Fig. 4From: Discovery and cellular stress pathway analysis of 1,4-naphthoquinone derivatives with novel, highly potent broad-spectrum anticancer activityImmunoblot analysis of induction of stress (a) and/or apoptotic cell death (b) pathways in A375 cells by treatment with Pyr-1 at indicated time points. β-actin expression served as loading control. Quantitation of differential protein expression levels in treated relative to untreated control cells (arbitrarily set at 1) are indicated in boxes where observedBack to article page