polyprenyl diphosphate synthase complex heterotetrameric polyprenyl diphosphate synthase complex https://github.com/geneontology/go-ontology/issues/26833 A heterotetrameric complex located in the mitochondrial inner membrane that possesses polyprenyl diphosphate synthase activity involved in the synthesis of the isoprenoid chain of ubiquinone whose length varies between organisms. In S. pombe it is a heterotetramer of Dlp1 and Dps1. GO:0032478 heterotetrameric decaprenyl diphosphate synthase complex cellular_component inner mitochondrial membrane protein complex