Catabolite activator proteins (CAPs) are essential regulatory molecules involved in various cellular processes, particularly in bacteria. Synonyms for CAPs encompass other terms that describe its functionality and role. One frequently used term is cyclic AMP receptor protein (CRP), as CAPs specifically bind to cyclic AMP (cAMP) and facilitate gene expression in the presence of this molecule. Additionally, CAPs are sometimes referred to as catabolite gene activator proteins due to their role in activating genes involved in catabolic pathways. These synonyms highlight the key characteristics and functions of CAPs, providing a clearer understanding of their significance within the realm of cellular regulation.