passages.id: split_4_test_2655_passage
passages.type: progene_text
passages.text: MHC-I and-II , ICAM-1 ( CD54 ) , NCAM ( CD56 ) , and Thy-1 ( CDw90 ) immunoreactivity was studied in eight primary Rb biopsy specimens using immunohistochemistry , three using immunoelectron microscopy , and six Rb cell lines using flow cytometry ( FCM ) .