A review about current progress in understanding biochemical processes of starch synthesis in developing cereal endosperms , with an emphasis on the molecular biology aspect of key enzymes involved in the processes 综述了禾谷类作物胚乳淀粉合成生化过程的近期研究进展，对淀粉合成关键酶的生理和分子生物学研究现状做了重点介绍。
Newswise ? researchers at uab ( uniersity of alabama at birmingham ) hae new information on the structure of a key enzyme in bacteria that could lead to improed antibiotics and less antibiotic resistance 科技信息? ?伯明翰阿拉巴马（ uab ）大学研究人员发现了有关某种细菌关键酶结构的新资料，这将有助于改善抗菌素并减少抗生素耐药性。
Flavonoid - 3 ' , 5 ' - hydroxylase ( f3 ' , 5 ' h ) corresponding to the genetic loci hfl and hf2 , a member of the cytochrome p450 family , is the key enzyme in the anthocyanin biosynthesis , which is generally required for blue or purple flowers 本研究以紫蓝色矮牵牛基因组dna为模板，利用pcr技术获得了两个扩增产物，分别将其克隆至pgem - teasyvector上，进行了全序列分析。
This thesis focused on the study of pha synthase gene ( phac ) , which is a key enzyme for pha production . the purpose of the thesis is to discover and produce novel pha through studies on different phac genes with special functions 本文对pha合成过程中的关键酶- - pha合酶基因( phac )进行了研究，旨在通过发现一些具有特殊功能的pha合酶基因，促进新型pha的发现。
As we know tpk is the important key enzyme in cell growth and metabolism . so what we have done is of great significance to study further the biological functions of the new cloned protein related to bsp proteins 我们从大鼠子宫中通过deae 52离子交换柱等纯化得到tpk样品，收集有活性部分，一切操作在4t中进行，然后观察通过基因工程得到的hbrp对tpk活性的影响。
Research on tyrosinase , the key enzyme causing melanin formation , indicates that arbutin can effectively prohibite melanin formation by cubing on the activity of tyrosinase in non - cell body without affecting cell proliferation 在体外试验的非细胞体、对黑色素产生的关键酶酪氨酸酶的研究表明，熊果苷在不影响细胞增殖的浓度可以抑制黑色素的形成和使酪氨酸酶的活性降低。
The paper systematically discusses the mechanism for glycinebetaine to improve plant salt resistance and its research advances in genetic engineering at home and abroad as well as summarizing the research progresses about the key enzymes and their genetic engineering in glycinebetaine biosynthesis 摘要系统地讨论了甜菜碱在提高植物抗盐性中的作用机理及其国内外研究进展，并对甜菜碱生物合成过程中关键酶及其遗传工程的研究进展进行了综述。
The microorganism which produce ethanol from lignocellulose must be able to dissimilate both five - carbon and six - carbon sugars and consist of the pdc and adh ii which are key enzymes in ethanol formation . regretfully , no naturally occurring organism can efficiently1 produce ethanol from all monosaccharides 要从木质纤维素生成乙醇，所利用的微生物必须能同化所有的戊糖、已糖成分，而且含有生成乙醇的关键酶：丙酮酸脱羧酶( pdc )和乙醇脱氢酶( adh ) 。
Many legume plants may produce the beneficial isoflavones , which are vital to the formation of nitrogen - fixing root - nodules and the disease resistance response of plants . white clover ( trifolium repens ) , a high quality legume forage , however , has little isoflavones . to improve the isoflavone contents of such forage , an available strategy is to introduce gene ( s ) encoding the key enzyme ( s ) in the biosynthesis pathway of insoflavones 许多豆科植物中都含有异黄酮类化合物，异黄酮对植物根瘤的形成和植物的防御反应至关重要，但是在牧草白三叶中缺乏这种有益的化合物，因此通过转基因实验将异黄酮合成酶基因导入白三叶中，提高其异黄酮的含量，增加白三叶的营养价值。
The alga regulates its inside turgor to adapt the outside osmotic change by synthesizing a large amount of glycerol . it is important to study glycerol - 3 - phosphate dehydrogenase , the key enzyme of the glycerol metabolism to know how the species can sustain the hyperosmotics press by accumulating so much glycerol 该藻通过甘油进行细胞膨压的调节，因此对甘油合成途径上的关键酶3 -磷酸甘油脱氢酶( glycerol - 3 - phosphatedehydrogenase ，简称为gpdh )的研究是至关重要的。
