N-Terminal sequencing ( 20 amino acids ) shows that p56 is a unique human protein .
n-terminal sequencing ( 20 amino acids ) shows that p56 is a unique human protein .
B-other_name I-other_name O B-peptide I-peptide I-peptide O O O B-protein_molecule O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O