Related Experiment Video
Updated: May 21, 2026

07:18
Intracellular Refolding Assay
Published on: January 24, 2012
Summary
Omnia Ismaiel
Area of Science:
- Bioanalytical chemistry
- Mass spectrometry
- Biomarker analysis
Background:
- Investigating matrix effects in liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) bioanalysis.
- Evaluating lipid interference in bioanalytical assays.
- Developing advanced separation techniques for peptide analysis.
Discussion:
- Focus on solid-phase microextraction and 2D Ultra Performance Liquid Chromatography (UPLC) for peptide LC-MS/MS.
- Collaboration with Waters Corporation on a novel 2D UPLC instrument prototype.
- Developing LC-MS/MS assays for cerebrospinal fluid (CSF) β-amyloid peptides.
Key Insights:
- Advanced LC-MS/MS assays for β-amyloid biomarkers are nearing validation for Alzheimer's disease diagnosis.
- Successful development of a 2D UPLC system for enhanced peptide separation.
- Significant contributions to understanding and mitigating matrix effects in bioanalysis.
Outlook:
- Method validation for three Alzheimer's disease biomarker assays.
- Collaboration with the Global Biomarker Standardization Consortium for Alzheimer's Association.
- Advancing bioanalytical techniques for neurodegenerative disease research.
Related Concept Videos
Enzyme-Linked Immunosorbent Assay
In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen. Enzyme-substrate reaction allows the antigen to be visualized or quantified.
There are many different types of ELISAs, but they all involve an antibody molecule whose constant region binds an enzyme, leaving the variable region free to bind its specific antigen. Enzyme-substrate reaction allows the antigen to be visualized or quantified.
Proteomics
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Microbial Biosensors
Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

