Western blot and qRT‐PCR analysis showed that lnc‐CYB561‐5 knockdown could reduce the expression level of basigin (Bsg), but had no effect on the expressions of delta‐sterol reductase (Lbr) and seizure 6‐like protein 2 (Sez6l2), which have been associated with lung cancer as previously reported (Figure 5B–D, Figure S3). The gene discussed is SEZ6L2; the disease is lung cancer.