Over-expression英'əʊvərɪkspr'eʃn美'əʊvərɪkspr'eʃnCOCA³¹⁵¹¹¹⁺⁴BNC⁸²⁵³⁰⁺¹⁰ 基本例句 过量表达 It is very important to produce the active CTX in vitro by gene over-expression because of the limitation of isolating CTX from snake. 目前通过捕蛇或养蛇提取蛇毒存在局限性，所以采用基因工程生产高纯度的蛇毒蛋白成为当前及今后的研究方向。 kns50.chkd.cnki.net