Migration of hematopoietic progenitor 32D cells expressing t(9;22) translocation products into M2-10B4 spheroids. A. Expression of the transgenes in 32D cells was controlled by Western blot analysis using α-ABL and α-BCR antibodies as indicated. B. Percentage of 32D cells expressing the indicated transgenes that migrated into the spheroids. The bar graphs represent the averages of triplicates with standard deviation. One representative experiment out of three performed is given.