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396101466

金虫 (正式写手)

一段遗失的美好

[交流] 【求助/交流】有关免疫沉淀电泳的的操作 已有5人参与

最近看了一篇文章,做了免疫沉淀分析,并作了电泳,但是不清楚电泳中的的成分是沉淀还是上清,想问各位高人,免疫沉淀电泳的具体操作是怎么样的!
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人生的三大悲剧:不知道选择,不坚持选择,不断选择!
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yabxxh

木虫 (正式写手)

你这个太笼统了,说的细一点可能大家能帮得上
2楼2011-03-23 11:05:22
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396101466

金虫 (正式写手)

一段遗失的美好

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silicare(金币+3): 很好,鼓励交流 2011-04-25 18:23:23
引用回帖:
Originally posted by yabxxh at 2011-03-23 11:05:22:
你这个太笼统了,说的细一点可能大家能帮得上

我只想解释两个图,图的说明是Fig. 5. Immunoprecipitation using the D1 (A) and A3 (B) Fab fragments and cow's milk samples. The Fab fragments were immobilised on protein L beads and then incubated with themilk samples without orwith heat treatment (0,15, 30 or 60 min at 95°C). After washing steps, the samples were analysed on a 15% SDS-PAGE gel and stained with silver. The boxes indicate the protein bands that were cut out for MS-analysis. Arrows indicate the Fab fragments. Ctr=protein L beads without the immobilized Fab incubated with 0′ (1) and 60′ (2) heated BLG sample. As a control, 1 µg of native BLG (Sigma) and D1/A3 Fab were used.

其操作内容是: Pasteurized, skimmed cow's milk was centrifuged (20 000×g, 2 min, 4 °C) and the supernatant
was diluted 1:4 in PBS and used for immunoprecipitation. In the immunoprecipitation assay, both heat-treated (15, 30,60 min at 95 °C) and native cow's milk samples were used. The BLG-specific Fab fragments D1 and A3 were immobilized onto protein L beads (CBind™L, Fluka) according to the manufacturer's instructions (100-150 µg protein/25 µl beads). Then the milk samples were incubated with protein L-Fab beads for 1 h at room temperature. After the washing step with PBS-0.05% Tween 20, elution was performed by adding first 25 µl and then 50 µl of 0.1 M glycine-HCl (pH 2). The eluted samples were separated on a 15% SDS-PAGE gel
and stained with silver.
我想问的是图中的条带怎么解释呀?谢谢啦!



人生的三大悲剧:不知道选择,不坚持选择,不断选择!
3楼2011-03-23 15:22:59
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350784478

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小木虫(金币+0.5):给个红包,谢谢回帖
有没有免疫沉淀的操作步骤,我最近也要做。在网上也找了很久,但是具体操作也不一样,也不知道谁是对的。
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4楼2011-04-25 17:52:36
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ujsyangyong

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小木虫(金币+0.5):给个红包,谢谢回帖
lstt09nk(金币+2): 感谢参与 2011-04-26 22:02:41
电泳的样品是最后的沉淀用上样缓冲液煮出来的样品,免疫沉淀的原理就是证明两个蛋白的结合,如用A的抗体加入样品中孵育,A就会和抗A抗体结合,再用珠子去结合抗体的Fc段,这样就会形成珠子-抗A-A复合物,沉淀下来,上样缓冲液煮过上样,以抗B抗体进行WesternBlot检测,如能测到条带,则证明AB是结合在一起的
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5楼2011-04-25 22:10:28
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396101466

金虫 (正式写手)

一段遗失的美好

引用回帖:
Originally posted by ujsyangyong at 2011-04-25 22:10:28:
电泳的样品是最后的沉淀用上样缓冲液煮出来的样品,免疫沉淀的原理就是证明两个蛋白的结合,如用A的抗体加入样品中孵育,A就会和抗A抗体结合,再用珠子去结合抗体的Fc段,这样就会形成珠子-抗A-A复合物,沉淀下来 ...

谢谢啦!
人生的三大悲剧:不知道选择,不坚持选择,不断选择!
6楼2011-04-27 19:26:21
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xiayongxiu

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小木虫: 金币+0.5, 给个红包,谢谢回帖
引用回帖:
1014536楼: Originally posted by 396101466 at 2011-03-23 15:22:59
我只想解释两个图,图的说明是Fig. 5. Immunoprecipitation using the D1 (A) and A3 (B) Fab fragments and cow's milk samples. The Fab fragments were immobilised on protein L beads and then incubated wit ...

请问你这是一篇什么文献啊?介意把文献名称发出来大家看看不?
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7楼2013-01-26 21:31:02
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