Fig. 4.

 Cytoprotection of Hsp72 vs heat stress after adenosine triphosphate (ATP) depletion. Total deoxyribonucleic acid (DNA) content before and 3 days after 1.5 hours of ATP depletion. Mean DNA content (± SE) is depicted in cells transfected with human Hsp72 in the absence of isopropyl-β-d-thiogalactoside (IPTG) (open bars), in the presence of IPTG (darkly shaded bars), or in wild-type cells 16 hours after transient heat stress (stippled bars). * P < 0.05 pre- vs post-ATP depletion; ** P < 0.05 for transfected cell in the presence of IPTG vs heat stressed cells; n = 6 for each experimental group