Expression of Id1 is up-regulated in other activated tyrosine kinases. (A) Western blot analysis of either BaF3/TEL-ABL or BaF3/TEL-PDGFβR cells treated with imatinib using Id1 antibody. The membrane was stripped and reblotted with RACK1 antibody as loading control. (B) Comparison of Id1 expression between parental 32Dcl3 cells deprived of IL3 for 6 or 24 hours and 32D/TEL-JAK2 or 32D/TEL-TRKC cells by Western blot analysis using Id1 antibody. The membrane was stripped and reblotted with RACK1 antibody as loading control. (C) Comparison of Id1 expression between parental BaF3 cells deprived of IL3 for 6 or 24 hours and BaF3/TEL-JAK2 or BaF3/TEL-TRKC cells by Western blot analysis using Id1 antibody. The membrane was stripped and reblotted with RACK1 antibody as loading control.