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