Since among all NSCLC cell lines, the expression of FKBP4 in PC-9 cells is the lowest and the expression of FKBP4 is the highest in A549 cells, we transfected the FKBP4 expression plasmid in PC-9 and FKBP4 shRNA in A549 cells. Here, FKBP4 is linked to non-small cell lung carcinoma.