| X-RAY DIFFRACTION |
? |
296 |
Mb(H64G,V68A) at 3.6 mM in 20 mM Tris-HCl pH 8.4, 1 mM EDTA, was mixed with an equal volume of reservoir solution (200 mM Tris-HCl pH 8.9 and 2.46 M ammonium sulfate). The crystal was dunked in a cryoprotection solution (reservoir buffer supplemented with 9% sucrose (w/v), 2% glucose (w/v), 8% glycerol (v/v), and 8% ethylene glycol (v/v)) prior to being flash-frozen in liquid nitrogen. Note that imidazole was present in lysis buffer at 10 mM prior to two-step purification. |
