Fig. 3From: Interactions between rat alveolar epithelial cells and bone marrow-derived mesenchymal stem cells: an in vitro co-culture modelThree-dimensional reconstruction of images of primary AECs co-cultured with rat lung fibroblasts. a Separated co-culture on day 21 and b mixed co-culture on day 21. Red staining indicates expression of RAGE, yellow staining indicates ZO-1 expression, and green staining indicates expression of SP-DBack to article page