Protein expression of total and glutathionylated PTP1B in liver of control and BSO rats. (A) Densitometric analysis of protein abundance after Western blotting. Beta-actin was used for normalization, values of BSO rats were related to values of control rats (= 1.00). Values are means ± SD, n = 10; *Different from control rats at P < 0.05, determined by Student's t-test. (B) Representative bands of total and glutathionylated PTP1B and beta-actin.