2.6.99.3 Biosynthesis of secondary metabolites - 01110 2.6.99.3 Biosynthesis of various secondary metabolites - part 3 - 00997 2.6.99.3 D-cycloserine biosynthesis - - 2.6.99.3 D-cycloserine biosynthesis D-cycloserine biosynthesis - 2.6.99.3 Metabolic pathways - 01100