Adenylic acid, also known as adenosine monophosphate (AMP), is a nucleotide molecule that plays a crucial role in cellular energy metabolism and signalling pathways. Synonyms for adenylic acid include adenylate, 5'AMP, and adenosine-5'-monophosphate. Adenylate is used as a substrate in many enzymatic reactions, including the synthesis of adenosine triphosphate (ATP) - the primary energy source for cellular processes. 5'AMP is a component of cyclic AMP (cAMP) - a key second messenger molecule that regulates cellular responses to hormones and neurotransmitters. The term adenosine-5'-monophosphate is used interchangeably with adenylic acid, and refers to the chemical structure of the molecule as a phosphorylated adenine nucleotide with a single phosphate group.