Abstract
Abstract Dansylated glutamic acid, glutamine and γ-amino butyric acid (GABA) show maximum absorption at 221 nm. Using this wavelength, the detection limits for dansylated amino acids studied by reversed-phase HPLC are similar to those reported by fluorescence. This technique was used to look foe the presence of glutamic acid and its metabolites in human serum. Glutamic acid and glutamine were present in significant amounts and their levels were 2.5 and 6.1 nmoles/ml respetively, while GABA was present in trace amounts, less than 0.3 nmoles/ml.
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