Polyketide SynthasesPolyketidesMacrolidesStreptomycesBiosynthetic PathwaysActinobacteriaSaccharopolysporaAnthraquinonesGibberellaPyronesMultienzyme ComplexesChaetomiumOxytetracyclinePeperomiaZearalenonePlakortisMolecular StructureCyclizationBryozoaPeptide Biosynthesis, Nucleic Acid-IndependentLactonesBiological ProductsMultigene FamilyNaphthacenesGenetic Engineering