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Chromatograms of OPA derivatives of glutamate and GABA. (A) Standard solution, 10 ug of glutamate (retention time: 1.833 min) and GABA (retention time: 2.478 min) injected onto the column. Conditions as described in the text. (B) Example of a serum sample from a CP group rat showing glutamate (9.8 ug/ml) and GABA (60.4 ug/ml).
