A: Normal skin: light HSP70 immuno-staining in basal epidermal cell layer with negative immune-reactivity in supra-basal and superficial epidermal layers (immunoperoxidase X200),

B: Psoriasis vulgaris: intense HSP70 immuno-staining in basal and supra-basal epidermal cell layers with light superficial layer immuno-staining and dermal inflammatory infiltrate immune reactivity (immunoperoxidase X200). [44], [Courtesy: Amina Gamal el Din et al].