ASK, CHIF, DBF4, DBF4 zinc finger A, DBF4A, ZDBF1.
Regulatory subunit for CDC7 which activates its kinase activity thereby playing a central role in DNA replication and cell proliferation. Required for progression of S phase. The complex CDC7-DBF4A selectively phosphorylates MCM2 subunit at Ser-40 and Ser-53 and then is involved in regulating the initiation of DNA replication during cell cycle.