Involved in larval lymph gland hemopoiesis and wing disc dorsal/ventral pattern formation. Predicted to be active in nucleus. Is expressed in several structures, including central brain primordium; embryonic/larval midgut; embryonic/larval midgut primordium; ganglia; and larval nervous system. Orthologous to human SARNP (SAP domain containing ribonucleoprotein).