g***j 发帖数: 40861 | |
m**z 发帖数: 787 | 2 B subtilis? it can be natually competent in some specialized medium when it
reaches certain OD. we routinely transform it with plasmid, PCR product or
chromosomal DNA
【在 g***j 的大作中提到】 : 电转和普通转化都不行 : 有啥指导?
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g***j 发帖数: 40861 | 3 yes,it is B.S 168
Can you send me a protocol?
it
【在 m**z 的大作中提到】 : B subtilis? it can be natually competent in some specialized medium when it : reaches certain OD. we routinely transform it with plasmid, PCR product or : chromosomal DNA
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m**z 发帖数: 787 | 4 i have a scanned copy of the protocol. I can send you an email if you give
me your email address
【在 g***j 的大作中提到】 : yes,it is B.S 168 : Can you send me a protocol? : : it
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g***j 发帖数: 40861 | 5 Thanks a lot.
please send to s*****[email protected].
【在 m**z 的大作中提到】 : i have a scanned copy of the protocol. I can send you an email if you give : me your email address
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m**z 发帖数: 787 | 6 sent
【在 g***j 的大作中提到】 : Thanks a lot. : please send to s*****[email protected].
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l**********1 发帖数: 5204 | 7 Just curiously,
it looks your avoided Oct 01 (your born date) as your mail address,
so used below mail address even that 09 31 is just a metaphysical date,
what happened when you applied your gmail address?
szy1001(at)gamil.com already be took by other stuff?
【在 g***j 的大作中提到】 : Thanks a lot. : please send to s*****[email protected].
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g***j 发帖数: 40861 | 8 why do you think my birthday is 1001?
【在 l**********1 的大作中提到】 : Just curiously, : it looks your avoided Oct 01 (your born date) as your mail address, : so used below mail address even that 09 31 is just a metaphysical date, : what happened when you applied your gmail address? : szy1001(at)gamil.com already be took by other stuff?
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l**********1 发帖数: 5204 | 9 just 6th Cognitive feelings
from your that mail address and some similar my friends their same style
address.
【在 g***j 的大作中提到】 : why do you think my birthday is 1001?
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n******t 发帖数: 1281 | 10 FYI:
http://www.bacillusbbs.com/
Bacillus subtilis strain with inducible super-competence.
Zhang, X. Z. and Y. H. Zhang. 2011. Simple, fast and high-efficiency
transformation system for directed evolution of cellulase in Bacillus
subtilis. Microb. Biotechnol. 4:98-105. PMID: 21255377 read online
枯草杆菌感受态细胞的制备及转化
1) 将菌种接种在LB平板上37 ℃培养过夜。
2) 用接种环接一环菌苔于5mL GM I 溶液,在30 ℃慢摇床(125 r/min)振荡培养
过夜。
3) 次日取2 mL转接到18 mL GM I 中,37 ℃快摇床(250 r/min)培养3.5 h。
4) 再取10 mL上一步骤的培养液转接到90 mL GM II 中,37 ℃慢摇床培养90 min后
5,000 g,10 min离心收集菌体。
5) 用10 mL原培养液上清液轻轻悬浮菌体,悬浮后的菌体即为感受态细胞可以直接
用来转化。
6) 感受态细胞的保存:加30%的灭菌甘油至终浓度为10%,混匀后分装到离心管中(
0.5 mL/tube),随即放到-70 ℃保存。
7) 转化时取出离心管,放在45 ℃水浴中溶化,然后在0.5 mL菌液中加入适量DNA(
~1 ug/ml)。
8) 于37 ℃振荡(200 r/min)保温30 min后涂布相应抗性平板,再在37 ℃培养过
夜,次日检查和验证转化子。
枯草杆菌普通化学感受态细胞制备用试剂
[1] 10×最低盐溶液:K2HPO4 70 g,KH2PO4 30 g,(NH4)2SO4 10 g,(
Na3C6H5O7•2H2O)5 g,MgSO4•7H2O 1 g,在蒸馏水中依次溶解,加水至
500 mL。
[2] 氨基酸溶液(根据不同菌株的基因缺陷型准备):10 mg/mL,贮于棕色瓶内,
113℃灭菌30 min,用黑纸包裹。
[3] GM I溶液:1×最低盐溶液95.6 mL,20%葡萄糖2.5 mL,5%水解酪蛋白0.4 mL,
10%酵母汁1 mL,10 mg/mL氨基酸溶液0.5 mL(50 μg/mL)。
[4] GM I溶液:1×最低盐溶液96.98 mL,20%葡萄糖2.5 mL,5%水解酪蛋白0.08 mL
,10%酵母汁0.04 mL,1 M MgCl2 0.25 mL(2.5 mM),1 M CaCl2 0.05 mL(0.5 mM)
,10 mg/mL氨基酸溶液0.1 mL(5 μg/mL)。
【在 g***j 的大作中提到】 : 电转和普通转化都不行 : 有啥指导?
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