Abstract

The presence of 16 or 17 amino acids, amines, ethanolamine phosphoric acid (EPA), and one unknown compound has been demonstrated in the egg of the grasshopper Chortophaga viridifasciata De Geer by means of paper partition chromatography. The role of citrulline in nitrogen elimination in this organism is questionable. EPA may be active in nitrogen elimination. Methionine is the only sulphur amino acid detected. Ethanolamine is metabolically related to serine and glycine. EPA may have the same metabolic relationship to these amino acids as does ethanolamine. The presence of EPA and a high lipid metabolism are probably characteristic of rapidly growing tissues. EPA may be necessary for the maintenance of tissue cultures of the grasshopper embryo.

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