preferred_name: PC is exchanged with PI by PITPNB (Dictyostelium discoideum)
preferred_name_lc: pc is exchanged with pi by pitpnb (dictyostelium discoideum)
label: PC is exchanged with PI by PITPNB (Dictyostelium discoideum)
label_lc: pc is exchanged with pi by pitpnb (dictyostelium discoideum)