| X-RAY DIFFRACTION |
7.0 |
292 |
Essentially defatted human serum albumin from Sigma was purified by size exclusion chromatography to obtain pure monomeric protein. The purified HSA was dissolved in 50 mM potassium phosphate, 150 mM sodium chloride (pH 7.5) and concentrated to 2 mM (140 mg/mL). The HSA solution was incubated with a six fold excess of the NBD-labelled fatty acid at 4-5 deg.C for 4 hours. The final concentration of dimethyl sulfoxide was 2% (v/v). The crystal was grown by the hanging drop vapor diffusion method using a reservoir solution containing buffer (2.5 mM potassium phosphate, 7.5 mM sodium chloride, pH 7.0), 0.3% glycerol and polyethylene glycol 3350 (~30%). For crystallization 1 uL of HSA-ligand solution was equilibrated against 1 uL of reservoir solution. |
