To confirm that keratin 9 was expressed in the T24 bladder cancer cells, immunostaining was conducted to assess the subcellular distribution of keratin 9 and Hsp70, using a keratin 9 monoclonal antibody and the same Hsp70 monoclonal antibody used in the co-immunoprecipitation experiment (Fig. 4). The gene discussed is KRT9; the disease is urinary bladder carcinoma.