PRKCD and bronchiolitis obliterans syndrome: Phosphorylation of PKCδ on tyrosine 311 was significantly increased in the BO-group (Control vs. BO; 100 ± 21 vs. 150 ± 20%, P < 0.01 vs. Control), and the increase was suppressed by Cap (BO vs. BO + Cap; 150 ± 20 vs. 93 ± 14%, P < 0.01 vs. BO) (Fig. 6A).