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We narrowed to 389 results for: control

Showing: 61 - 80 of 389 results

  1. Antibodies 101: The Basics of Western Blotting

    Type
    Blog Post
    Published
    March 8, 2021, 2:41 p.m.
    ...possible, include positive and negative controls. Positive controls typically include cell lines or tissues...validated applications, pay close attention to the controls listed on the vendor’s website. Typically, the...levels (not overexpression systems) while negative controls are those that do not naturally express the protein...note, however, that you must include a loading control when assessing protein abundance or comparing samples... samples across lanes.  For a typical loading control the membrane is probed with an antibody that detects...transfer causes inconsistent levels of the loading control. In these cases, the western should be repeated...care to include the proper positive and negative controls, choose antibodies that are validated for your...

  3. Stabilized Bacterial Promoters: Constant Gene Expression at any Copy Number

    Type
    Blog Post
    Published
    Sept. 4, 2018, 12:53 p.m.
    ...input signal that both positively and negatively controls the output. In this case, plasmid copy number .... placed a trans-acting RepA protein under the control of IPTG. Because RepA is a plasmid replication ...Segall-Shapiro et al. placed the genes under the control of a constitutive promoter and then moved them ...decreased. But when the genes were placed under the control of a stabilized promoter, deoxychromoviridans titers...the joys of a p-value < 0.05, having such fine control of gene expression is useful for many metabolic...

  4. It’s Bioelectric! An Exciting Interdisciplinary Field of Research

    Type
    Blog Post
    Published
    Oct. 29, 2019, 2:52 p.m.
    ...living cells. Since bioelectrical signals are controlled by the opening and closing of ion channel proteins...genetically encoded, light-gated ion translocators to control tumorigenesis." Oncotarget 7.15 (2016): 19575. ...signaling networks: exploiting voltage gradients for control of growth and form." Annual review of biomedical... neural and gap junction protein-mediated cues control polarity during planarian regeneration." Developmental...Vaibhav P., et al. "Transmembrane voltage potential controls embryonic eye patterning in Xenopus laevis." Development...

  5. How Dry Ice Affects Viral Vector Sample pH & How to Avoid It

    Type
    Blog Post
    Published
    June 20, 2017, 2:30 p.m.
    ... pH. We compared the dry ice-stored samples to controls that were only stored in a -80°C freezer and not...). Before thawing, all the samples were at the control pH of 7.4 as indicated by color (data not shown...thaw. We compared vented and non-vented tubes to controls that were not exposed to dry ice. Does venting...between 0 and 96 hours. We compared these samples to controls that were only stored at -80°C. We then thawed...period of at least 96 hours had the same pH as control tubes that were never stored on dry ice/exposed...

  6. CRISPR Meets Synthetic Biology: A Conversation with MIT’s Christopher Voigt

    Type
    Blog Post
    Published
    April 22, 2015, 2:06 p.m.
    ...biology - even a piece of wood - there’s a lot of control spatially as to what’s happening at different points...cellulose fibers, pattern, shape. All of that is controlled by regulatory networks in the plant. If we want... hundreds of genes and regulation and resource control - everything that’s necessary on that scale.  If... terminators. That gives us enough hardware to control hundreds of genes. We’ve created enough regulatory...transcriptional and translational activity a cell has and control how much it taxes the resources of a cell. The ...

  7. Pooled CRISPR Libraries Offer Genome-Wide Control for Large-Scale Functional Screens

    Type
    Blog Post
    Published
    Feb. 24, 2015, 7:50 p.m.
    ...for gene control over a 1,000-fold range. Weissman explained that there are two levels of control in the...technology has changed how scientists edit and control genes, but according to the Broad Institute's Silvana...Epub 2014 Dec 10. Genome-Scale CRISPR-Mediated Control of Gene Repression and Activation. Gilbert LA, ...

  8. Antibodies 101: The Four ELISAs and When to Use Them

    Type
    Blog Post
    Published
    July 25, 2024, 1:15 p.m.
    ... it is essential to include proper controls. As a positive control, include a sample that is known to ...This method also requires more optimization and controls when developing, as secondary antibodies can also..., purified protein, or a peptide. The positive control will confirm that the procedure is working and ...and should always be included.  For a negative control, include a sample that does not contain the target...where the target is not expressed. The negative control will help you determine if there is non-specific...

  9. New Viral Vectors - Spring 2025

    Type
    Blog Post
    Published
    April 29, 2025, 1:30 p.m.
    ...pAAV-CAG-emiRFP670 AAV1 Control Kiryl Piatkevich New viral tool pAAV-S5E6-dTom-nlsdTom AAV1 Control Jordane Dimidschstein...the retrograde serotype, and a dTomato under the control of the E6 regulatory element, which targets it ...

  10. New Viral Vectors - Summer 2024

    Type
    Blog Post
    Published
    July 9, 2024, 1:15 p.m.
    ... AAV9 Controls Jensen New serotype pAAV-CAG-2xNLS-tdTomato-WPRE-hGHpolyA AAV9, PHP.eB Controls Feng ...serotypes pAAV-hSyn-GRAB_OTmut AAV9 Biosensors (Control) Li New viral service pAAV-hSyn-GRAB_ACh3.0 AAV9...

