解像度: 0.82→19.4 Å / Num. parameters: 20678 / Num. restraintsaints: 25680 / 交差検証法: FREE R / σ(F): 0 / 立体化学のターゲット値: ENGH & HUBER 詳細: HYDROGEN ATOMS WERE INCLUDED IN THE REFINEMENT AS "RIDING HYDROGENS", WITH POSITION AND GEOMETRY FIXED TO THOSE VALUES DEFINED BY SHELXL-97. METHYL AND HYDROXYL HYDROGENS ON SINGLE-CONFORMER ...詳細: HYDROGEN ATOMS WERE INCLUDED IN THE REFINEMENT AS "RIDING HYDROGENS", WITH POSITION AND GEOMETRY FIXED TO THOSE VALUES DEFINED BY SHELXL-97. METHYL AND HYDROXYL HYDROGENS ON SINGLE-CONFORMER SIDECHAINS WERE EACH POSITIONED AT A TORSION ANGLE THAT BEST SATISFIED POSITIVE DIFFERENCE ELECTRON DENSITY (USING INSTRUCTIONS HFIX 137 AND HFIX 147, RESPECTIVELY). IT SHOULD BE NOTED THAT THE LENGTH OF DONOR-HYDROGEN BONDS IN THIS STRUCTURE ARE LIKELY SHORTER THAN THEIR TRUE INTERNUCLEAR DISTANCE; THESE BOND LENGTHS ARE DEFINED BY SHELXL-97 PARAMETERS. THE POSITIONS OF ONLY FIVE HYDROGEN ATOMS WERE ALLOWED TO REFINE FREELY: HIS57 HD1, HIS57 HE1, HIS57 HE2, SER214 HG, AND GLY193 HN. DURING THE FINAL STAGES OF REFINEMENT, GEOMETRICAL RESTRAINTS WERE RELEASED FOR ALL NON- HYDROGEN ATOMS IN RESIDUES WITH SINGLE CONFORMATIONS. SEE PUBLICATION FOR MORE DETAILS.