VEGF expression in neoplastic and normal prostate tissue. VEGF expression in neoplastic and normal prostate tissue. Representative Western blot analysis showing VEGF expression in CWR22R androgen-independent human prostate xenograft tumor (n = 5) and lack of expression in a normal human prostate specimen (n = 16). Samples were incubated with an antihuman VEGF antibody. Tubulin blot demonstrated equivalent protein loading. William D. Fox et al. Clin Cancer Res 2002;8:3226-3231 ©2002 by American Association for Cancer Research