Isotope Labeling
Isotope Labeling — The incorporation of stable or radioactive isotopes into peptides for tracking, quantification, or structural studies by mass spectrometry or NMR.
What Is Isotope Labeling?
Isotope labeling incorporates stable (²H, ¹³C, ¹⁵N, ¹⁸O) or radioactive (³H, ¹²⁵I, ¹⁴C) isotopes into peptides for detection, quantification, or structural studies. Stable isotope-labeled peptides serve as internal standards for absolute LC-MS/MS quantification, while radioactive labels enable binding assays and biodistribution studies.
Applications
- SIL-IS: Stable isotope-labeled internal standard peptides for clinical biomarker quantification
- SILAC: Metabolic labeling with heavy amino acids for quantitative proteomics
- NMR: ¹³C/¹⁵N uniform labeling for structural studies of larger peptides
Frequently Asked Questions
What is Isotope Labeling?
The incorporation of stable or radioactive isotopes into peptides for tracking, quantification, or structural studies by mass spectrometry or NMR.
Why is Isotope Labeling important in peptide research?
Isotope Labeling is a fundamental concept in analytical as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.
Authority Sources
- Isotope Labeling on Wikipedia
- Search Isotope Labeling on PubChem (NIH)
- Research articles on ScienceDirect