tokens: Its extracellular domain is composed of four cysteine-rich domains , and the cytoplasmic region contains a death domain known to signal apoptosis .
folded_tokens: its extracellular domain is composed of four cysteine-rich domains , and the cytoplasmic region contains a death domain known to signal apoptosis .
labels: O O O O O O O B-protein_domain_or_region I-protein_domain_or_region O O O B-protein_domain_or_region I-protein_domain_or_region O O B-protein_domain_or_region I-protein_domain_or_region O O B-other_name I-other_name O