Re: [ccp4bb] Crystals with Organic solvents

2011-08-30 Thread Patrick Shaw Stewart
Hi Eswar Firstly, I would certainly try crystal seeding into random screens if you haven't already tried it.  Refs below. Secondly, it's very convenient to grow the crystals under oil, and to soak the organic solvents into the drops, through the oil.  This makes it much easier to harvest the

[ccp4bb] Crystals with Organic solvents

2011-08-26 Thread eswar reddy
Dear All I was working on a Human protein and expression and solubility is good in E.coli and purification is One step (His-Tag), and i need to cleave the Histag before screens, if not the protein will precipitated and Aggregated, but after trying for 1.2 years i have

Re: [ccp4bb] Crystals with Organic solvents

2011-08-26 Thread Bosch, Juergen
Depending on how big your broccoli is I would simply crush them and mount as big of a piece as possible and see how well it diffracts. I assume you have tried already: - glycerol - changing protein:reservoir ratios - temperature - adding oil to either / and the reservoir, your drop -crushed up

Re: [ccp4bb] Crystals with Organic solvents

2011-08-26 Thread Van Den Berg, Bert
: [ccp4bb] Crystals with Organic solvents Dear All I was working on a Human protein and expression and solubility is good in E.coli and purification is One step (His-Tag), and i need to cleave the Histag before screens, if not the protein will precipitated and Aggregated