MS2 Quantification by Isotope Labeling

**Semantic type:** Conceptual Entity

**Definition:** A proteomic quantitation method where isotopically-labeled peptides are quantified during a second round of mass spectrometry (tandem mass spectrometry).

**Synonyms:** - Data-Dependent Fragmentation Spectra - MS2 Label-Based Quantification - MS2 Label-Based Quantitation - MS2 Tag-Based Quantification - MS2 Tag-Based Quantitation