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uroporphyrinI synthetase 尿卟啉Ⅰ合成酶
This complex reaction is catalyzed by anthranilate synthetase. 这个复合反应是被邻氨基苯甲酸合成酶催化的。
Objectives:To clone and express the S-adenosyl-L-methionine synthetase gene. 目的:克隆与表达大肠杆菌S-腺苷甲硫氨酸合成酶的基因。
The extraction and purification of S-adenosylmethionine synthetase from yeast were investigated in this paper. 方法:研究了腺苷甲硫氨酸合成酶的提取和纯化。
Abstract: Glutamine synthetase(GS)is the key enzyme in the assimilation of ammonium in higer plants. 摘要：谷氨酰胺合成酶（GS）是参与高等植物氮同化过程的关键酶。
Objective To explore the effect of sildenafil on NO and NO synthetase (NOS) after physical exercise at high altitude. 摘要目的探讨西地那非对高原人体运动一氧化氮(NO)及其合酶(NOS)的影响。
Aim:To research the activity and significance of Nitric Oxide Synthetase (NOS) in the patients with viral hepatitis. 目的:探讨NOS在病毒性肝炎患者肝组织中的活性及意义。
The activity of glutamine synthetase gradually increased and then declined as a single-peak curve with the process of grain filling. 结果表明,水稻灌浆过程中籽粒谷氨酰胺合成酶活性随灌浆进程逐渐增加,达到峰值后又逐渐下降,呈单峰曲线变化;
Leucyl-tRNA synthetase (LeuRS)can link not only the cognate leucine but also the nearly cognate isoleucine andmethionine to tRNA~(Leu). 亮氨酰-tRNA合成酶不仅可以把共轭的亮氨酸而且可以把相近的异亮氨酸和蛋氨酸共价连接到tRNA~(Leu)。
Indica rice had higher nitrate reductase activity (NRA) and glutamine synthetase activity (GSA) than Japonica rice in 1 mmol. 其中，扬稻6号生长最优，农垦57最差，扬稻总氮含量显著高于农垦，说明扬稻对硝态氮的吸收利用效率高于农垦。籼稻体内的NRA显著高于粳稻，说明籼稻对硝态氮的同化能力优于粳稻。
Studies of the enzyme CTP synthetase in the parasite Trypanosoma brucei have brought researchers closer to a cure for African sleeping sickness. 对于寄生虫布氏锥虫CTP合成酶的研究使研究者离成功治愈非洲嗜睡病又近了一步。
The crystal structures of the editing domain of E.coli leucyl-tRNA synthetase and its complexes with methionine and isoleucine. [15]刘云清.;大肠杆菌亮氨酰-tRNA合成酶编校结构域和其与蛋氨酸和异亮氨酸复合物晶体结构的研究
Glutamine Synthetase (GS) activity in leaves increases with increasing nitrogen level, but in roots, GS activity drops rapidly at high nitrogen levels. 叶片谷氨酰胺合成酶(GS)活性随氮素营养的增加而提高，根系GS活性在氮素水平过高时反而下降。
The cob nitrate reductive activity and glutamine synthetase activity of No.139 were higher than the contrast,and emergenced the growth maximum. 其雌穗轴的硝酸还原酶活性和谷氨酰胺合成酶活性均高于对照,且有生长高峰出现。
The results showed that the fluorine with a low dose could enhance the activity of the synthetase, while the high dose hindered it. 高浓度氟破坏了两膜的结构，使跨膜被动迁移增大。
Objective:To explore the expression and alteration mechanism of nitric oxide synthetase (NOS) in tissues of lung cancer. 目的：探讨一氧化氮合酶(NOS)在肺癌组织中的表达与作用机制。
The PRPP synthetase activity in BFU Es and CFU Es from bone marrows of mice was estimated by ion pair reversed phase HPLC (IPrHPLC),using isocratic elution. 采用离子对反相高效液相色谱法 ( IPr HPLC)的单液等度洗脱 ;测定了小鼠骨髓红系爆增性集落形成单位 ( BFU- Es)与红系集落形成单位 ( CFU- Es)的 PRPP合成酶活性 .
The activities of nitrate reductase (NR), glufamine synthetase(GS), and protease in functional leaves of rice and glutamine synthetase in grain of rice were strengthened. 可增强水稻功能叶的硝酸还原酶、谷氨酰胺合成酶和蛋白水解酶活性及籽粒的谷氨酰胺合成酶活性；
Objective To explore the relationship between serum nitric oxide (NO), nitric oxide synthetase (NOS) levels and endotoxin contents in patients with chronic hepatitis C. 目的:探讨了慢性丙型肝炎患者血清一氧化氮(NO)、一氧化氮酶(NOS)的含量变化及其与内毒素的关系。
Characteristics of filamentous fungal polyketide synthetase and isolation and identification of their gene coding as well as their pathway engineering were reviewed. 综述了丝状真菌聚酮体合成酶的特性及其编码基因的分离、鉴定和途径工程。