[ccp4bb] Fw: Re: [ccp4bb] Phantom Crystals

2009-06-20 Thread Debajyoti Dutta
Note: Forwarded message attached -- Original Message -- From: "Debajyoti Dutta" debajyoti_dutt...@rediffmail.com To: deti...@hwi.buffalo.edu Subject: Re: [ccp4bb] Phantom Crystals--- Begin Message --- There may be a chance of getting crystal like formations. This I presume the ppt o

Re: [ccp4bb] Molecular Replacement of a small peptide

2009-06-20 Thread Nicholas M Glykos
Hi Allen, With such low solvent content (and corresponding tight packing), you may want to give 'Queen of spades (Qs)' a try. The reason being that Qs is not (at least directly) a Patterson-based method (and does not assume that intra-molecular vectors are topologically segregated). If you expe

Re: [ccp4bb] Molecular Replacement of a small peptide

2009-06-20 Thread George M. Sheldrick
If you have 1.1A data and your structure is not too large, ab initio direct methods (e.g. with SHELXD) will probably solve the structure. I would be happy to advise if you wish to try this. George Prof. George M. Sheldrick FRS Dept. Structural Chemistry, University of Goettingen, Tammannstr. 4,