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Related Concept Videos

Proteomics01:33

Proteomics

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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...
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Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
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Protein-protein Interfaces02:04

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Protein and Protein Structure02:15

Protein and Protein Structure

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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
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Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
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Author Spotlight: Advancing the Analysis of Plasma Extracellular Vesicle Proteome for Cardiovascular Biomarker Studies
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Proteomics techniques in protein biomarker discovery.

Mahsa Babaei1, Soheila Kashanian2,3, Huang-Teck Lee4

  • 1Department of Biology Faculty of Science Razi University Kermanshah Iran.

Quantitative Biology (Beijing, China)
|February 12, 2026
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Summary

Protein biomarkers are crucial for cancer diagnosis. This study reviews advancements in discovering, verifying, and validating these biomarkers using proteomics techniques like mass spectrometry and immunoassays.

Keywords:
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Area of Science:

  • Biochemistry
  • Proteomics
  • Cancer Diagnostics

Background:

  • Protein biomarkers have been vital in cancer diagnosis and care for over 50 years.
  • Advancements in proteomics have yielded thousands of potential protein biomarkers for various diseases.
  • Proteomics diagnosis involves sample pretreatment, purification, and analysis using advanced techniques.

Purpose of the Study:

  • To investigate recent improvements in protein biomarker discovery, verification, and validation.
  • To discuss the advantages and disadvantages of conventional proteomics techniques.
  • To highlight the role of mass spectrometry and other methods in biomarker development.

Main Methods:

  • Utilized mass spectrometry (MS) for protein identification and quantification.
  • Explored multiple reaction monitoring (MRM), parallel reaction monitoring (PRM), and selected reaction monitoring (SRM) for biomarker verification.
  • Considered enzyme-linked immunosorbent assay (ELISA) for biomarker validation.

Main Results:

  • Mass spectrometry is a critical technique for identifying and quantifying candidate biomarkers.
  • Verification and validation are essential post-discovery to minimize false positives, especially with large sample sets.
  • MRM, PRM, SRM with stable isotope-labeled internal standards, and ELISA are key methods for verification and validation.

Conclusions:

  • Recent improvements enhance the reliability of protein biomarker discovery and validation.
  • Careful selection of verification and validation techniques is crucial for accurate cancer diagnostics.
  • The study provides insights into the evolving landscape of proteomics in clinical applications.