Involved in entrainment of circadian clock by photoperiod and protein ubiquitination. Located in cytosol and nucleus. Part of SCF ubiquitin ligase complex. Is expressed in gonad; metanephros; nervous system; and stomach. Orthologous to human FBXL21P (F-box and leucine rich repeat protein 21, pseudogene). [provided by Alliance of Genome Resources, Apr 2022]