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基因缺失活疫苗
释义
基因缺失活疫苗
Encyclopedia
理学
基因工程
释
gene deleted live vaccine
基因缺失活疫苗
用基因工程技术将病原体中与毒力相关的基因删除或突变,使之毒力减弱甚至消失,但仍然保留其抗原性及一定的复制和感染能力,从而能够自然感染宿主细胞并产生免疫反应的疫苗。
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up-to-standard evaluation of water function zone
upturned roof-ridge
UPU
upward
upward bias
upward causality
upward compatibility
upward concave
upward continuation
upward convex
upward cumulation
upward cut and fill stoping method
upward deviation
upward directed set
upward/downward atmospheric radiation
upward firing
upward induction
upward invasion of liver qi
upward lighting
upward-looking bowl sundial
upward social comparison
upward transition
upwash
upwelling
up welling current
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