  11. Plasmid Grant to Aid Cervical Cancer Screening in Ghana

    Type
    Blog Post
    Published
    Nov. 8, 2016, 3:30 p.m.
    ...grant to order plasmids she can use as positive controls in PCR-based cervical cancer screens. This third...predominantly HPV 16 and 18.” HPV plasmids as positive controls To start her work, Gladys will improve cervical... containing a variety of HPV genes as positive controls in her PCR screens. She hopes that these screens...

  12. Getting Started with Behavioral Neuroscience: Standardizing Experiments and Using Viral Vectors

    Type
    Blog Post
    Published
    Aug. 20, 2019, 12:31 p.m.
    ..., behavioral neuroscientists can now precisely control where and when certain genes are expressed to investigate... in a laboratory, a high level of experimental control is required, because seemingly tiny external factors...Experimenter Interaction should be minimal and strictly controlled; optional handling animals Experiment Behavioral...neurotrophic factors. Another option uses optogentics to control neuronal activity, commonly via light-activated...Viral vectors allow a tight spatial and temporal control of gene expression manipulation. They are injected...

  13. Tips for Titering Your Lentiviral Preps

    Type
    Blog Post
    Published
    March 15, 2016, 2:30 p.m.
    ...method can be the absence of suitable controls. The best control for this type of assay is a clonal cell...using a reverse transcriptase mutant in a separate control reaction. This will allow you to quantify the amount...of the qPCR target gene. Developing the proper control line typically requires transducing with a limiting.... 3. Zhang, Bing, et al. "The significance of controlled conditions in lentiviral vector titration and...

  14. New and Upcoming Viral Vectors - Spring 2019

    Type
    Blog Post
    Published
    March 26, 2019, 1:40 p.m.
    ...cre-dependent version at Addgene! Fluorescent protein and control AAV These fluorescent protein expression vectors...interneurons. These vectors can also be used as the control vectors for experiments encoding a fluorescent-... Addgene in the next 6 months, pending quality control. For an estimate on availability date or to be ... and serotype you’d like to be notified about. Controls Plasmid Serotype Name 114472  AAV5, AAV8 ...

  15. Hot Plasmids and Viral Preps - July 2021

    Type
    Blog Post
    Published
    July 27, 2021, 1:15 p.m.
    ...for doing gene targeting, reporter generation, controllable gene knockouts, and inducible gene inactivation...design. B) Strategy for leak-free transcriptional control. C) Iterative transduction workflow overview. Image...SL-insensitive fluorophore (LSSmOrange) as an internal control and a SL-sensitive fluorophore (circularly permuted...the cpGFP without altering that of the internal control (Fig 1). Because this method relies on the fluorescence...

  16. Addgene's Top 10 Blog Posts of 2015

    Type
    Blog Post
    Published
    Dec. 7, 2015, 6 p.m.
    ... 10. Plasmids 101: Control Plasmids Need help thinking about the types of controls you’ll need for your...provides researchers with many different ways to control gene expression. Get the full scoop from Addgenie...Addgenie Chari Cortez guides us through some common controls and why you might need them. Happy Reading!   ...

  17. AAV Packaged on Request is Here!

    Type
    Blog Post
    Published
    Jan. 10, 2025, 1:01 p.m.
    ...necessary MTA, then start production and quality control.  Our packaged on request AAV service uses the ...the same trusted production and quality control processes as our in-stock service: ddPCR, purity testing...blog post on viral vector production and quality control, our AAV Packaged on Request webpage, or our announcement...

  18. Antibodies 101: Multiplex Immunofluorescence

    Type
    Blog Post
    Published
    May 23, 2023, 1:15 p.m.
    ...colors you like. Controls and validation Can’t forget the controls! The necessary control experiments will...from Addgene), or be prepared to run some extra controls and validate the antibody yourself. If you can... we’ll walk you through the necessary types of controls for a multiplex experiment.  Check for non-specific...using a different antibody.  Prepare a positive control Prepare and label a sample that expresses your ...naturally or by overexpression, for a positive control. You can also confirm the secondary works as expected...

  19. Plasmids 101: Plasmid Incompatibility

    Type
    Blog Post
    Published
    March 31, 2020, 1:15 p.m.
    ... the origin of replication and the replication control machinery (Need a refresher on the Origin of Replication... because they compete for the same replication control machinery within the cell. Most plasmids encode...two models for iteron-based plasmid replication control that are not necessarily mutually exclusive. In...plasmids, different negative regulation systems control plasmid replication of each plasmid using unique... complex than simply competing for replication control factors and tends to be more of a concern with ...Espinosa M, Díaz-Orejas R (1998) Replication and Control of Circular Bacterial Plasmids. Microbiology and...

  20. Antibodies 101: Introduction to Immunofluorescence

    Type
    Blog Post
    Published
    Nov. 16, 2021, 2:15 p.m.
    ...include controls to show that your antibodies are binding specifically. For positive controls, aim to ... and isotype controls are also commonly used in IF experiments. Precisely which controls you perform will...been manipulated to overexpress it. For negative controls, use samples in which the target is known to be...research antibodies, protocols, and appropriate controls and you will be well on your way to performing...
Showing: 61 - 80 of 389 results