allosteric regulation of Glutamate tivity by feedback inhi- NH+ATP ⊙Glycine 谷氨酰胺合成酶的 Glutamine synthetase Mg2 0 反馈抑制别购调控 ADP+ ○Alanine HaN CH ⊙⊙ ⊙ ⊙ OH H N 8、 Carbamoyl-P Serine CH2一CH NH +NH3 Histidine PIR NH. +NHs AMP--- CH 0 P P-PIR H ---Tryptophan CTP Glucosamine-6-P 谷氨酰胺合成酶的 反馈抑制别购调控