You may be able to check whether the cyrstals are protein or detergent
this using powder diffraction. (please excuse the shameless plug):
Acta Cryst. (2008). A64, 169-180 "Powder crystallography on macromolecules"
I. Margiolaki and J. P. Wright
http://journals.iucr.org/a/issues/2008/01/00/sc5011/index.html
Good luck,
Jon
Hubing Lou wrote:
You didn't mention which detergent in the conditions. From the picture it looks
like crystals of detergent.
Quoting Ngo Duc Tri <[EMAIL PROTECTED]>:
> Dear ccp4 users,
> I crystallized a membrane protein and got some conditions showing the small
> needle crystals. All condition contained Mg2+ and high buffer pH.
> I learn that it is difficult to optimize the needle crystal. However I
> would like to ask your experience how to optimize in this case.
> Here is the attached picture of my crystal. Thank you very much for your
> advices!
>
> My best regards,
> TriNgo
> PhD Student - Sungkyunkwan University, Korea
>
