「DNA cloning tips」の編集履歴（バックアップ）一覧はこちら
「DNA cloning tips」(2010/08/26 (木) 20:53:10) の最新版変更点
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04/Aug/2010:
The resulet was failure...
Why can't I do single ligation?
14/Jun/2010:
The result of BAP treatment
#image(colonies.BMP,width=200,height=250,title=PTEN)
Got it!!
A lot of colonies I got without BAP treatment disapeared perfectly even though sample colonies are there.
This data indicates that the colonies in the control plate is due to self-ligation of vector, and is a great step for me. I have new tip to remove background.
13/Jun/2010:
I did ligation again.
But a lot of colonies come up in both, ctrl and sample, again.
Normaly thinking is that the vector is not cut enough.
However I carried out enzyme cut for 5 hours.
I can't believe that...
Anyhow I did BAP treatment.
I am gonna compare the samples with or without BAP treatment.
30/Jun/2010:
I did ligation. However uncountable many colony comes up even in a control plate.
(Experimental procedure)
I put 400ng cDNA vector.
I put 2microg insert.
I purified both DNAs.
Takara ligation kit ver. 2.1 was used.
I enter 6 microl ligation solution, 5microl insert, 1 microl vector.
on ice for 5 min.
heart shock for 45 sec.
on ice for 5 min.
Add 400 microl SOC buffer and incubated 30min.
plating this solution.
The points I doubt..
1. Exactly KpnI and XhoI works some extent, because the cut insert band is visible. However possibly the ability of cut of enzyme becames lower.
I used KpnI earlier and works well.
So I guess kpnI is gonna fine.
Concern is XhoI.
So what I have to do is to change enzyme.
2. There a monster of colony both in control and insert plate.
I suspect that SOC from Takara is contaminated.
I am gonna use LB buffer I prepared.
Solution: comtamination check.
3. If there is not containing Amp, all of colonies are gonna come up.
I am gonna contain Amp in the plate in advance.
Solution: Possibly the concentration of Amp is low. I am gonna
plate E.coli without amp on the amp plate.
4. Effect of dam methylase
I look up the effect of dam methylase on kpnI and XhoI. But there is no referenece for this. So, It is gonna be no problem.
26/Aug/2010:
I finally have got PIP3FLIMPSD version.
I was very tired..
I started this project from 28May2010.
I finished 25Aug2010. 3 month!!!
What a hell I doing??
The points I improve are... I don't know...
I did the experiments this time carefully.
Of course, I did earlier.
One hard point I got is that I can not cut DNA with enzyme.
Possibly incubation time was short..
In addition, I did enzyme cut for vectors twice during ligation.
And for me, PAP was not so useful...
04/Aug/2010:
The resulet was failure...
Why can't I do single ligation?
14/Jun/2010:
The result of BAP treatment
#image(colonies.BMP,width=200,height=250,title=PTEN)
Got it!!
A lot of colonies I got without BAP treatment disapeared perfectly even though sample colonies are there.
This data indicates that the colonies in the control plate is due to self-ligation of vector, and is a great step for me. I have new tip to remove background.
13/Jun/2010:
I did ligation again.
But a lot of colonies come up in both, ctrl and sample, again.
Normaly thinking is that the vector is not cut enough.
However I carried out enzyme cut for 5 hours.
I can't believe that...
Anyhow I did BAP treatment.
I am gonna compare the samples with or without BAP treatment.
30/Jun/2010:
I did ligation. However uncountable many colony comes up even in a control plate.
(Experimental procedure)
I put 400ng cDNA vector.
I put 2microg insert.
I purified both DNAs.
Takara ligation kit ver. 2.1 was used.
I enter 6 microl ligation solution, 5microl insert, 1 microl vector.
on ice for 5 min.
heart shock for 45 sec.
on ice for 5 min.
Add 400 microl SOC buffer and incubated 30min.
plating this solution.
The points I doubt..
1. Exactly KpnI and XhoI works some extent, because the cut insert band is visible. However possibly the ability of cut of enzyme becames lower.
I used KpnI earlier and works well.
So I guess kpnI is gonna fine.
Concern is XhoI.
So what I have to do is to change enzyme.
2. There a monster of colony both in control and insert plate.
I suspect that SOC from Takara is contaminated.
I am gonna use LB buffer I prepared.
Solution: comtamination check.
3. If there is not containing Amp, all of colonies are gonna come up.
I am gonna contain Amp in the plate in advance.
Solution: Possibly the concentration of Amp is low. I am gonna
plate E.coli without amp on the amp plate.
4. Effect of dam methylase
I look up the effect of dam methylase on kpnI and XhoI. But there is no referenece for this. So, It is gonna be no problem.
