目前基因工程所用的质粒载体主要是以天然细菌质粒的各种元件为基础重新组建的人工质粒pbr322质粒是较早构建的质粒载体其主要结构如图一所示 Template




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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


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tomski目前基因工程所用的质粒载体主要是以天然细菌质粒的各种元件为基础重新组建的人工质粒pbr322质粒是较早构建的质粒载体其主要结构如图一所示 coloring