presqualene diphosphate <=> 15-cis-4,4'-diapophytoene + diphosphate
presqualene diphosphate <=> 15-cis-4,4'-diapophytoene + diphosphate
presqualene diphosphate <=> 15-cis-4,4'-diapophytoene + diphosphate
presqualene diphosphate <=> 15-cis-4,4'-diapophytoene + diphosphate