What does 2ADP mean?

2ADP typically refers to two molecules of adenosine diphosphate (ADP). ADP is an important nucleotide involved in energy transfer within cells, serving as a precursor to adenosine triphosphate (ATP), the primary energy carrier. In biochemical contexts, 2ADP may indicate a specific reaction or process involving two ADP molecules, such as during certain metabolic pathways or enzymatic reactions.