Fig. 1. (A) Immunoblots of proteins (10 µg per lane) from renal medulla of control (C), dehydrated (D) and hydrated (H) rats. A distinct band of 70 kD corresponding to the molecular weight of OPN is present. Blots demonstrate increased OPN expression in dehydrated and decreased expression in hydrated kidneys based on comparison of relative optical densities to those of controls (B). *p < 0.05 by t-test.
