They are also the key components of insect - baculovirus expression system ( bevs ) , which has been one of the four main expression systems in gene engineering 同时，杆状病毒昆虫细胞表达系统是一类重要的真核表达系统，现已成为目前基因工程四大表达系统之一。
For mass production of egf , bombyx mori baculovirus expression vector system ( bevs ) was adopted in this experiment to express recombinant egf 为大量获得egf ，本研究利用家蚕杆状病毒表达系统，以家蚕作为生物反应器，在家蚕细胞和幼虫中表达人表皮生长因子。
Thinking of the cptl is small and its poor stability , a gst fusion expression system of pgex was used to improve the immunogenicity of cptl 考虑到cpti为小分子多肽，稳定性较差，为增加cpti蛋白的免疫原性，本研究采用了cpti与谷胱甘肽gst融合的pgex表达系统。
However , there is a low expression problem in plant expression system which restrict the application of transgenic plant in medicine gene engineering production 但植物表达系统存在外源基因表达量低的问题，极大地限制了转基因植物在基因工程药物生产上的应用。
Different expression systems were constructed using different expression vector including pet - his and e . coli topi of " and bl21 host cells 利用pet - his等不同表达载体和大肠杆菌top10f 、 bl21 ( de3 ) plyss表达宿主菌，成功构建了胆固醇氧化酶基因的不同原核表达系统。
It includes the proposing of the theory , some relevant fundamental concepts , the reduction of data and attributes , krs , decision analysis , and the reduction of decision rules 包括理论的提出，一些基本的概念，数据的约简，知识表达系统，属性的约简，决策逻辑和决策规则最小化等。
These include the ability to target the gene of interest to site - specific areas of the chloroplast genome , high - level expression of foreign genes and increased environment security 由于植物叶绿体表达系统能够高效表达目的基因、环境安全性高，已成为目前植物生物反应器研究的热点之一。
The use of plants as an expression system for recombinant protein production would be at least as economical as traditional industrial facilities ( by fermentation processes or bioreactor systems ) 利用植物作为重组蛋白生产的表达系统至少比传统的工业制造方法（利用发酵过程和生物反应系统）要便宜。
Although compared with the other insect cell expression systems , the expression system which uses silkworm , bombyx mori , as bioreactor is very meaningful to study for so many merits of it 虽然以家蚕为生物反应器的家蚕杆状病毒表达系统较之其他的昆虫表达系统来说具许多优点，具有重大的研究意义。
Although the thymosin has been successfully expressed in the prokaryotic cell system , its application is restricted because of its deficiency of modification after translation 尽管研究者已在原核细胞表达系统对胸腺肽的表达进行了研究，但由于原核表达系统缺乏翻译后的加工修饰等缺点，限制了其应用。
