Re: [ccp4bb] **Possible spam**Re: [ccp4bb] FW: [ccp4bb] diffraction of spherulites

2011-04-06 Thread Colin Nave
> Sent: 06 April 2011 18:16 > To: Nave, Colin (DLSLtd,RAL,DIA) > Cc: CCP4BB@jiscmail.ac.uk > Subject: **Possible spam**Re: [ccp4bb] FW: [ccp4bb] diffraction of > spherulites > > It seems hard to imagine what there is anything in his solutions other > than protein that would

Re: [ccp4bb] FW: [ccp4bb] diffraction of spherulites

2011-04-06 Thread Jacob Keller
It seems hard to imagine what there is anything in his solutions other than protein that would make spherulites, no? PEG 8000 at 12% seems pretty benign, unless the trays or screens have been sitting around for quite a while... JPK On Wed, Apr 6, 2011 at 12:04 PM, Colin Nave wrote: > > > Stefan

[ccp4bb] FW: [ccp4bb] diffraction of spherulites

2011-04-06 Thread Colin Nave
Stefan Could the low angle reflections be from lamellar liquid crystals of the PEG (or a mixed PEG/water phase). Seems like you have 1st,2nd and 4th order reflections with presumably the 2nd order about 20A. I think 40A lamellar spacing is characteristic of some PEG liquid crystals. Colin From