Figure 4.

Immunoprecipitation and Western blot analysis of protein lysates isolated from nontransgenic mouse kidney (kid), a primary TAg-induced bladder neoplasm (9–5), and a transplanted bladder neoplasm (3–6). Lysates were immunoprecipitated as indicated at the bottom of the figure. Western blots were probed with anti-TAg antibody. p55 represents mouse immunoglobulin heavy chain, which is precipitated and then visualized on the blot by virtue of its reaction with the anti-mouse Ig secondary antibody reagents.