oxidoreductase activity, acting on the CH-CH group of donors, quinone or related compound as acceptor protoporphyrinogen oxidase activity protoporphyrinogen oxidase activity, quinone as acceptor https://github.com/geneontology/go-ontology/issues/24056 https://github.com/geneontology/go-ontology/issues/28520 https://github.com/geneontology/go-ontology/issues/31965 menaquinone-dependent protoporphyrinogen oxidase activity protoporphyrinogen-IX:menaquinone oxidoreductase activity molecular_function RHEA:65032 EC:1.3.5.3 mah RHEA:27409 Catalysis of the reaction: protoporphyrinogen IX + 3 a quinone = protoporphyrin IX + 3 a quinol. RHEA:63936 2009-07-20T02:46:06Z quinone-dependent protoporphyrinogen oxidase activity GO:0070819