tokens: Twenty-two differences from the human sequence were found in the N-terminal region ( amino acids 1-421 ) of the squirrel monkey receptor .
folded_tokens: twenty-two differences from the human sequence were found in the n-terminal region ( amino acids 1-421 ) of the squirrel monkey receptor .
labels: O O O O O O O O O O B-protein_domain_or_region I-protein_domain_or_region O B-protein_domain_or_region I-protein_domain_or_region I-protein_domain_or_region O O O B-multi_cell I-multi_cell O O