2-Deoxyadenosine-5-triphosphate-15N5 (dATP-15N5) dilithium is 15N labeled 2-Deoxyadenosine-5-triphosphate (HY-136648). 2-Deoxyadenosine-5-triphosphate (dATP) is a nucleotide used in cells for DNA synthesis (or replication), as a substrate of DNA polymerase.