Tryptophan Metabolism in Rice Moth Larva (Corcyra Cephalonica St.)

Summary

1. The technique of circular paper chromatography has been adapted to the resolution of the various tryptophan metabolites. 2. Kynurenine and 3-hydroxy-kynurenine have been shown to constitute the yellow pigment excreted by rice moth larva on a tryptophan-rich pyridoxine-deficient diet. The absence of xanthurenic acid in the excretory pigment has also been demonstrated.