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chemzky1990金蟲(chóng) (小有名氣)
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[求助]
DNA雙鏈帶的負(fù)電荷比單鏈多嗎?
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做了一個(gè)熒光猝滅檢測(cè)DNA,猝滅劑稱為Q。Q的zeta電勢(shì)為正值,本來(lái)解釋為Q和熒光標(biāo)記的ssDNA靜電吸引,加入配對(duì)DNA之后,形成dsDNA,熒光恢復(fù)(文章里面的解釋: because of the absence of the unpaired nucleobases and the rigid conformation of the formed P1/T1 duplex……)。但審稿人說(shuō)形成dsDNA后應(yīng)該帶更多負(fù)電荷,說(shuō)我的解釋不合理,實(shí)在是沒(méi)搞明白 審稿意見(jiàn):However, when the ssDNA (熒光標(biāo)記的DNA) was hybridized with its complementary strand T1, the dsDNA may show more negative charge. So, here is my question, why dsDNA has weaker interaction with Q from this point. |
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