Re: [ccp4bb] Aggregated protein for crystallization

2012-02-21 Thread Puey Ounjai
Hi, Your idea does sound really crazy but actually Jacob had made a very good valid point. Question is do you think your aggregate still functioning or not, if not, can you revive them in vitro and how effective is your refolding process if you are going to refold them? You may want to take a loo

Re: [ccp4bb] 2D

2009-01-09 Thread Puey Ounjai
Hello, The information you provided to us here is not enough. there are so many parameters and so many means to optimize 2D crystal. All of which depends on what kind of protein you are working on (membrane associated or soluble) and what kind of technique that you use to grow your crystal (l

Re: [ccp4bb] 2D

2009-01-12 Thread Puey Ounjai
exists in solution as a dimer. > The technique is hanging drop, vapor diffusion. And the mother liquor is > ~ 0.1 mM cacodylate pH 6.2ish, MgCl2 and PEG 20k. > > =v= > > > -Original Message- > From: Puey Ounjai > To: CCP4BB@JISCMAIL.AC.UK > Sent: Fri, 9 Jan

Re: [ccp4bb] purification

2009-03-20 Thread Puey Ounjai
Hi Kien, As Artem pointed out earlier. Are you sure that your protein folded correctly. You want to make sure that the protein is expressed in lipid membrane not in inclusion body. If so, considering changing the host might be a good idea. Also, did you use any kind of detergent when you extract

Re: [ccp4bb] Refolding of Denatured Protein

2009-05-06 Thread Puey Ounjai
In fact, I agree with Artem that detergent can be very difficult to get rid of. It totally depend on the property of detergent. In your case that the protein has no transmembrane region. You probably dont need much detergent in your solution to keep your protein happy. I dont think having detergent