Re: [ccp4bb] error in ccp4i

2009-05-17 Thread William Scott
The answer to this was to ensure that the file /etc/hosts is present and contains the line 127.0.0.1 localhost William G. Scott Contact info: http://chemistry.ucsc.edu/~wgscott/ On May 16, 2009, at 6:38 AM, Sebastiano Pasqualato wrote: hi there, I'm using ccp4 installed via fink

Re: [ccp4bb] How to improve crystal which is twinning?

2009-05-17 Thread Ho-Leung Ng
Try things that affect nucleation and kinetics of crystallization, such as seeding or crystallization at different temperatures. As Morten suggested, try different crystallization methods such as switching between hanging/sitting drop and microbatch. Screen protein concentration and protein:crystal

Re: [ccp4bb] How to improve crystal which is twinning?

2009-05-17 Thread Morten Sommer
Dear Heng, I assume you are growing your crystals using vapor diffusion. If your optimization efforts using various additives fail to give you suitable crystals you might consider trying to grow your crystals using a different technique. I would suggest a liquid diffusion based technique such

[ccp4bb] How to improve crystal which is twinning?

2009-05-17 Thread HanJie_HCT Tai
Hi, I have a 22kDa protein that the floopy N & C terminus have been deleted. It was crystallized in 35%MPD/0.1m Tris (pH 8.5)/0.2M/(NH4)2SO4 in 2 - 3 days. Previously, a few small twining crystals were grown in this condition. I tried Hampton Research 96-additive screen . Additives such