1.14.15.34	Production of hybrid 16-membered macrolides by expressing combinations of polyketide synthase genes in engineered Streptomyces fradiae hosts	Streptomyces fradiae	
1.14.15.34	Properties of Streptomyces fradiae mutants blocked in biosynthesis of the macrolide antibiotic tylosin	Streptomyces fradiae