tokens: Terminal differentiation of B cells to plasma cells in vivo is characterized by secretion of Ig and extinction of MHC class II expression on the cell surface .
folded_tokens: terminal differentiation of b cells to plasma cells in vivo is characterized by secretion of ig and extinction of mhc class ii expression on the cell surface .
labels: O O O B-cell_type I-cell_type O B-cell_type I-cell_type O O O O O O O B-protein_family_or_group O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O