The Amount of Metabolizable Glycine

Abstract

Two roosters of Singles Comb White Leghorn breed were fed on a formula feed containing 2-¹⁴C glycine for 16_??_17 days. The animals were killed and the specific activities of glycine in the tissue proteins and the purine ring of the excreted uric acid were measured. The amount of synthesized glycine in the rooster was calculated by the dilution method based on the specific activities of glycine in the liver protein and the absorbed one. The rooster absorbed about 1g of glycine and synthesized about 10g of glycine per day. Quantitative aspect of glycine metabolism in the rooster was discussed.