The term "cAMP Response Element Binding Protein" (CREB) refers to a crucial transcription factor in biology. CREB plays a vital role in regulating gene expression in response to cellular signals, especially those mediated by cyclic adenosine monophosphate (cAMP). However, there exist various synonymous terms used to portray this essential protein. One common synonym for CREB is "phospho-CREB", representing its activated form when phosphorylated by protein kinases. Additionally, "CRE-Binding Protein" is another interchangeable phrase used to describe CREB since it binds to specific DNA sequences called cAMP response elements (CREs). Overall, these synonyms accurately depict and represent the key functions and characteristics of the cAMP Response Element Binding Protein.