loop_ _refine_ls_shell.pdbx_refine_id _refine_ls_shell.d_res_low _refine_ls_shell.d_res_high _refine_ls_shell.number_reflns_obs _refine_ls_shell.R_factor_obs 'X-ray' 8.00 4.51 1226 0.196 'X-ray' 4.51 3.48 1679 0.146 'X-ray' 3.48 2.94 2014 0.160 'X-ray' 2.94 2.59 2147 0.182 'X-ray' 2.59 2.34 2127 0.193 'X-ray' 2.34 2.15 2061 0.203 'X-ray' 2.15 2.00 1647 0.188