“…A new sensitive enzyme microelectrode was developed for D-ser recently using DAAO [28] (1) unknown (mislabeled by authors), (2) arginine, (3) hydrolysis products, (4) lysine, (5) phenylalanine, (6) leucine, isoleucine, and tyrosine, (7) GABA, (8) valine, (9) citrulline, (10) a-ABA, methionine, R-ABA, and b-alanine, (11) histidine, (12) taurine, (13) alanine and glutamine, (14) threonine, (15) glycine, (16) asparagine, (17) L-serine, (18) D-serine, (19) phosphoethanolamine, (20) internal standard, and (21) glutamate. (Adapted from ref.…”