Fig. 2From: Inducible Nitric Oxide Synthase and Proinflammatory Cytokine Expression by Human Keratinocytes during Acute Urticaria TNF- α and IL-6 expression in pathological skin TNF-α (A) and IL-6 (B) mRNA expression demonstrated by in situ hybridization in lesional skin, in the lower layers of the epidermis; (C) negative (mouse IL-3 probe) and (D) positive control (human β-actin probe) from the same biopsy. Magnification: ×240.Back to article page