title: Valine as a precursor of n-butyrate unit in the biosynthesis of macrolide aglycone.
mesh_terms: D007933:Leucomycins / Q000096:biosynthesis*; D013306:Streptomycetaceae / Q000378:metabolism*; D015645:Tylosin / Q000031:analogs & derivatives*; D014633:Valine / Q000378:metabolism*
chemical_list: D007933:Leucomycins; C027411:protylonolide; D014633:Valine; D015645:Tylosin