Bauer, K.
, Phinney, K.
and Turko, I.
(2015),
QconCAT: Internal Standard for Protein Quantification, Isotope labeling of biomolecules Part A & B, Methods in Enzymology (Elsevier), Oxford, -1, [online], https://doi.org/10.1016/bs.mie.2015.09.022
(Accessed October 9, 2025)
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QconCAT: Internal Standard for Protein Quantification
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Abstract
Protein quantification based on stable-isotope labeling mass spectrometry (SIL-MS) involves adding known quantities of stable-isotope labeled internal standards into biological samples. The internal standards are analogous to analyte molecules and quantification is achieved by comparing signals from isotope-labeled and analyte molecules. This methodology is broadly applicable to proteomics research, biomarker discovery and validation, and clinical studies; which require accurate and precise protein abundance measurements. One such internal standard platform for protein quantification are concatenated peptides (QconCAT). This paper describes a protocol for the design, expression, characterization, and application of the QconCAT strategy for protein quantification.Citation
Isotope labeling of biomolecules Part A & B
Volume
566
Publisher Info
Methods in Enzymology (Elsevier), Oxford, -1
Pub Type
Book Chapters
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Keywords
QconCAT, stable isotope labeling, mass spectrometry, proteomics, protein quantification, protocol
Citation
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Created October 21, 2015, Updated November 10, 2018