this is demonstrated by treatment of proteolytically derived aspartic acid beta- [ 3h ] methyl ester with l- and d-amino-acid oxidases and by the resolution of diastereomeric l-leucyl dipeptides containing either l- or d-aspartic acid beta-methyl ester by ion-exchange chromatography .
C0004015
aspartic acid
C0949752
aspartic acid beta