SFPQ and idiopathic pulmonary fibrosis: Alternatively, in 9 non-cancer tissues, the cytoplasm was negative for SFPQ N-terminal antibody (short SFPQ) (Con: IPF: Cancer = 0.134 + 0.0115:0.17 + 0.024:2.56 + 0.23) (Figure 3B), indicating SFPQ isoforms are located differentially into subcellular compartments.