Component of the peroxisomal translocation machinery with PEX13 and PEX17. Interacts with both the PTS1 and PTS2 receptors. Binds PEX3, PEX5, PEX7, PEX8, SH3 domain of PEX13, PEX17 and itself. Phosphorylated on serine or threonine residues. Belongs to the peroxin-14 family.