Re: [ccp4bb] C2/I2 space groups

2014-05-23 Thread Antonio L. Llamas-Saiz
ntonio.lla...@usc.es - -Original Message- From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of Phil Evans Sent: Wednesday, May 21, 2014 9:07 PM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] C2/I2 space groups I2 and C2 are different

Re: [ccp4bb] C2/I2 space groups

2014-05-21 Thread Phil Evans
I2 and C2 are different settings of the same group. The official IUCr convention is to use the one which gives the beta angle closer to 90 degrees. As far as I know all programs should now be able to use the I2 setting, but if it worries you, you can reindex to C2 Phil On 21 May 2014, at 17:54

Re: [ccp4bb] C2/I2 space groups

2014-05-21 Thread Armando Albert
If you do not specify that you prefer C2, pointless change to I2. This is sometimes odd, for instance when running molrep or shelx (hkl2map) afterwards Armando I am out of the lab > El 21/05/2014, a las 18:54, Roberto Battistutta > escribió: > > Dear All, > a question about C2 and I2 space g

Re: [ccp4bb] C2/I2 space groups

2014-05-21 Thread Bernard D Santarsiero
You can always re-index a monoclinic unit cell with beta greater than 120deg. Usually the beta closer to 90deg is preferred, but either will work. Bernie Santarsiero On May 21, 2014, at 11:54 AM, Roberto Battistutta wrote: > Dear All, > a question about C2 and I2 space groups. > Processing

[ccp4bb] C2/I2 space groups

2014-05-21 Thread Roberto Battistutta
Dear All, a question about C2 and I2 space groups. Processing a dataset, XDS output says C2, with dimensions 122.8, 56,9 81,5 and beta 125.1°. Aimless reindexes to I2 with 81.6, 56.9, 101.1 and 96.2°. Phenix (refine) returns a warning "NOTE: non-standard setting used: I 1 2 1". In the PDB there ar