FKBP9 and glioblastoma: We stably introduced wild-type (WT)-FKBP9 or the FKBP9-M541I variant into SF-539, T98G and U-87 MG GBM cells (designated SF-539-FKBP9-WT, SF-539-FKBP9-M541I, T98G-FKBP9-WT, T98G-FKBP9-M541I, U-87 MG-FKBP9-WT and U-87 MG-FKBP9-M541I respectively) and confirmed expression of the constructs by IB (Fig. 4a).