Guanosine 5'-diphosphate sodium salt is widely used in biochemical research and pharmaceutical development. It serves as a crucial substrate in enzymatic studies, particularly those involving kinases and other nucleotide-dependent enzymes. In cell signaling research, it plays a role in studying G-protein-coupled receptors and their activation pathways. Additionally, it is utilized in the synthesis of RNA and DNA, aiding in understanding nucleic acid metabolism. Its application extends to drug discovery, where it helps in identifying potential therapeutic targets related to nucleotide metabolism and cellular signaling processes.