When we compared these bands in S/T-phosphorylation, we figured out the phosphorylation state was markedly increased in the KRT19 in NCI-H2170 cells compared to that in PC-9 cells, suggesting that phosphorylation modification might play a role in membrane transport of the KRT19 in HER2-overexpressing lung cancers (Supplementary Fig. S2). The gene discussed is ERBB2; the disease is lung cancer.