1. The comprehensive analysis of the identity, interactions and locations of proteins within a cell: "Targeted proteomics refers to the detection, quantification and characterization of specific proteins of interest in biological samples."
2. The analysis of the expression, localization, functions, and interactions of the proteins produced by the genes of an organism: "Proteomics involves the qualitative and quantitative study of the proteome (complete set of proteins produced from the information encoded in a genome) under various conditions, including protein expression, modification, localization, and function; as a means of understanding various biological processes."

"Proteomics aims to work out the differences in protein action between diseased cells and healthy ones."

"One objective of proteomics is to find chemical markers to determine what’s going wrong when disease strikes and to diagnose disorders; another, is to find methods of gene therapy that will cure the problems at the level of the DNA in human genes."

"The term proteomics was coined in 1994 by Marc Wilkins, Professor in the School of Biotechnology and Biomolecular Sciences at the University of New South Wales, Sydney, Australia; who defined it as 'the study of proteins, how they're modified, when and where they're expressed, how they're involved in metabolic pathways and how they interact with one another.' "