACS can be used to separate cells expressing GFP from cells that are not. ...
  10. R Bodies: Membrane-Rupturing Microscopic Tools

    Type
    Blog Post
    ...be decorated with proteins and remain functional, 2) break membranes outside of their natural context ...PubMed PMID: 3759909. PubMed Central PMCID: PMC213417. 2. Schrallhammer, M. et al. Tracing the role of R-bodies...toxicity of R-body producing recombinant E. coli on paramecia. European Journal of Protistology 48, 290–296 ...
  11. Advice for Starting a Biotech Company from a Grad Student turned Entrepreneur

    Type
    Blog Post
    ...go anywhere. The team should initially consist of 2-3 individuals that are aligned in vision and outcomes... the technology. This transition takes around 1 – 2 years. The product is the measure of success. Technology...constantly practicing. “The expenditure of effort in preparation and practice is directly related to success presenting...
  12. Form Your Own Peer Mentoring Group: A How-To Guide for Scientists

    Type
    Blog Post
    ...The groups in these programs typically consist of 1-2 mentors and 3-5 mentees who meet together for an 8... together. If you all work at the same place, a 1-2 hour lunch on a regular schedule might work. If not...pre-reads, videos or exercises to be completed in preparation for the meeting or to be read or watched during...
  13. Tips for Screening with Yeast Two Hybrid Systems

    Type
    Blog Post
    ...domains retain their individual activities when separated (2), and that DBD and TAs from different systems...308. PubMed PMID: 6312261. 2. Keegan, L., Gill, G., and Ptashne, M. Separation of DNA binding from the transcription-activating...PubMed PMID: 2547163. 5. Ozawa, T., Kaihara, A., Sato, M., Tachihara, K., Umezawa, Y.l. Split luciferase...possibility for problems with one or more of these parameters can lead to a high number of false negatives ...
  14. Getting to Know Expansion Microscopy

    Type
    Blog Post
    ...your sample (i.e. cultured cells or tissues).  Step 2: attach anchors to your sample that will link biomolecules...quite so much. Created with biorender.com Steps 2-4 are not found in standard IHC/ICC protocols and ...to ~4-10x linearly! This expansion physically separates molecules while maintaining their relative positions...pre-expanded samples can sometimes take on a fragmented appearance post-expansion, but that doesn’t mean we should...understanding of neuronal synapses, centrosomes, parasites, and more (Bertiaux, et al. 2021; Gambarotto, ...new insights into the cytoskeleton of malaria parasites including the conservation of a conoid. PLoS Biology...10.1038/s41592-018-0238-1  Klimas A, Gallagher BR, Wijesekara P, et al (2023) Magnify is a universal molecular...
  15. Antibodies 101: Polyclonal Antibodies

    Type
    Blog Post
    ...animal is given additional booster immunizations every 2-3 weeks to increase the antibody titer. The titer ...level of antibodies is reached - typically within 2-4 months. After the animal has the desired level of...animal. The red blood cells and the serum are separated, and the serum - which contains the antibodies...
  16. Summer SciComm: Preprints

    Type
    Blog Post
    ... to share information about the emerging SARS-CoV-2 virus quickly and openly. By sharing results faster...Open Scientific Communication Ecosystem Fig. 2: The scientific ecosystem, enriched by open access...bioRxiv. https://doi.org/10.1101/2021.09.07.459259 Sarabipour S, Debat HJ, Emmott E, Burgess SJ, Schwessinger...
  17. INTEGRATE: Bacterial Genome Engineering Using CRISPR-Transposons

    Type
    Blog Post
    ...et al., 2020). Genomic targets require an upstream 2-bp PAM sequence for recognition by QCascade; although...cells of the plasmid after integration. Figure 2: (A) Streamlined VchINT expression constructs. (B)...target DNA sequences using RNA-DNA base pairing. Separately, TnsABC forms a transposase complex with the ...bp target-site duplication (TSD), a hallmark characteristic of the Tn7-family of transposons. Insertion...Sternberg group’s initial report of VchINT, three separate plasmids and multiple promoters were used to express...Additionally, by expressing multiple crRNAs in parallel (Fig. 3), multiplexed insertions into multiple...
  18. CRISPR 101: Epigenetics and Editing the Epigenome

    Type
    Blog Post
    ...form or as ready-to-use lentivirus. Figure 2: dCas9-Tet1 demethylates cytosines at promoters and...pX330a dCas9-LSD1 for targeted removal of H3K4me1/2 and H3K9me2 histone modifications. Like the TALE-LSD1...approach for targeted DNA demethylation. Cell Discovery 2: . https://doi.org/10.1038/celldisc.2016.9 Find plasmids...could identify the target genes of previously uncharacterized enhancers. The popular TALEN-based LITE system...
  19. A New Generation of Adenine Base Editors Improves Editing in Primary Human Cells

    Type
    Blog Post
    ...NGG-3′ (“N” can be any nucleotide base, followed by 2 guanines). This limits the use of ABEs as DNA sites... in the promoter region of gamma hemoglobin (HGB1/2) leads to continuous expression of fetal hemoglobin...found that the smaller version, ABE8.x-m, showed comparable editing behavior to ABE8.x-d. Overall, ABE8s ...MS, Rinaldi C, Slaymaker IM, Yen J, Young LE, Ciaramella G (2020) Directed evolution of adenine base editors...
Showing: 261 - 280 of 486 results