passages.id: split_5_test_3653_passage
passages.type: progene_text
passages.text: Purified human peripheral T cells or Jurkat T cells were stimulated with Chinese hamster ovary ( CHO ) cells expressing either human CD80 ( CHO - CD80 ) or human CD86 ( CHO - CD86 ) or with anti - CD28 monoclonal antibody ( mAb ) .