谷氨酰胺合成酶，是衡量植物氮素同化水平的一项重要生理指标。
将此突变种固定化在聚氨脂泡沫中后，定量测定其谷氨酰胺合成酶(GS)活性。
After immobilized, the cells of the mutant within polyurethane (PU) foams, glutamine synthesize (GS) and NH4 + secretory activity of GS, and its growth and photosynthesis were measured.
该谷氨酰胺合成酶是自氨基端第405位氨基酸残基突变为苯丙氨酸的谷氨酸棒杆菌的谷氨酰胺合成酶。
The said glutamine synthetase is prepared by abrupt change of the 405th amino acid residue of amino end to phenylalanine corynebacterium glutamicum .
以前的研究表明，高等植物叶绿体谷氨酰胺合成酶（GS2 ）受光调节，但叶片胞液GS（GS1 ）和非光合作用组织中的GS很少受光的影响。
The previous studies showed that the expression of chloroplast GS2 is mediated by light but cytosolic GS1 and GS in non photosynthetic tissues of higher plants are little influenced.
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