Abstract
One hr following an infusion of 3H-L-tryptophan, the lateral hypothalamus was perfused with physiological bacteriostatic saline for 40 min. Samples of perfusate, which corresponded to 75–90 min post-infusion, were analyzed by thin layer chromatography for estimation of 3H-labelled L-tryptophan, 5-hydroxytryptophan and 5-hydroxytryptamine. The results indicate that tryptophan uptake and serotonin synthesis are enhanced as a function of hours of food deprivation.
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