氨甲酰磷酸台成氨甲酰Asp N=C-0-P=0+Hc00 H4C-N-0-00 Aspartate transcarbamoylase C00 C00 Carbamoyl phosphate Aspartate N-Carba arbamoylaspartate氨甲酰磷酸合成氨甲酰Asp