Fig. 4.
Effect of ouabain on ERK phosphorylation. OK cells were treated for 15 min with ouabain. The cell lysates were subjected to 10% SDS-PAGE, transferred, and probed for p-ERK1/2. The nitrocellulose membranes were stripped and reprobed for total ERK. Phosphorylated and total protein band densities were analyzed by densitometry, and the results (means ± SE from 3 independent experiments) are presented as the ratio of phosphorylated to total protein band density. *P < 0.05 by Student’s t-test.
