Re: [ccp4bb] protein/dna complex crystal

2007-10-17 Thread Christian Biertumpfel
Hi Steve, You should definitively follow Jürgen's suggestion and try to solve the structure. If you could get an idea about the crystal packing it would help you to optimize your DNA construct. This is often critical in protein-nucleic acid crystallization. You could try to change the length of you

Re: [ccp4bb] protein/dna complex crystal

2007-10-17 Thread Juergen Bosch
W.M. B. wrote: Dear All: My protein/DNA complex crystal diffracts to 3.2 A ( in-house source). It crystalized in 20% PEG 8K, NaCaCo 6.5. I tried to add ATP, CaCl2 and spermidine. The diffaction doesn't improve. Would you please give me some advice? Thanks a lot, Steve How does

[ccp4bb] protein/dna complex crystal

2007-10-17 Thread W.M. B.
Dear All: My protein/DNA complex crystal diffracts to 3.2 A ( in-house source). It crystalized in 20% PEG 8K, NaCaCo 6.5. I tried to add ATP, CaCl2 and spermidine. The diffaction doesn't improve. Would you please give me some advice? Thanks a lot, Steve