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Western blot analysis of wild-type and mutant Sbf1 proteins. Proteins prepared from whole-cell extracts were analyzed by immunoblotting by using an anti-Sbf1 mAb. Sources of proteins are indicated above the gel lanes. Transfected bone marrow cells were analyzed 4–6 weeks postinfection. Exogenous Sbf1ΔN displays a migration different from endogenous Sbf1.
