The related kinase JNK1 contributes to TGFβ1-induced epithelial to mesenchymal transition and collagen deposition, and has been shown to be necessary for the development of pulmonary fibrosis in a mouse model [19]; however contrary to our findings, this study reports that JNK3 expression is limited to heart, testis, and brain. The gene discussed is MAPK8; the disease is pulmonary fibrosis.