What is Proteomics the study of?

Proteomics is the study of protein structure and function, which involves analyzing the entire protein content within a biological system, such as a cell, tissue, or organism. This field focuses on understanding the complex interactions of proteins, their functions, and how they contribute to cellular processes. By studying the proteome, scientists can glean insights into how proteins are expressed, modified, and interact with other molecules, which is crucial for understanding the biology of an organism.

In contrast, the other options represent different aspects of biology. DNA sequences focus on the genetic blueprint of organisms; cellular respiration pertains to the biochemical processes that convert nutrients into energy; and gene expression involves the process by which information from a gene is used to synthesize functional products, typically proteins. While these areas are interconnected, they are distinct fields of study separate from proteomics.