A note on the free amino acid content of rat brain

Abstract
The free amino-nitroge content of rat brain falls by about 2.6 mg/100 g tissue in thiopentone ("Pentothal") anaesthesia. This is attributable mainly to a fall in the glutamic acid level. Nine amino compounds visible on paper chromatograms were estimated in deproteinized extracts of rat brain which were frozen in liquid O2 immediately after death.