斑步雜交(dot hybridization)
關(guān)鍵詞: 斑步雜交來(lái)源: 互聯(lián)網(wǎng)
斑步雜交(dot hybridization)是道先將被測(cè)的DNA或RNA變性后固定在濾膜上然后加入過(guò)量的標(biāo)記好的DNA或RNA探針進(jìn)行雜交。該法的特點(diǎn)是操作簡(jiǎn)單,事先不用限制性?xún)?nèi)切酶消化或凝膠電永分離核酸樣品,可在同一張膜上同時(shí)進(jìn)行多個(gè)樣品的檢測(cè);根據(jù)斑點(diǎn)雜并的結(jié)果,可以推算出雜交陽(yáng)性的拷貝數(shù)。該法的缺點(diǎn)是不能鑒定所測(cè)基因的相對(duì)分子質(zhì)量,而且特異性較差,有一定比例的假陽(yáng)性。
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