It indicates the N-terminal domain of DNA replication factor Dna2 (IPR014808). Dna2 and its plant homolog JHS1 are DNA replication factors that can helicase, act as an ATP-dependent nuclease (5'-flap endonuclease), and ATPase single-stranded DNA. It is necessary for processing Okazaki fragments and is involved in DNA repair pathways. The helicase activity is negligible.