Class II antigen expressing T-cell lines maintained contacts identical to B-cell lines , while class II-negative T-cell lines exhibited no interactions .
class ii antigen expressing t-cell lines maintained contacts identical to b-cell lines , while class ii-negative t-cell lines exhibited no interactions .
B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O O O O B-cell_line I-cell_line O O B-cell_line I-cell_line I-cell_line I-cell_line O O O O