KDELR3 and neoplasm: Western blot test manifested that the protein expressions of KDELR3 in xenograft tumours from the KDELR3 deletion group (sh‐KDELR3, S1‐S6) were significantly lower than that in the negative control group (sh‐vector, C1‐C6) (Figure 13C), which ensured the accuracy of the experiments.