preferred_name: PI is exchanged with PC by PITPNB (Xenopus tropicalis)
preferred_name_lc: pi is exchanged with pc by pitpnb (xenopus tropicalis)
label: PI is exchanged with PC by PITPNB (Xenopus tropicalis)
label_lc: pi is exchanged with pc by pitpnb (xenopus tropicalis)