preferred_name: PGH2 is isomerised to PGE2 by PTGES (Xenopus tropicalis)
preferred_name_lc: pgh2 is isomerised to pge2 by ptges (xenopus tropicalis)
label: PGH2 is isomerised to PGE2 by PTGES (Xenopus tropicalis)
label_lc: pgh2 is isomerised to pge2 by ptges (xenopus tropicalis)