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3% NuSieve gel electrophoresis


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#1 Eternal city

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Posted 09 August 2010 - 11:33 AM

Hi guys,

I made 3% NuSieve gel
Nusieve 1.5g
1* TBE buffer 50 ml

,and did electrophoresis twice.

I add 10 microliter of EtBr in the gel tank which is filled with 1* TBE buffer.


I put 20 microliters of each sample(w/4 microliters of gel loading buffer) and 20 microliters of 1kb ladder.


I did this for restriction mapping


But as you can see in the picture which I attached, the 1kb ladder did not move well (the far left lane without the number is for the ladder).
So I cannot tell the size.

Have you guys had the same kind of problems?

Doesn't the 1kb ladder move well in the 3% NuSieve gel?

I don't know what to do.


Thanks,

JA

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Edited by Eternal city, 09 August 2010 - 11:42 AM.


#2 mdfenko

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Posted 09 August 2010 - 08:33 PM

why did you make the gel 3%? this percentage is useful for separating small dnas. what size range are you looking to separate?
talent does what it can
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#3 Eternal city

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Posted 10 August 2010 - 06:16 AM

Hi, Thanks for the reply.

1st lane : 1kb Ladder
Lane 1 : 1kb, 3.7kb (SpeI)
Lane 2 : 0.1kb, 1kb, 3.5kb (EcoRI & SalI)
Lane 3 : 0.3kb, 0.6kb, 3.5kb (EcoRI)
Lane 4 : 0.5kb, 3.8kb (BamHI)

I need to do restriction mapping.

So, isn't this good for 3.5kb, 3.7kb, and 3.8kb?

Should I just run the gel for a longer time?

Edited by Eternal city, 10 August 2010 - 06:23 AM.


#4 mdfenko

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Posted 11 August 2010 - 11:44 AM

for 3.5, etc, the 1 kb ladder is okay and, yes, you should run it more.

but, for the smaller fragments you may want to use a second ladder which covers that range.
talent does what it can
genius does what it must
i do what i get paid to do




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