Re: [ccp4bb] X-ray pattern has streaks

2013-10-03 Thread James Holton
Depends a bit on what the "streaks" look like. If they are curved, and your "streaks" are connecting partial rings at different resolutions, then what you may be seeing is simply diffuse scatter from a "small molecule", such as ice. The only way to be sure you are looking at protein is if you

Re: [ccp4bb] X-ray pattern has streaks

2013-10-03 Thread Mark van der Woerd
- improve the crystal or improve the freezing conditions. Mark -Original Message- From: Demetres D. Leonidas To: CCP4BB Sent: Thu, Oct 3, 2013 7:05 am Subject: Re: [ccp4bb] X-ray pattern has streaks Dear Krithika, what you probably see is the diffraction pattern of a highly

Re: [ccp4bb] X-ray pattern has streaks

2013-10-03 Thread Swastik Phulera
One standard thing to do would be to set up a grid around the condition and then try picking crystals from different well to see if any of them produce better looking diffraction patterns. If that does not work one might give any of the commercially available additive screen a try to see if diffrac

Re: [ccp4bb] X-ray pattern has streaks

2013-10-03 Thread Demetres D. Leonidas
Dear Krithika, what you probably see is the diffraction pattern of a highly mosaic crystal due to probably internal disordering. cheers Demetres On 3/10/2013 3:40 μμ, Krithika GOkulnath wrote: I introduce myself as Dr.Krithika Gokulnath, CAS in crystallography and Biophysics, UNiversity o

[ccp4bb] X-ray pattern has streaks

2013-10-03 Thread Krithika GOkulnath
I introduce myself as Dr.Krithika Gokulnath, CAS in crystallography and Biophysics, UNiversity of Madras. I have been working with a cloned protein and have been successfully able to crystallise it. However data collection done at home source shows a pattern of streaks instead of spots. The crys