Hi,

maybe you solved your problem,
if not, you can try this : You prepare your protein at high salt concentration. After that you add your ssDNA directly and you proceed by dialysis. You prepare your dialysis with a low salt concentration buffer. You can use different buffer by step in order to avoid a too fast salt concentration decrease. This method can allow progressive assembly of your complex.

Nicolas

Le 31/10/10 08:06, dengzq1987 a écrit :
Hi all,
I want to sovle the structrue of ssDNA -protein complex.but the protein are unstable at low salt concentration,so we use 1M Nacl in the buffer. the high salt content may disrupt the complex.and I don't know which ssDNA lenght try fist.any suggestion or experience are welcome.
thank you!
2010-10-31
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dengzq1987

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