Involved in PTS1- and PTS2-dependent protein import into peroxisomes (PubMed:16813573, PubMed:17478547). Required for PTS1-dependent protein import into pollen peroxisomes (PubMed:18160292). Acts as a docking factor on peroxisomal membranes (PubMed:16813573). Required for the proper targeting of PEX7 to the peroxisome (PubMed:19594707). Required for the export/release of receptors on the peroxisome membrane (PubMed:19594707). Essential for pollen-tube discharge that take place only in the presence of functional peroxisomes in either the male or the female gametophyte (PubMed:18160292). Interacts (via N-terminus) with PEX7, but not with PEX5 or PEX14 (PubMed:16813573). Interacts with APEM9 (via N-terminus) (PubMed:24510720). Highly expressed in pollen. Detected in shoots, roots, stems, leaves, inflorescences and emasculated postils. Strongly expressed in both male and female gametophytes during fertilization. Lethal, when homozygous. Belongs to the peroxin-13 family.