Enables cyclin binding activity. Acts upstream of or within negative regulation of cell population proliferation; negative regulation of cyclin-dependent protein serine/threonine kinase activity; and positive regulation of apoptotic signaling pathway. Predicted to be located in nuclear body. Predicted to be active in cytoplasm. Is expressed in female reproductive system; germ cell of ovary; and ovary. Orthologous to human INCA1 (inhibitor of CDK, cyclin A1 interacting protein 1). [provided by Alliance of Genome Resources, Apr 2022]