| X-RAY DIFFRACTION |
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291 |
Using a PEG/salt combination as a precipitant. Briefly, EED was incubated with 10 mM B-nicotinamide adenine dinucleotide hydrate, 2 mM of a tightly binding proprietary compound, and 0.5 mM of a synthesized peptide which comprises the helix on EZH2 which interacts with EED. The crystals were grown using the vapor diffusion method. One uL of the protein mixture was combined with 1 uL of a precipitant comprised of 20% (w/v) PEG3350, 0.2 M potassium iodide, and 0.1M Tris-HCl, pH 8.5, on a cover slip which was suspended over a reservoir comprised of 0.5 mL of precipitant at 18 Celsius and sealed. The crystals grew in 4-6 days at 18 Celsius and then harvested and soaked in defined drops consisting of 30 uL of precipitant and 2 mM of compound for 24 h. Crystals were cryopreserved for data collection using a cryosolution consisting of 30% PEG 400 (v/v), 20% (w/v) PEG 3350, 0.2 M potassium iodide, and 0.1M Tris-HCl, pH 8.5 |
