| X-RAY DIFFRACTION |
8.0 |
293 |
3.0 ul of protein solution was mixed with 1.0 uL of crystallization solution and hung upside-down in a sealed chamber containing 1mL of well solution.
During crystallization, an unknown protease contaminant in the protein solution cleaved FL DdrC between residues 98 and 99, allowing for crystallization of residues 1-98.
Protein solution:
257uM DdrC,
800mM NaCl
20mM Tris, pH 8.0
5% (v/v) Glycerol
Unknown protease contaminant
Crystallization solution (Midas1 - MD1-59 condition #91):
15% (v/v) Sokolan-CP42
200mM Potassium citrate tribasic
Well solution:
3.25M Ammonium sulfate |