preferred_name: Duplex siRNA is loaded into Argonaute (Xenopus tropicalis)
preferred_name_lc: duplex sirna is loaded into argonaute (xenopus tropicalis)
label: Duplex siRNA is loaded into Argonaute (Xenopus tropicalis)
label_lc: duplex sirna is loaded into argonaute (xenopus tropicalis)