Glycine Quenching
Glycine Quenching - Related Videos
10:57
Quenching and Boiling
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2023
Source: Alexander S Rattner, Sanjay Adhikari, and Mahdi Nabil; Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA Controlled heating followed by rapid cooling is an important element of many materials processing applications. This heat-treating procedure can increase material hardness, which is important for cutting tools or surfaces in high wear environments. The rapid cooling stage is called quenching, and is often performed by immersing...
07:47
Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
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Cited by 7 •
2016
Quorum-quenching enzymes are anti-virulent and anti-bacterial options that can mitigate pathogenesis without risk of incurring resistance, by preventing the expression of virulence factors and genes associated with antibiotic resistance and biofilm formation. In this study, we report a method that demonstrates the efficacy of quorum-quenching enzymes in bacterial biofilm disruption.
08:58
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
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Cited by 28 •
2011
We present an experimental procedure for measuring the partial pressure of oxygen (pO2) in cerebral vasculature based on oxygen-dependent quenching of phosphorescence. Animal preparation and imaging procedures were outlined for both large field of view CCD-based imaging of pO2 in rats and 2-photon excitation based imaging of pO2 in mice.
07:48
Preparing a 68Ga-labeled Arginine Glycine Aspartate (RGD)-peptide for Angiogenesis
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Cited by 3 •
2019
The αvβ3 integrin is a type of adhesion protein that is highly expressed on activated endothelial cells undergoing angiogenesis. Thus, evaluating the integrity of the integrin is of great interest in oncology. Here, we introduce a method to prepare 68Ga-labeled radiopeptides and a method to assess its biological effectiveness.
04:48
A High-throughput Calcium-flux Assay to Study NMDA-receptors with Sensitivity to Glycine/D-serine and Glutamate
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Cited by 1 •
2018
The goal of this protocol is to facilitate the study of NMDA-receptors (NMDAR) at a larger scale and allow the examination of modulatory effects of small molecules and their therapeutic applications.
FAQs
Glycine’s free amino group reacts with unreacted formaldehyde or glutaraldehyde remaining after fixation. This reaction decreases the fixatives’ ability to continue crosslinking biomolecules, a process that can otherwise alter sample chemistry and contribute to background fluorescence. By neutralizing residual aldehyde activity, the treatment supports cleaner fluorescence signals and more reliable visual separation between labeled structures and background.
Residual aldehyde fixatives can continue reacting with biomolecules after the intended fixation step. They may also contribute to background fluorescence, which lowers image contrast and makes specific signals harder to distinguish. In tumor specimens, reducing these effects helps preserve the quality of antigen detection and supports more dependable imaging-based assessment of cancer cells, tissues, and tumor microenvironments.
Fixation establishes the preserved sample state through aldehyde-based crosslinking, whereas glycine quenching acts afterward on fixative that remains unreacted. The two steps therefore serve different purposes: fixation prepares the specimen for analysis, while quenching limits continued fixation and related background effects. Keeping those functions distinct helps researchers place the treatment appropriately within microscopy and staining workflows.
If residual aldehyde is left active, crosslinking may continue beyond the intended fixation period, and background fluorescence may remain elevated. These effects can reduce antigen detection, weaken image contrast, and complicate interpretation of labeled features. For cancer research, such interference may make measurements of tumor cells or tissue organization less reliable, even when the labeling procedure itself is otherwise appropriate.
The treatment is performed after tissue or cell fixation and before immunofluorescence, immunohistochemistry, or imaging-based analysis. This placement allows the initial fixation step to preserve the specimen, followed by neutralization of residual aldehyde activity before signal detection. Applying it at this stage is intended to improve the quality of downstream observations rather than replace fixation.
Glycine quenching can support immunofluorescence, immunohistochemistry, and other imaging-based analyses of tumor specimens. Its value is greatest when researchers need clear antigen detection and adequate contrast to examine cancer cells, tissues, or tumor microenvironments. By limiting fixation-related interference, the step can make microscopy results more suitable for characterization and measurement in cancer studies.
Researchers can assess whether the treated sample shows lower background fluorescence, stronger image contrast, and improved antigen detection. They can also consider whether measurements used to characterize tumor specimens appear more reliable after residual aldehyde activity has been reduced. These outcomes connect the chemical treatment to practical assay performance, particularly in microscopy and other imaging-based cancer research analyses.