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Related Concept Videos

Quantitative Analysis01:12

Quantitative Analysis

1.5K
Quantitative analysis is a technique for measuring the amount of specific constituents in a sample. When the sample's composition is unknown, qualitative analysis is performed first to identify its components, which ensures that the correct substances are measured during the quantitative phase.
In quantitative analysis, two key measurements are made: the sample quantity and a property proportional to the amount of the analyte (the substance being analyzed). This forms the basis of the...
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Protein-protein Interfaces02:04

Protein-protein Interfaces

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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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What are Proteins?01:55

What are Proteins?

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Overview
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Protein Networks02:26

Protein Networks

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Updated: Feb 9, 2026

Quantitative Autoradiographic Method for Determination of Regional Rates of Cerebral Protein Synthesis In Vivo
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Protein Quantitation.

Edward A Greenfield

    Cold Spring Harbor Protocols
    |June 3, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Accurately quantify protein samples using established colorimetric assays or UV detection methods. This overview details seven essential techniques for reliable protein measurement in research.

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    Area of Science:

    • Biochemistry
    • Analytical Chemistry

    Background:

    • Accurate protein quantification is crucial for various biological and chemical analyses.
    • Established methods provide reliable means for determining protein concentration.

    Purpose of the Study:

    • To outline and describe seven key methods for protein sample quantification.
    • To provide a reference for researchers selecting appropriate protein measurement techniques.

    Main Methods:

    • Colorimetric assays, including bicinchoninic acid (BCA), Bradford, and Lowry assays.
    • Ultraviolet (UV) detection methods, exemplified by NanoDrop technology.
    • Comparison and application of seven distinct protein quantification strategies.

    Main Results:

    • Detailed descriptions of seven protein quantification methods are presented.
    • The applicability and principles of each method are explained.

    Conclusions:

    • Selection of the appropriate protein quantification method depends on experimental needs.
    • Both colorimetric and UV-based techniques offer valuable approaches for protein measurement.