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Related Concept Videos

Quantitative Analysis01:12

Quantitative Analysis

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 method...
Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
Mass Spectrometry of Amines01:15

Mass Spectrometry of Amines

In mass spectroscopy, amines undergo fragmentation to give parent ions with odd molecule weights. This observed mass spectrum follows the nitrogen rule; a molecule with an odd number of nitrogen atoms produces a molecular ion with an odd molecular weight. Amines undergo fragmentation through α cleavage, producing nitrogen-containing cations—iminium ions—and alkyl radicals. Mass spectra of aromatic and cyclic aliphatic amines exhibit strong molecular ion peaks, but acyclic aliphatic amines show...
Qualitative Analysis01:10

Qualitative Analysis

Qualitative analysis is the process of identifying elements, ions, or compounds in an unknown sample. It is the first and most fundamental type of analysis based on the hierarchy of analytical goals. This hierarchy is significant as it provides a structured approach to scientific research, with qualitative analysis serving as the initial step, providing essential information before moving on to quantitative or other forms of analysis.
There are two main approaches to qualitative analysis:...

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Updated: Jun 3, 2026

Purification and Analytics of a Monoclonal Antibody from Chinese Hamster Ovary Cells Using an Automated Microbioreactor System
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Purification and Analytics of a Monoclonal Antibody from Chinese Hamster Ovary Cells Using an Automated Microbioreactor System

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Quantitative amino acid analysis.

Shane M Rutherfurd1, Benn M Dunn2

  • 1Riddet Institute, Massey University, Palmerston North, New Zealand.

Current Protocols in Protein Science
|March 15, 2011
PubMed
Summary
This summary is machine-generated.

Quantitative amino acid analysis provides crucial data for protein characterization and nutritional assessment. Despite past challenges, advancements in core laboratories offer reliable amino acid composition data for broader scientific application.

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Quantification of Proteins Using Peptide Immunoaffinity Enrichment Coupled with Mass Spectrometry
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Last Updated: Jun 3, 2026

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Quantification of Proteins Using Peptide Immunoaffinity Enrichment Coupled with Mass Spectrometry

Published on: July 31, 2011

Area of Science:

  • Protein chemistry
  • Food science
  • Nutritional science

Background:

  • Quantitative amino acid analysis is vital across disciplines, including recombinant protein characterization and food protein nutritional assessment.
  • Historically, reliable amino acid composition data has been difficult to obtain, leading to its underutilization in many labs.
  • Advancements in protein chemistry core laboratories now provide precise instrumentation for accurate amino acid analysis.

Purpose of the Study:

  • To highlight the significance of quantitative amino acid analysis in various scientific fields.
  • To address the challenges and solutions related to obtaining reliable amino acid composition data.
  • To illustrate the types of information and calculations derivable from quantitative amino acid analysis.

Main Methods:

  • Utilizing advanced instrumentation from protein chemistry core laboratories for precise peptide and protein analysis.
  • Applying quantitative amino acid analysis techniques for detailed food protein characterization.
  • Performing necessary calculations to derive meaningful nutritional and compositional data from amino acid profiles.

Main Results:

  • Demonstration of how quantitative amino acid analysis yields essential data beyond simple nitrogen content.
  • Highlighting the increasing adoption of amino acid analysis in nutrition laboratories for accurate nutritional adequacy assessment.
  • Providing examples of calculations for interpreting amino acid composition data.

Conclusions:

  • Quantitative amino acid analysis is an indispensable tool for accurate protein characterization and nutritional evaluation.
  • Modern instrumentation has overcome previous technical hurdles, making reliable amino acid data more accessible.
  • The detailed insights from amino acid analysis are crucial for understanding protein quality and nutritional adequacy.