tokens: The prolactin receptor , a member of the hematopoietin/cytokine receptor superfamily , is ubiquitously expressed by cells in the immune system .
folded_tokens: the prolactin receptor , a member of the hematopoietin/cytokine receptor superfamily , is ubiquitously expressed by cells in the immune system .
labels: O B-peptide O O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O O O B-body_part I-body_part O