May be involved in peroxisomal proliferation and may regulate peroxisomes division (PubMed:9792670). May mediate binding of coatomer proteins to the peroxisomal membrane (By similarity). Promotes membrane protrusion and elongation on the peroxisomal surface (PubMed:20826455). Homodimer (PubMed:20826455). Heterodimer with PEX11G (PubMed:20826455). Probably interacts with COPB2 and COPA (By similarity). Interacts with PEX19 (PubMed:10704444). Interacts with FIS1 (PubMed:20826455). Seems not to be N-glycosylated. Belongs to the peroxin-11 family.