Proteomics

Proteomics is the comprehensive study of the proteome, defined as the entire complement of proteins expressed by a genome, cell, tissue, or organism at a given time under specific conditions. Unlike the genome, which is relatively static, the proteome is highly dynamic and varies with cell type, developmental stage, and environmental stimuli. Proteomic techniques include two-dimensional gel electrophoresis, mass spectrometry (particularly LC-MS/MS), protein microarrays, and bioinformatic analysis of protein-protein interaction networks. In peptide science, proteomics is essential for understanding how bioactive peptides interact with cellular protein networks, identifying novel peptide targets, and characterising post-translational modifications that affect peptide stability and receptor binding. Proteomic profiling has been used to map the downstream effects of peptides like BPC-157 on growth factor signalling cascades and to identify biomarkers of peptide efficacy. Advances in single-cell proteomics are enabling researchers to study peptide effects at unprecedented resolution.