Before revision: A tandem mass tag (TMT) is a chemical label used for mass spectrometry (MS)-based quantification and identification of biological macromolecules such as proteins, peptides and nucleic acids.
After revision: A tandem mass tag (TMT) is a chemical label that facilitates sample multiplexing in mass spectrometry (MS)-based quantification and identification of biological macromolecules such as proteins, peptides and nucleic acids.