LK‐2 is a Nrf2‐mutated human lung cancer cell line,16 and TGBC24TKB is a Keap1‐deficient human gallbladder cancer cell line.19 The expression of Keap1/Nrf2 pathway downstream target genes in Keap1‐ or Nrf2‐mutated cancer cells treated with K‐563 were measured by real‐time RT‐PCR. The gene discussed is KEAP1; the disease is cancer.