Quantification of proteins from proteomic analysis

After protein identification, the quantification of proteins is one of the fundamental applications of proteomics. Accurate quantification has the potential to yield insights of the biology of organisms and most especially the reaction to changes in the internal or external environment. Mass spectrometry and subsequent informatics has also played a significant role in revolutionising, allowing thousands of proteins to be quantified in a single experiment. This article briefly discusses the most commonly used protein quantification methodologies in proteomics and provides a worked case study of protein quantification analysis using freely available tools of publicly available Data Independent Acquisition mass spectrometry (DIA-MS) data.