STEAP3/TSAP6 protein expression in B-lymphocytic cell lines. Immunoprecipitation followed by Western blot analysis of the STEAP3/TSAP6 protein using anti-mSTEAP3/TSAP6 antibodies. STEAP3/TSAP6 is expressed in both parents but clearly decreased in the derived lymphocytic cell lines of the II.1 and II.2 siblings. Vinculin expression and Ponceau staining are shown for equal loading.