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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我個人覺得沒有沉淀產(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?因為電泳檢測也沒有。 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 |
新蟲 (初入文壇)
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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 |
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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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