preferred_name: Excess cysteine yields lanthionine and H2S (Xenopus tropicalis)
preferred_name_lc: excess cysteine yields lanthionine and h2s (xenopus tropicalis)
label: Excess cysteine yields lanthionine and H2S (Xenopus tropicalis)
label_lc: excess cysteine yields lanthionine and h2s (xenopus tropicalis)