INS2, also named as DNA replication complex GINS protein PSF2, CGI-122, DC5, or HSPC037, is a 185 amino acid protein, which belongs to the GINS2/PSF2 family. The GINS complex plays an essential role in the initiation of DNA replication, and progression of DNA replication forks. GINS complex seems to bind preferentially to single-stranded DNA. GINS2 is a part of the the GINS complex, an integral component of the replicative helicase machinery that facilitates progression of the replisome complex.