FIG. 5.

Immunoblot analysis of Myb-transformed cells. To test for expression of Myb proteins in hematopoietic cells transformed by the proteins outlined in Fig. 1, 10⁶ cells from each sample were lysed and separated by SDS-PAGE, and proteins were detected with a mixture of Myb monoclonal antibodies (2.2, 2.7, and 5E). The relative mobilities of molecular weight markers are indicated to the left in kilodaltons.