Predicted to enable cyclin-dependent protein serine/threonine kinase regulator activity and protein kinase binding activity. Acts upstream of or within several processes, including adult locomotory behavior; cellular response to X-ray; and long-term memory. Located in cytoplasm and nucleus. Part of cyclin D2-CDK4 complex. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Human ortholog(s) of this gene implicated in ductal carcinoma in situ; invasive lobular carcinoma; prostate cancer; and transitional cell carcinoma. Orthologous to human CCND2 (cyclin D2). [provided by Alliance of Genome Resources, Apr 2022]