Interestingly, all these six dominant isoforms were found to be present only in structural cells like fibroblasts (PLA2G2A and PLA2G5), mesothelial cells (PLA2G2A) and epithelial cells (PLA2G1B, PLA2G3, PLA2G10 and PLA2G12A) that are key players in lung fibrosis. This evidence concerns the gene PLA2G1B and pulmonary fibrosis.