tokens: The two isozymes show little amino acid identity in their N-terminal signal sequences but have considerable sequence identity in the C-terminal two-thirds of their proteins .
folded_tokens: the two isozymes show little amino acid identity in their n-terminal signal sequences but have considerable sequence identity in the c-terminal two-thirds of their proteins .
labels: O O B-protein_family_or_group O O B-other_name I-other_name I-other_name O O B-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region O O O O O O O B-protein_domain_or_region I-protein_domain_or_region O O O O