Acts upstream of or within several processes, including in utero embryonic development; positive regulation of fibroblast proliferation; and regulation of cell cycle phase transition. Part of ribonuclease H2 complex. Is expressed in several structures, including brain; gut; hemolymphoid system; skin; and testis. Human ortholog(s) of this gene implicated in Aicardi-Goutieres syndrome. Orthologous to human RNASEH2B (ribonuclease H2 subunit B). [provided by Alliance of Genome Resources, Apr 2022]