FKBP11 and idiopathic pulmonary fibrosis: ER stress-induced apoptosis of alveolar epithelial cells is believed to be a triggering profibrotic event in IPF [83,84,85] and scRNA-Seq data demonstrate—comparatively weak, but detectable-expression of FKBP11 in type I and II alveolar epithelial cells (type I and II pneumocytes).