preferred_name: Formation of the outer ring of the 20S core particle (Xenopus tropicalis)
preferred_name_lc: formation of the outer ring of the 20s core particle (xenopus tropicalis)
label: Formation of the outer ring of the 20S core particle (Xenopus tropicalis)
label_lc: formation of the outer ring of the 20s core particle (xenopus tropicalis)