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Protein Folding Quality Check in the RER01:29

Protein Folding Quality Check in the RER

ER is the primary site for the maturation and folding of soluble and transmembrane secretory proteins. The calnexin cycle is a specific chaperone system that folds and assesses the confirmation of N-glycosylated proteins before they can exit the ER lumen. The primary players of this quality check pipeline are the lectins, ER-resident chaperones, and a glucosyl transferase enzyme. In case the calnexin system in the lumen fails to salvage a misfolded protein, it is transported to the cytoplasm...
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An analytical methodology can be divided into four sequential steps: technique, method, procedure, and protocol. A technique is a scientific principle that rationalizes a specific phenomenon through chemical measurements. Adapting a technique for analyzing a sample of interest is termed a method. The procedure outlines the directions for performing the analysis via an analytical method. The protocol is the detailed guidelines on the procedure, which should be strictly followed to obtain the...
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Preparation of Samples for Electron Microscopy

To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
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Quality Assurance

Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
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Molecular Chaperones and Protein Folding

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Iterative Bleaching Extends Multiplicity with Use of Staining Automation for Core Facilities
04:52

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Published on: August 6, 2025

A role for core facilities in improving research rigour.

Alison J North1, Kurt I Anderson2

  • 1Rockefeller University, New York, New York, USA.

Journal of Microscopy
|May 7, 2026
PubMed
Summary

Core facility staff play a crucial role in ensuring scientific reproducibility by leveraging their expertise in training, quality control, and institutional knowledge. Their oversight enhances research integrity and efficiency, often overlooked by traditional reproducibility discussions.

Keywords:
best practicecore facilitylight microscopyquality controlreproducibilityrigourtraining

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Area of Science:

  • Life Sciences
  • Biotechnology
  • Scientific Research Infrastructure

Background:

  • Scientific reproducibility is a key ethical and societal responsibility.
  • Discussions on reproducibility often overlook the vital role of core facility staff.
  • Core facilities act as institutional memory, guiding researchers and preventing unproductive approaches.

Purpose of the Study:

  • To review existing core facility practices that support scientific reproducibility.
  • To suggest additional opportunities for core facility staff to enhance their role in promoting scientific excellence.
  • To highlight the often-underestimated contribution of core facilities to research integrity.

Main Methods:

  • Review of current best practices in core facilities, particularly in light microscopy.
  • Analysis of how core facility operations align with recommendations for improving reproducibility.
  • Identification of areas where core facilities can further contribute to reproducibility.

Main Results:

  • Many core facility best practices, such as instrument quality control and rigorous training, inherently support reproducibility.
  • Core facilities can improve statistical robustness through enhanced awareness and education.
  • Core facility staff possess unique functions in research planning, training, interpretation, and oversight that directly impact reproducibility.

Conclusions:

  • Core facility staff are essential guardians of scientific excellence and reproducibility.
  • Expanding the role of core facilities in reproducibility efforts is critical for scientific integrity.
  • The principles discussed for light microscopy facilities are broadly applicable to other technology-focused core facilities.