D-alanine biosynthesis KEGG:map01100 GO:0030632 Biosynthesis of D-alanine. D-alanine is used either as an energy source or as a component of bacterial cell wall, where it is directly involved in the cross-linking of adjacent peptidoglycan chains. In Gram-positive bacteria, D-alanine can also be found to variable extents in cell wall teichoic acid and lipoteichoic acid residues. KEGG:map00473 pathway MetaCyc:ALADEG-PWY D-2-aminopropionic acid biosynthesis UPa:UPA00042 amino-acid biosynthesis nonprotein amino-acid biosynthesis alanine metabolism