Compared with cells transfected with miR-19a/b mimic and control vector, the cells transfected with both miR-19a/b mimic and MTUS1 vector exhibited a significantly lower proliferation rate (Fig. S3A), suggesting that miR-19a/b-resistant MTUS1 can attenuate the proliferative effect of miR-19a/b on lung cancer cells. Here, MTUS1 is linked to lung cancer.