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  1. Plasmids 101: Secondary Nanobody Toolbox

    Type
    Blog Post
    Published
    Feb. 27, 2018, 2:04 p.m.
    ...State University Use Nanobodies to Control Protein Activity Learn more about protein tags Read about E. coli...figures 4A-C). And since they have limited cross-reactivity between different IgG subclasses and different...primary antibody-nanobody mix can be added to your sample, thus eliminating the secondary antibody incubation...568, or Alexa Fluor 647 before application to the sample. Staining with this multi-color staining workflow...
  2. Tips for Using FRET in Your Experiments

    Type
    Blog Post
    Published
    Nov. 5, 2014, 3:41 p.m.
    ...used to measure conformational changes, cleavage activity using FRET-based biosensors, and interactions ...What is FRET? In their JCB 2003 paper, Sekar and Periasamy defined FRET as "a distance-dependent physical...341-50. doi: 10.1002/bies.201100098. Sekar RB, Periasamy A. Fluorescence resonance energy transfer (FRET...
  3. Antibodies 101: Reading a Flow Plot

    Type
    Blog Post
    Published
    Feb. 6, 2024, 3:13 p.m.
    ... dendritic cell function and increased B cell activation. PLOS ONE, 12, e0180664. https://doi.org/10.1371... are represented as a series of dot plots in the same order. However, in an actual flow cytometry run,...parallel.  Let’s imagine we’re looking for cells in a sample that are negative for marker A and positive for... proxy for nucleic complexity of the cell.  The sample will have been labeled using a panel of markers... dots. In a contour plot, each line contains the same number of events. Thus, contour lines that are close...
  4. Advanced Uses of Cre-lox and Flp-FRT - A Neuroscientist’s View

    Type
    Blog Post
    Published
    Oct. 19, 2017, 1:54 p.m.
    ...the nucleus where they exert their recombinase activity (Logie and Stewart 1995; Metzger et al. 1995)....reintroduction, inversion and re-inversion happen at the same probability. Continuous inversion of the DNA sequence...recombination can only occur between target sites of the same sequence in FLEx vectors, the DNA sequence that ...manipulations in vivo, FLEx vectors expressing the light activatable ion channel under the control of Cre recombinase...neuron and its synapse should be visualized at the same time from two different plasmids this approach becomes...connectivity before and after the gene knockout in the same mouse.   Scientists always strive for more....
  5. Evolution of Lab Techniques

    Type
    Blog Post
    Published
    June 21, 2016, 2:30 p.m.
    ...synthesized by electronically recording fluorescence activity as fluorescently labeled nucleotides are incorporated...membrane for analysis through hybridization of a radioactively or fluorescently labeled probe. If the DNA is...searching for), then the probe will bind to the sample thereby labeling it. The label can then be visualized...visualized by autoradiography and X-ray film for radioactively labeled probes or by the presence of fluorescence...strength of the signal in comparison to a control sample. Southern blotting applications range from confirming... MstII and southern blotting are conducted on a sample from an individual without sickle cell anemia, ... largely replaced by real-time PCR to answer the same experimental questions. Real-time PCR detects and...
  6. Antibodies 101: Introduction to Gating in Flow Cytometry

    Type
    Blog Post
    Published
    April 4, 2024, 1:15 p.m.
    ...gate to focus your analysis on what’s biologically active. After that, the next gates fully depend on your...When using flow cytometry to analyze your samples, it is necessary to set up a sequence of gates to be...the area under the resulting curve. By default, a sample on the flow cytometer (before you set the first...Practical example: lymphocytes in a mouse tumor sample You made it! So much about the theoretical background...gated out my lymphocyte population from a tumor sample. Many cell types can be found in the tumor microenvironment...proportion between H and A (or W and A) within the same type of scatter. Here I employed an FSC-H / FSC-...pattern of positive vs. negative signal remains the same (Figure 5).   A.                                                                                                        ...
  7. Hot Plasmids Spring 2024

    Type
    Blog Post
    Published
    May 23, 2024, 1:15 p.m.
    ...for a range of applications, including CRISPR activation by dCas9-VPR, prime editing, and delivery of ...#211756 (left panel) or #211757 (middle panel). Samples were also immunoblotted against vinculin as a loading...during action potentials of fast-spiking neurons. The same A-to-D mutation in the related voltage indicator...
  8. Getting the Most from Your Lentiviral Transduction

