Fig. 2. FTY720-P activates PKC. (A) Cells were pre-treated 30 min before FTY720-P (7.5nM. 2hours) with the PKC inhibitor calphostin C (50 nM,). (B) Effect of PMA (100nM, 2hours), an activator of PKC on the activity of the Na⁺/K⁺ ATPase. Values are means ± SEM of at least 3 observations. Bars not sharing a common letter are considered significantly different from each other at p<0.01.