Re: [ccp4bb] Difficult MR structures

2009-12-10 Thread Jeremiah Farelli
Hi, If I were you, I would collect a redundant dataset (~15-20 or even higher if possible) at home and use the anomalous flag in Scalepack/Denzo. You should be able to pick up the anomalous differences (especially with data to 2.0A) for Se, even at CuKa wavelength at home! Good luck! <>

Re: [ccp4bb] Difficult MR structures

2009-12-10 Thread Anastassis Perrakis
some good phasing. Tassos From: CCP4 bulletin board [ccp...@jiscmail.ac.uk] On Behalf Of Narayanan Ramasubbu [ramas...@umdnj.edu] Sent: Thursday, December 10, 2009 4:40 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] Difficult MR structures Deal All: I have

Re: [ccp4bb] Difficult MR structures

2009-12-10 Thread Vellieux Frederic
Dear Subbu, One more thing you can do is to search with an ensemble of structures (4 in your case) for molecular replacement. Fred. Narayanan Ramasubbu wrote: Deal All: I have a 2.0 A data for a SeMet protein (native crystal not available yet!) that has 6 Se sites. The cell comes out to be

[ccp4bb] Difficult MR structures

2009-12-10 Thread Narayanan Ramasubbu
Deal All: I have a 2.0 A data for a SeMet protein (native crystal not available yet!) that has 6 Se sites. The cell comes out to be 65 67 101 and the angles are all very close to 90. The data set was collected in house with Cu 1.5418 A We integrated and scale in orthorhombic and the statistics