    Type
    Blog Post
    Published
    April 7, 2016, 2:30 p.m.
    ... nucleic acid or express transgenes as well as actively dividing cells resulting in lower lentiviral titers.... Know your target cells Labs tend to follow the same general procedure for lentiviral infections, produce...but also between different lots of serum from the same source. Labs that routinely produce lentivirus may...
  9. Fluorescent Proteins 101: Fluorescent Protein Timers

    Type
    Blog Post
    Published
    May 4, 2017, 2:30 p.m.
    ...changes in oxygen, temperature, and pH, but timer activity can be calibrated to these different conditions...and look at them under a microscope, fractionate samples to isolate particular organelles and their contents...
  10. Degrading DNA with Cascade-Cas3

    Type
    Blog Post
    Published
    Feb. 11, 2025, 2:15 p.m.
    ...non-target strand. The helicase domain is then activated, and Cas3 begins unraveling the double-stranded...using Cas9, two or more gRNAs must be used along the same chromosome. During DNA repair, there is a chance...
  11. Plasmids 101: Protein tags

    Type
    Blog Post
    Published
    Dec. 11, 2014, 4:26 p.m.
    ...various mutations used to increase its stability activity, can be readily purified using plasmids found ...protein since the enzyme cleaves the SUMO tag in the same manner as it would have in the context of a cell...
  12. Hot Plasmids: Summer 2024

    Type
    Blog Post
    Published
    Aug. 27, 2024, 1:15 p.m.
    ...dCas9, zinc finger proteins, and transcription activator-like effectors (TALEs), with fifteen total variants...protect fragile samples during cryo-EM grid plunge freezing By Rachel Leeson Cryo-EM samples can be damaged...and structure determination LEA proteins protect samples during cryo-EM grid freezing Engineered and evolved...antibodies for marking astrocytes MagIC-Cryo-EM for sample enrichment and structure determination By Mike ...enrichment streamlines the purification and minimizes sample loss while also supporting imaging, making it easy...cryo-EM grid.     Figure 1: MagIC-cryo-EM for sample enrichment and structure determination. A) Schematic...beads for scarce macromolecules in heterogeneous samples. bioRxiv 2024.01.21.576499; doi: https://doi.org...
  13. An Integrin Antibody Toolkit from IPI

    Type
    Blog Post
    Published
    March 28, 2024, 1:15 p.m.
    ...the integrin from its closed to its open state, activating the receptor. Ligands can bind to integrins in...Cells often express multiple integrins that bind the same ligand, making it difficult to dissect the function...-open. In the two closed states, integrins are inactive, with low affinity for ligands. When integrins...extracellular matrix. During immune responses, this same conformation encourages immune cell adhesion and...IPI antibodies  Antibody Target Proteins Reactivity Isotype Source Species Anti-Integrin alpha...
  14. The PAM Requirement and Expanding CRISPR Beyond SpCas9

    Type
    Blog Post
    Published
    Aug. 20, 2020, 2:30 p.m.
    ... as increased specificity and lower off-target activity (Hu et al., 2018).  In 2020, the Kleinstiver lab...and crRNA (or synthetic gRNA) are derived from the same species. Expanding the CRISPR toolbox The isolation...
  15. CRISPR 101: Homology Directed Repair

    Type
    Blog Post
    Published
    Jan. 26, 2023, 2:15 p.m.
    ...homology-directed genome editing by catalytically active and inactive CRISPR-Cas9 using asymmetric donor DNA. Richardson...by intracellular factors such as nucleases and reactive oxygen species, or external forces such as ionizing... occur; however, if both HJs are resolved in the same manner, this results in a non-crossover event.  ...
  16. Antibodies 101: Introduction to Antibodies

    Type
    Blog Post
    Published
    Jan. 19, 2021, 2:15 p.m.
    ...effect within the body, or they can be used to activate cellular pathways by binding to cell surface receptors... exact amount of protein in your sample, you’ll compare your samples to a standard curve. This curve is...the known samples is used to calculate the concentration of protein in the experimental samples. Get more...multiple proteins on the same cell simultaneously as well as compare between samples. Learn more about flow...of different isotypes can be used together in the same experiment because the reagents used to detect the... population of antibodies that all recognize the same epitope of the target protein. Most commonly these...expression in cell lysates, whole cells, or tissue samples. Many experiments that use antibodies use a primary...
Showing: 221 - 240 of 293 results