text:  KN-smoke-high-5 month+1d-R2 Lung tissue of Nrf2 knock-out mouse, smoke treated tissue: lung tissue; genotype: CD-1_Nrf2 -/-; age: 13 weeks + 5 month + 1 day; treatment: 2R4F whole mainstream smoke 750 µg/ml, treatment over 5 month + 1 day recovery, 4x1h exposure per day