[ccp4bb] yellow crystals

[Caitlyn Claire Yeykal]

Hi -- has anyone had crystals that are colored in regular  
(unpolarized) light?  Mine are yellow, and I'm not aware of anything  
in the buffer conditions that might cause this.  I read online that  
glutaraldehyde can turn protein crystals a golden color, but as far as  
I know there isn't any of that in the well.  Purified in HBS pH 7.2;  
crystallized in LiCl/PEG4K/Tris pH 8.  Any explanations?

Thanks!
Caitlyn
____________________________________
Caitlyn C. Yeykal
Mrksich Group/Adams Group
Dept. of Biochemistry, University of Chicago
929 E. 57th St., Rm 547B
Chicago, IL  60615
cait...@uchicago.edu