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. 2022 Apr 20;30(4):1431–1443. doi: 10.1007/s10787-022-00967-3

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Fig. 2 — Expression of Nrf2 and Keap-1 in the bronchial epithelium of NS, S and COPD patients. Protein expression of Nrf2 and Keap-1 was examined by immunohistochemistry in lung tissue from NS (n = 9), S (n = 12) and COPD (n = 8). Data presented as positive cells per mm of epithelium for Nrf2 (A) and Keap-1 (B). Data represented as positive cells intensity of epithelium for Nrf2 (C) and Keap-1 (D). Data represent individual patients with mean