Dear all, 

Below is a question my friend asked me, but I have never worked on  
phosphorylated proteins.
Has anyone worked on crystallizing phosphorylated proteins and can you comment 
on it?

Thanks

Rongjin Guan 
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I would like to ask how feasible it is to crystalize protein containing 
post-translational modification, such as phosphorylation.  To my limited 
knowledge, I think the heterogenicity of modified and unmodified proteins 
causes the major obstacle in the crystal structure.  Is there any specific 
method to crystalized modified proteins (like phosphorylated proteins ) these 
days?

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