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Nrf2 is a key transcription factor, which induces a cytoprotective gene array. Nrf2 is regulated at the posttranslational level through proteasomal degradation through an interaction with the adapter protein Keap1. High levels of Nrf2, resulting from a loss of function mutation in Keap1, were reported in chemoresistant non-small cell lung cancer. We observed very low levels of Nrf2 and of Nrf2-regulated...