Predicted to enable cyclin-dependent protein serine/threonine kinase regulator activity. Predicted to act upstream of or within cell division and mitotic cell cycle phase transition. Predicted to be located in cytoplasm and nuclear membrane. Human ortholog(s) of this gene implicated in several diseases, including breast cancer (multiple); carcinoma (multiple); ductal carcinoma in situ; hepatitis B; and liver cancer (multiple). Orthologous to human CCND2 (cyclin D2).