Re: [討論] 基因在DNA的哪一股??
※ 引述《kulaji (沒看過離合器ㄚ?)》之銘言:
: 如題
: 如果基因的判斷是以其產物的功能性來講的話
: DNA有兩股 轉錄出來的東西就是會不一樣
: 那一般來說的基因會是在哪一股@@?
: 又怎知道是在那股?
: 正反股又是怎樣判斷出來的?
: = =問這問題會很笨嗎?
: 希望能有前輩指點迷津@@。。。
這個問題從開頭就有問題
基因不是從產物的功能性去決定的
開始是用蛋白質序列去反推DNA序列
這個歷史太長了請自己查分生課本
一個基因的DNA就是有兩個strand
並沒有分說再哪一個strand上的才是基因
轉錄出來的東西沒有不一樣,事實上真正會轉成RNA的只有一股
一邊叫coding strand(+)另一邊是template strand(-)
因此轉錄成RNA的時候實際上也就適用template strand去做
而要分別其實很簡單
coding strand的序列和你的RNA是一樣的
另一股就是template strand
這個東西分生課本上就有了吧!
我想你應該要回去好好複習一下分生了
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