KEAP1 in the BCR E3 ubiquitin ligase complex complex regulates cellular responses to oxidative stress by ubiquitinating NFE2L2/NRF2. As an oxidative stress sensor, KEAP1 normally promotes NFE2L2/NRF2 degradation. KEAP1 Protein, Mouse (His, SUMO) is the recombinant human-derived KEAP1 protein, expressed by E. coli , with N-6*His, N-SUMO.