This collection features various methods and techniques used to study protein-protein interactions. These approaches encompass scientific tools and technologies, such as biosensors, imaging techniques, assays, and spectroscopy, that provide insights into the intricate world of protein interactions and their roles in biological systems, enabling a deeper understanding of the events that transpire at the molecular level. These interactions are fundamental in numerous cellular activities, including signal transduction, enzymatic reactions, gene regulation, and structural organization.