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华支睾吸虫和大平并殖吸虫体内存在嘧啶生物合成的从头合成途径和补救途径。在过量鸟氨酸和鸟氨酸氨甲酰转移酶存在的情况下,以H~(14)CO_3~-作基质,采用Tatibana和Shigesada(1972)描述的方法测定氨基甲酰磷酸合成酶的活力;以Mori等(1975)描述的方法测定天门冬氨酸氨甲酰转移酶和二氢乳清酸酶的活力;以Hoogenraed和Lee
Clonorchis sinensis and Paragonimus parasitoid Pyrimidine biosynthesis in vivo de novo synthesis pathway and remediation pathways. In the presence of excess ornithine and carbamyl transcarbamylase, the carbamoyl-phosphate synthetase activity was measured using the H 14 CO 3 3- substrate as described by Tatibana and Shigesada (1972) ; Determination of as Mori method (1975) aspartate carbamoyl transferase and dihydroortant enzyme activity; Hoogenraed and Lee