I would say definitely not a quasicrystal, just multiple crystals, but the 
spots look like salt spots to me, being very sharp and intense. The puzzling 
thing is that the low-resolution zone is so populated, which would argue a bit 
against salt.

JPK

+++++++++++++++++++++++++++++++++++++++++++++++++
Jacob Pearson Keller
Research Scientist / Looger Lab
HHMI Janelia Research Campus
19700 Helix Dr, Ashburn, VA 20147
Desk: (571)209-4000 x3159
Cell: (301)592-7004
+++++++++++++++++++++++++++++++++++++++++++++++++

The content of this email is confidential and intended for the recipient 
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From: yu....@sanofi.com [mailto:yu....@sanofi.com]
Sent: Tuesday, February 13, 2018 4:03 PM
To: Keller, Jacob <kell...@janelia.hhmi.org>; CCP4BB@JISCMAIL.AC.UK
Subject: RE: [ccp4bb] protein quasicrystals?

As asked by a few people, here are the images of crystals and diffraction.

Thanks,
Yu

From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of Keller, 
Jacob
Sent: Tuesday, February 13, 2018 4:00 PM
To: CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK>
Subject: [EXTERNAL] Re: [ccp4bb] protein quasicrystals?

I also would love to see an imageā€¦.

JPK

+++++++++++++++++++++++++++++++++++++++++++++++++
Jacob Pearson Keller
Research Scientist / Looger Lab
HHMI Janelia Research Campus
19700 Helix Dr, Ashburn, VA 20147
Desk: (571)209-4000 x3159
Cell: (301)592-7004
+++++++++++++++++++++++++++++++++++++++++++++++++

The content of this email is confidential and intended for the recipient 
specified in message only. It is strictly forbidden to share any part of this 
message with any third party, without a written consent of the sender. If you 
received this message by mistake, please reply to this message and follow with 
its deletion, so that we can ensure such a mistake does not occur in the future.

From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of James 
Phillips
Sent: Tuesday, February 13, 2018 3:03 PM
To: CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK>
Subject: Re: [ccp4bb] protein quasicrystals?

There are programs which are good at indexing patterns from multiply twinned 
crystals. Bruker AXS has one, to my knowledge. There may be other sources. I 
suggest you try that first before you invoke a quasicrystal explanation.




James Phillips

On Tue, Feb 13, 2018 at 12:07 PM, Takanori Nakane 
<tnak...@mrc-lmb.cam.ac.uk<mailto:tnak...@mrc-lmb.cam.ac.uk>> wrote:
Hi,

"dials.reciprocal_space_viewer" is very useful to identify multiple lattices.
For quasicrystal and modulated crystals, "dials.rs_mapper" is also very
useful.

Best regards,

Takanori Nakane

> Have you tried microseeding of these sphere crystals? It may help to get
> better crystals.
>
>
> Burak
>
> ________________________________
> From: CCP4 bulletin board 
> <CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK>> on behalf of Yu Qiu
> <yu....@sanofi.com<mailto:yu....@sanofi.com>>
> Sent: 13 February 2018 15:09:43
> To: CCP4BB@JISCMAIL.AC.UK<mailto:CCP4BB@JISCMAIL.AC.UK>
> Subject: [ccp4bb] protein quasicrystals?
>
>
> Hi,
>
>
>
> I have been trying to crystallize a protein complex and keep getting
> sphere shape crystals. The diffraction is around 3 angstrom, but looks
> like multiple lattices. I am wondering if it could be a quasi crystal? Is
> there anyone has such experience?
>
>
>
> Thanks,
>
> Yu
>

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