24小时热门版块排行榜    

查看: 1081  |  回复: 3

Yvaine830

新虫 (初入文坛)

[求助] 使用氯化苄法提取DNA的若干问题

求助,我想用氯化苄法提取真菌里的dna,但是提到加异丙醇产生絮状沉淀这一步时我个人觉得没有沉淀产生,
1.请问絮状沉淀是什么颜色的?是肉眼可见的吗?我做的就是分了层,下层是像油一样的介质,但没有看到沉淀,请问这是不是压根就没提出来呢?因为电泳检测也没有。
2.我们最后加的是提细菌dna试剂盒里的C6试剂,是不是只能加TE啊
谢谢大家

发自小木虫IOS客户端
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

反应链

新虫 (正式写手)

Why not using the CTAB Method?

3% CTAB DNA extraction protocol http://www.zoology.ubc.ca/~riese ... n-protocol-v1.2.pdf
2楼2016-01-07 12:01:55
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

Yvaine830

新虫 (初入文坛)

引用回帖:
2楼: Originally posted by 反应链 at 2016-01-07 12:01:55
Why not using the CTAB Method?

3% CTAB DNA extraction protocol http://www.zoology.ubc.ca/~rieseberg/RiesebergResources/wp-content/uploads/2013/03/Sunflower-CTAB-DNA-extraction-protocol-v1.2.pdf...

老师要求我们用这种方法 我就想问问为什么会这样 感觉是提出dna了 因为把那个油状物加到琼脂糖里它会亮 就是不溶于染料 也不往下跑

发自小木虫IOS客户端
3楼2016-01-08 14:00:48
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

反应链

新虫 (正式写手)

引用回帖:
3楼: Originally posted by Yvaine830 at 2016-01-08 14:00:48
老师要求我们用这种方法 我就想问问为什么会这样 感觉是提出dna了 因为把那个油状物加到琼脂糖里它会亮 就是不溶于染料 也不往下跑
...

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.
4楼2016-01-08 15:14:02
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 Yvaine830 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 工科0856求调剂 +5 沐析汀汀 2026-03-21 5/250 2026-03-23 17:56 by 海瑟薇-
[考研] 接收2026硕士调剂(学硕+专硕) +4 allen-yin 2026-03-23 6/300 2026-03-23 15:04 by 汪!?!
[考研] 276求调剂。有半年电池和半年高分子实习经历 +8 材料学257求调剂 2026-03-23 9/450 2026-03-23 13:01 by ztnimte
[考研] 一志愿北京化工大学 070300 学硕 336分 求调剂 +5 vv迷 2026-03-22 5/250 2026-03-23 07:36 by Iveryant
[考研] 323求调剂 +6 洼小桶 2026-03-18 6/300 2026-03-23 00:29 by king123!
[考研] 求调剂一志愿海大,0703化学学硕304分,有大创项目,四级已过 +6 幸运哩哩 2026-03-22 10/500 2026-03-22 20:10 by edmund7
[考研] 289材料与化工(085600)B区求调剂 +3 这么名字咋样 2026-03-22 4/200 2026-03-22 17:56 by 云民大李老师
[考研] 一志愿华中科技大学071000,求调剂 +4 沿岸有贝壳6 2026-03-21 4/200 2026-03-22 07:21 by ilovexiaobin
[考研] 材料学硕301分求调剂 +7 Liyouyumairs 2026-03-21 7/350 2026-03-21 22:31 by peike
[考研] 0805 316求调剂 +3 大雪深藏 2026-03-18 3/150 2026-03-21 18:55 by 学员8dgXkO
[考研] 0703化学297求调剂 +3 Daisy☆ 2026-03-20 3/150 2026-03-21 17:45 by ColorlessPI
[考研] 336求调剂 +5 rmc8866 2026-03-21 5/250 2026-03-21 17:24 by 学员8dgXkO
[考研] 一志愿重庆大学085700资源与环境总分308求调剂 +7 墨墨漠 2026-03-20 7/350 2026-03-21 16:36 by barlinike
[考研] 268求调剂 +9 简单点0 2026-03-17 9/450 2026-03-21 15:37 by lature00
[考研] 303求调剂 +5 睿08 2026-03-17 7/350 2026-03-21 03:11 by JourneyLucky
[考研] 083200学硕321分一志愿暨南大学求调剂 +3 innocenceF 2026-03-17 3/150 2026-03-21 02:35 by JourneyLucky
[考研] 332求调剂 +4 ydfyh 2026-03-17 4/200 2026-03-21 02:20 by JourneyLucky
[考研] 求调剂 +3 Ma_xt 2026-03-17 3/150 2026-03-21 02:05 by JourneyLucky
[考研] 329求调剂 +9 想上学吖吖 2026-03-19 9/450 2026-03-20 22:01 by luoyongfeng
[考研] 0703化学调剂 +3 妮妮ninicgb 2026-03-17 3/150 2026-03-18 10:29 by macy2011
信息提示
请填处理意见