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Yvaine830新蟲 (初入文壇)
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[求助]
使用氯化芐法提取DNA的若干問題
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求助,我想用氯化芐法提取真菌里的dna,但是提到加異丙醇產(chǎn)生絮狀沉淀這一步時(shí)我個(gè)人覺得沒有沉淀產(chǎn)生, 1.請問絮狀沉淀是什么顏色的?是肉眼可見的嗎?我做的就是分了層,下層是像油一樣的介質(zhì),但沒有看到沉淀,請問這是不是壓根就沒提出來呢?因?yàn)殡娪緳z測也沒有。 2.我們最后加的是提細(xì)菌dna試劑盒里的C6試劑,是不是只能加TE啊 謝謝大家 發(fā)自小木蟲IOS客戶端 |
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Why not using the CTAB Method? 3% CTAB DNA extraction protocol http://www.zoology.ubc.ca/~riese ... n-protocol-v1.2.pdf |
新蟲 (初入文壇)
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老師要求我們用這種方法 我就想問問為什么會(huì)這樣 感覺是提出dna了 因?yàn)榘涯莻(gè)油狀物加到瓊脂糖里它會(huì)亮 就是不溶于染料 也不往下跑 發(fā)自小木蟲IOS客戶端 |
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Your DNA samples are rich in sticky compounds. You should wash the homogenate with CTAB-free buffer for three or four times, until the supernatant is not viscous. Please refer to this article "Zeng J, Zou Y P, Bai J Y, et al. Preparation of total DNA from ‘recalcitrant plant taxa’[J]. Acta Botanica Sinica, 2002, 44(6): 694-697." "The DNA is in a tight tangle with polysaccharides. This tangle of DNA and polysaccharides is very difficult to separte, which has make them too sticking to be dissolved in water or TE, and it is not even possible to load such DNA samples into the electrophoresis well. " Therefore, your protocol is not suitable for the plant total DNA extraction. Give you a advise, use the 3% CTAB DNA extraction protocol instead. |
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