Methods A regulatory secretion system was devised by placing proinsulin cDNA, containing genetically engineered furin endoprotease cleavage sites, under the regulatable promoter for PEPCK and constructed a retroviral insulin expression vector pN PEPCK mINS.

  • 方法将已经突变的含有蛋白酶furin酶切位点的胰岛素原cDNA置于PEPCK启动子控制之下,构建表达胰岛素的逆转录病毒载体pN PEPCK mINS。

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