Re: [ccp4bb] turn granular to crystal

2010-08-27 Thread Roberto Steiner
Dear Rui, I can only support Patrick's view on MMS. We've got some very good results with this technique in one tricky case in which the starting point wasn't much better than yours. In addition to the papers Patrick suggested the following might also be worth a look: The role of bias in

Re: [ccp4bb] turn granular to crystal

2010-08-27 Thread Patrick Shaw Stewart
k] On Behalf Of rui Sent: 25 August 2010 13:37 To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] turn granular to crystal Hi, All, I'm trying to crystallize a soluble protein and got something like granular, they are rounded shaped and not so regular and also don't have sharp edges. See the a

Re: [ccp4bb] turn granular to crystal

2010-08-27 Thread Tim
-- > yybbll > > *发件人:* rui > *发送时间:* 2010-08-27 02:04:54 > *收件人:* yybbll > *抄送:* > *主题:* Re: [ccp4bb] turn granular to crystal > hi, > > no , I didn't use detergent. THe composition of the well buffer is > just

Re: [ccp4bb] turn granular to crystal

2010-08-26 Thread yybbll
rui 发送时间: 2010-08-27 02:04:54 收件人: yybbll 抄送: 主题: Re: [ccp4bb] turn granular to crystal hi, no , I didn't use detergent. THe composition of the well buffer is just PEG4000 and MgCl2 and NaAc. On Wed, Aug 25, 2010 at 9:52 AM, yybbll wrote: Hi, Did you use detergent? It

Re: [ccp4bb] turn granular to crystal

2010-08-25 Thread Roger Rowlett
I would try the following approach, some of which you may have done already: Broad pH screen, by 0.5 pH units to see if you are in the pH sweet spot. Finer PEG-4000 screen at the pH identified in the pH screen--the precipitate in the we

Re: [ccp4bb] turn granular to crystal

2010-08-25 Thread Georg Zocher
Hi Rui, I would try the additive screen. http://hamptonresearch.com/product_detail.aspx?cid=1&sid=36&pid=27 Best Regards, Georg rui schrieb: Hi, All, I'm trying to crystallize a soluble protein and got something like granular, they are rounded shaped and not so regular and also don't have

Re: [ccp4bb] turn granular to crystal

2010-08-25 Thread yybbll
Hi, Did you use detergent? It seems look like detergent crystals. 2010-08-25 yybbll 发件人: rui 发送时间: 2010-08-25 20:37:18 收件人: CCP4BB 抄送: 主题: [ccp4bb] turn granular to crystal Hi, All, I'm trying to crystallize a soluble protein and got something like granular, they are ro