. "\"Catalysis of the reaction: all-trans-pentaprenyl diphosphate + isopentenyl diphosphate = all-trans-hexaprenyl diphosphate + diphosphate.\" [RHEA:22635]" . . "trans-pentaprenyltranstransferase activity" . "all-trans-hexaprenyl-diphosphate synthase activity" . "all-trans-pentaprenyl-diphosphate:isopentenyl-diphosphate pentaprenyltranstransferase activity" . "hexaprenyl diphosphate synthase activity" . "hexaprenyl pyrophosphate synthetase activity" . "EC:2.5.1.-" . "KEGG:R05613" . "RHEA:22635" . "This term represents a deleted EC activity and is scheduled for obsoletion." . .