24小时热门版块排行榜    

查看: 434  |  回复: 0

wanglavender

新虫 (初入文坛)

[求助] Prad gen(0.23kb)克隆做不出来

Prad cloning, 我做了三遍都没做做出来, 大神们能不能帮我指导一下, 万分感谢
Prad gene0.24kb,
1. I designed 5' primer(BamH site and Kozak sequence), 3' primer(, Xbal site and three stop codon)
use NEB fushion polymerase to do pcr, follow the protocol and caculate the annealing T, then run the gel, ues 1kb ladder, find the band in the front, which indicates the pretty short band, namely prad gene. One problem is I loaded three lanes in the gel(I had three 25ul samples, didn't master mix), when I cut the gel, the 1st lane is pretty bright, while the other two lanes are shadow. They came from one pcr product, the brightness should be the same, while I didin't master mix them. So then I didi gel exaction the concentration is 18.9ng/ul, a bit low.
2 I use Pef6/V5 vector, use Bamh and Xbal to digest the Vector and prad Insert individually, use NEB curt smart buffer. Run the gel again, use 1kb ladder, for prad insert, the band is at the bottom, and for vector the band is a little higher than 5kb band. So this means I indeed cut the vecotr and insert.
3 I did PCR purification for insert and Gel extraction for vector, test the concentrations, Insert 10.1ng/ul, Vector 29.9ng/ul, Then I did ligation using Neb ligation enzyme. Then run the gel for analysis, I found the ligaiton band is almost the same as the vector band, because prad is very short-0.23kb, so 做完ligation后,跑胶,根本看不出plasmid有还是没有。
4,I did transformation, prepared two LB-agar plates, one loaded 20ulecoli+180LB medium, One loaded 180ecoli, 37oC for 16hrs, then put the 4oC fridge for 24hrs, to let insert degrade, 如果不这样做, 直接做cloning pcr, 跑出来的band都会和 template prad DNA的一样, 但其实是insert, 不是真的在ecoli中表达了。4度冰一天后, 拿出来做cloning pcr, 跑胶, 20个样, 有两个亮度只有template的一般, 其他的就基本看不到了。 学长说要取和Template带一样亮的, 我的没有哈, 就说没有转进去。 我做三遍了, cloning pcr跑完的带都像这样, 简而言之, 亮度达不到, 您能帮我看看是哪里有问题或该怎么改进吗?因为有个bioforum我也问了, 所以有些英文还有点长, 耽误你的时间了,万分感谢。
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

智能机器人

Robot (super robot)

我们都爱小木虫

找到一些相关的精华帖子,希望有用哦~

科研从小木虫开始,人人为我,我为人人
相关版块跳转 我要订阅楼主 wanglavender 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] 一志愿山东大学材料与化工325求调剂 +3 半截的诗0927 2026-03-02 3/150 2026-03-02 12:58 by houyaoxu
[考研] 272求调剂 +7 材紫有化 2026-02-28 7/350 2026-03-02 12:48 by 无际的草原
[考研] 275求调剂 +4 明远求学 2026-03-01 4/200 2026-03-02 12:45 by 无际的草原
[考研] 材料工程274求调剂 +4 Lilithan 2026-03-01 4/200 2026-03-02 12:06 by yuchj
[考研] 哈工大计算机刘劼团队招生 +4 hit_aiot 2026-03-01 6/300 2026-03-02 11:53 by 一声问好
[基金申请] 此成果不能导入原因:元数据必填信息不完整,可 进行补充。 +4 Kittylucky 2026-03-02 5/250 2026-03-02 11:07 by jurkat.1640
[考研] 一志愿郑大材料学硕298分,求调剂 +6 wsl111 2026-03-01 6/300 2026-03-02 11:00 by ydudjddnd
[考研] 264求调剂 +4 巴拉巴拉根556 2026-02-28 4/200 2026-03-02 10:48 by yuchj
[考研] 材料类求调剂 +11 wana_kiko 2026-02-28 14/700 2026-03-02 08:46 by 聪明的大松鼠
[基金申请] 本子写完了,给DS兄弟看了,得了92分 +3 Doma 2026-03-01 7/350 2026-03-02 00:00 by jnzsy
[考研] 材料化工调剂 +12 今夏不夏 2026-03-01 13/650 2026-03-01 23:32 by L135790
[考研] 0856材料求调剂 +11 hyf hyf hyf 2026-02-28 12/600 2026-03-01 18:57 by 18137688336
[考研] 291分工科求调剂 +9 science饿饿 2026-03-01 10/500 2026-03-01 18:55 by 18137688336
[考研] 328求调剂 +3 aaadim 2026-03-01 5/250 2026-03-01 17:29 by njzyff
[考研] 285求调剂 +8 满头大汗的学生 2026-02-28 8/400 2026-03-01 16:47 by caszguilin
[考研] 304求调剂 +6 曼殊2266 2026-02-28 7/350 2026-03-01 15:14 by wjLi2017
[考研] 材料284求调剂,一志愿郑州大学英一数二专硕 +10 想上岸的土拨鼠 2026-02-28 10/500 2026-03-01 14:12 by yc258
[考研] 317一志愿华南理工电气工程求调剂 +6 Soliloquy_Q 2026-02-28 11/550 2026-03-01 11:14 by 歌liekkas
[考研] 304求调剂 +3 52hz~~ 2026-02-28 5/250 2026-03-01 00:00 by 52hz~~
[硕博家园] 【博士招生】太原理工大学2026化工博士 +4 N1ce_try 2026-02-24 8/400 2026-02-26 08:40 by N1ce_try
信息提示
请填处理意见