Predicted to enable ribonucleoprotein complex binding activity. Involved in regulation of hemocyte proliferation. Predicted to be part of PeBoW complex and preribosome, large subunit precursor. Is expressed in several structures, including embryonic/larval midgut primordium; gut section; head epidermis primordium; larval muscle cell; and trunk visceral muscle primordium. Orthologous to human BOP1 (BOP1 ribosomal biogenesis factor).