有些基因表达极易受环境变化影响，在特定环境信号刺激下，有些基因的表达方面为开放或增强，这种表达方式称为诱导表达。
金属硫蛋白启动子是最常用的诱导型表达启动子之一，经过重金属诱导，其表达强度可以增加100倍。
MT promoter is one of the common inducible promoters which can enhance expression of gene 100 times after being induced by weight metals.
诱导型一氧化氮合酶的诱导表达往往导致心肌的收缩功能下降。
The up regulation of inducible nitric oxide synthase ( iN OS ) often negatively modulates myocardial function.
目的：探讨在热休克条件下，人胚肺二倍体细胞MRC-5株诱导型热休克蛋白70（HSP70）在细胞水平的表达机制，以及对MRC-5细胞衰老的影响。
Objective: To explore the expressive mechanism of induced HSP70 and it' s effect on the senescence of MRC-5 cell in the heat shock condition.
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