Use bacteria like E. coli to remove pesticides in environment

It's also another News published in Nature. They create a E. coli which can sense the chemical in the environment and move toward the sources. The E. coli was modified to sense pesticides. In the way, they can easily to wipe off those chemicals. But, What i interesting with is that Gallivan said. To use multiple riboswitches, which control the movent of bacteria, would allow E. coli to do some complex tasks.

For example:

First, bacteria would activated by the A item, and grab A item as the activation of first riboswithce. Then, another gene activated(secondery riboswithce) made bacteria move toward B item (bring with A item). In that kide program setting, we can use E. coli to move something(A) to a specific site(B).

這是另外一偏Nature News. 科學家創造了可以感應環境中的藥物(這裡指的是殺蟲劑)的大腸桿菌, 並且使得大腸桿菌會朝向藥物的來源移動. 利用這樣的方式, 就可以使得大腸桿菌移向藥物, 並且清除藥物. 不過這篇真正引起我的興趣的是其中一個作者說的話, 他說利用多個riboswithces, 可以使得大腸桿菌完成複雜的任務.

舉例來說：

細菌會因為第一個riboswithce的活化, 朝向A物移動並且抓物A物. 接著, 第二個riboswithce 活化, 只得細菌帶著A物朝向B物移動.
在這樣的程序設定之下, 我們就可以利用大腸桿菌把物體移到特定的地點.

http://www.nature.com/news/2008/080409/full/news.2008.742.html?s=news_rss