Adenosine triphosphate (ATP) solution is widely used in biochemical and cellular research as an energy source for enzymatic reactions. It plays a critical role in studying kinase activity, phosphorylation processes, and ATP-dependent enzymes such as ATPases and motor proteins. In cell biology, ATP solutions are essential in assays involving cell signaling, ion transport, and muscle contraction studies. It is also used in molecular biology techniques like luciferase-based bioluminescence assays for detecting microbial contamination or measuring cellular viability. In clinical diagnostics, ATP solutions support tests for platelet function and metabolic disorders. Additionally, ATP is used in vitro to activate purinergic receptors in pharmacological studies exploring inflammation, pain, and cardiovascular regulation.