Fig. 2: The expression of NRF2 in the noncancerous mucosae, primary tumors, and metastatic lymph nodes.

A IHC staining for NRF2 in the noncancerous mucosae; (B) The difference of NRF2 positivity between tumors and noncancerous mucosae; (C) Representative IHC staining for NRF2/NQO1 in primary tumors and matched metastatic lymph nodes collected from two patients. P50: patient 50; P97: patient 97.