[求救] 最近的ligation很難搞...有人有好建議嗎?
最近在接3個construct
不是大片段就是blunt end
接了快3個月了還是接不出來>< (快被老闆逼瘋了...)
又不能換接的方式 (因為前人是這樣接要比較...)
實驗室用的是NEB的T4 ligase 16度C overnight
爬文有看到用4度C處理的會比較好嗎?
不知道版上的先進們有沒有什麼好建議..orz
------------------------------------------------------------------
(1)
1700 bp insert 接 12k vector
insert已先clone好於TA vector上
cutting site設計BamHI+HindIII切下
感覺應該沒什麼困難...但就是接不起來....
------------------------------------------------------------------
(2)
5.4k vector 接 8.4k vector
將2個vector用KpnI一刀切開後互黏成將近14k的plasmid
2個vector抗不同抗生素 因此2種抗生素同時篩選能長的應該就是接成的
但都不長.....
------------------------------------------------------------------
(3)
insert 950 bp 要deletion序列中間片段 7 bp
所以設計primer夾出該片段以外2側的片段(150 & 800 bp)
2片段外端在primer上各別設計BamHI和EcoRI cutting site
(因為PCR後要digestion因此有多設計2bp, NEB說BamHI/EcoRI只要1bp就能切..)
digestion之後2片段與 4.7k vector做 ligation
(有處理PNK讓PCR片段+磷酸根)
想接成vector/EcoRI-----╡(blunt end, deletion的片段)╞-----BamHI/vector
我本來是想中間再設計一個cutting site分2次接
但老闆堅持這樣一定接的起來
而且說這是promoter怕多出cutting site序列影響transcrip
但怎麼樣就是接不出來啊~~~~~~
------------------------------------------------------------------
以上
我想如果要仔細找問題的話會有很多地方要討論會很複雜~"~
所以想先請問看看這樣的一些construct
有沒有一些撇步或特別的方法or該注意的地方呢??
謝謝
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.115.48.144
推
04/28 14:05, , 1F
04/28 14:05, 1F
推
04/28 14:18, , 2F
04/28 14:18, 2F
→
04/28 14:19, , 3F
04/28 14:19, 3F
→
04/28 14:19, , 4F
04/28 14:19, 4F
→
04/28 14:34, , 5F
04/28 14:34, 5F
→
04/28 14:35, , 6F
04/28 14:35, 6F
→
04/28 14:36, , 7F
04/28 14:36, 7F
推
04/28 14:40, , 8F
04/28 14:40, 8F
→
04/28 14:42, , 9F
04/28 14:42, 9F
→
04/28 14:43, , 10F
04/28 14:43, 10F
→
04/28 14:44, , 11F
04/28 14:44, 11F
推
04/28 14:56, , 12F
04/28 14:56, 12F
→
04/28 14:56, , 13F
04/28 14:56, 13F
→
04/28 14:58, , 14F
04/28 14:58, 14F
→
04/28 15:00, , 15F
04/28 15:00, 15F
→
04/28 15:02, , 16F
04/28 15:02, 16F
→
04/28 15:02, , 17F
04/28 15:02, 17F
→
04/28 15:07, , 18F
04/28 15:07, 18F
→
04/28 16:51, , 19F
04/28 16:51, 19F
推
04/28 16:57, , 20F
04/28 16:57, 20F
推
04/28 20:22, , 21F
04/28 20:22, 21F
→
04/28 20:23, , 22F
04/28 20:23, 22F
→
04/28 22:07, , 23F
04/28 22:07, 23F
推
04/28 22:26, , 24F
04/28 22:26, 24F
推
04/29 02:13, , 25F
04/29 02:13, 25F
→
04/29 02:14, , 26F
04/29 02:14, 26F
→
04/29 02:15, , 27F
04/29 02:15, 27F
→
04/29 02:16, , 28F
04/29 02:16, 28F
有試過轉空的12k vector ok
然後需要PNK是爬文說PCR完沒有磷 0.0
推
04/29 02:19, , 29F
04/29 02:19, 29F
→
04/29 02:20, , 30F
04/29 02:20, 30F
→
04/29 02:23, , 31F
04/29 02:23, 31F
→
04/29 02:23, , 32F
04/29 02:23, 32F
目前是SOC recover 1 hr
接不起來是要嘛不長 要嘛就只有空vector
ligation後跑膠嗎?! 這我沒試過耶...
因為以前學長是說跑膠也只能看到insert vector的band
接成功的plasmid量太少看不到...
推
04/29 09:34, , 33F
04/29 09:34, 33F
→
04/29 14:09, , 34F
04/29 14:09, 34F
※ 編輯: shenhsu 來自: 140.115.48.144 (04/29 15:21)
推
04/29 21:46, , 35F
04/29 21:46, 35F
→
04/29 21:47, , 36F
04/29 21:47, 36F
→
04/29 21:49, , 37F
04/29 21:49, 37F
→
04/29 21:49, , 38F
04/29 21:49, 38F
推
04/29 21:51, , 39F
04/29 21:51, 39F
推
04/29 21:58, , 40F
04/29 21:58, 40F
→
04/29 21:59, , 41F
04/29 21:59, 41F
→
04/29 21:59, , 42F
04/29 21:59, 42F
→
04/29 22:00, , 43F
04/29 22:00, 43F
→
04/29 22:03, , 44F
04/29 22:03, 44F
推
04/29 22:41, , 45F
04/29 22:41, 45F
推
04/29 23:17, , 46F
04/29 23:17, 46F
→
04/29 23:21, , 47F
04/29 23:21, 47F
推
04/29 23:39, , 48F
04/29 23:39, 48F
→
04/29 23:40, , 49F
04/29 23:40, 49F
→
04/29 23:41, , 50F
04/29 23:41, 50F
推
05/01 13:51, , 51F
05/01 13:51, 51F
→
05/01 13:52, , 52F
05/01 13:52, 52F
→
05/01 13:52, , 53F
05/01 13:52, 53F
→
05/01 13:53, , 54F
05/01 13:53, 54F
→
05/13 19:54, , 55F
05/13 19:54, 55F