Fig. 7. Expression patterns of ß1 integrin chains on different cell lineages. Human cell lines of different lineages (Jurkat, T lymphoma; HT1080, fibrosarcoma; MDA-MB-231 breast cancer) were surface labelled with anti-integrin ß1 antibody B3B11 (lanes 1, 4, 7), JB1A (lanes 2, 5, 8) or 12G10 (lanes 3, 6, 9) and the immunoprecipitates were immunoblotted with JB1A. The 120 kDa integrin ß1 were identified in HT1080 and MDA cells by JB1A and 12G10, but not in Jurkat cells.