cAMP receptor protein, also known as CRP, is a vital cellular component involved in gene regulation. Synonymous terms for this protein include CAP (catabolite activator protein) and cAMP-dependent transcriptional regulator. Encoded by the crp gene, this protein binds to cyclic adenosine monophosphate (cAMP) to form a complex that modulates gene expression in response to cellular energy levels. CAP, the first identified name for this protein, reflects its role in activating enzymes involved in glucose metabolism. Moreover, the term cAMP-dependent transcriptional regulator highlights its function as a key player in regulating the transcription of specific genes. Together, these synonyms effectively describe the role and significance of cAMP receptor protein in cellular processes.