#------------------------------------------------------------------------------ #$Date: 2012-02-03 19:16:24 +0200 (Fri, 03 Feb 2012) $ #$Revision: 32112 $ #$URL: file:///home/coder/svn-repositories/cod/cif/2/00/48/2004845.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/. The original data for this entry # were provided by IUCr Journals, http://journals.iucr.org/. # # The file may be used within the scientific community so long as # proper attribution is given to the journal article from which the # data were obtained. # data_2004845 loop_ _publ_author_name 'Vrielink, A.' 'Obel-Jorgensen, A.' 'Codding, P. W.' _publ_section_title ; Hippuryl-L-histidyl-L-leucine, a Substrate for Angiotensin Converting Enzyme ; _journal_issue 5 _journal_name_full 'Acta Crystallographica Section C' _journal_page_first 1300 _journal_page_last 1302 _journal_volume 52 _journal_year 1996 _chemical_formula_moiety 'C21 H27 N5 O5, 5H2 O' _chemical_formula_sum 'C21 H37 N5 O10' _chemical_formula_weight 519.56 _chemical_name_systematic Hippuryl-L-Histidyl-L-Leucine _space_group_IT_number 19 _symmetry_cell_setting orthorhombic _symmetry_space_group_name_Hall 'P 2ac 2ab' _symmetry_space_group_name_H-M 'P 21 21 21' _cell_angle_alpha 90.00 _cell_angle_beta 90.00 _cell_angle_gamma 90.00 _cell_formula_units_Z 4 _cell_length_a 10.055(2) _cell_length_b 14.974(4) _cell_length_c 17.825(5) _cell_measurement_reflns_used 25 _cell_measurement_temperature 293(2) _cell_measurement_theta_max 16.4 _cell_measurement_theta_min 8.7 _cell_volume 2683.8(12) _computing_cell_refinement 'TEXSAN (Molecular Structure Corporation, 1993)' _computing_data_collection 'DATCOL for CAD-4 (Enraf-Nonius, 1981)' _computing_data_reduction TEXSAN _computing_molecular_graphics 'ORTEPII (Johnson, 1971)' _computing_publication_material SHELXL93 _computing_structure_refinement 'SHELXL93 (Sheldrick, 1993)' _computing_structure_solution 'SHELXS86 (Sheldrick, 1985)' _diffrn_ambient_temperature 293(2) _diffrn_measurement_device 'Enraf-Nonius CAD4F diffractometer' _diffrn_measurement_method '\w/2\q scans' _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71069 _diffrn_reflns_av_R_equivalents 0.0359 _diffrn_reflns_av_sigmaI/netI 0.0931 _diffrn_reflns_limit_h_max 10 _diffrn_reflns_limit_h_min -10 _diffrn_reflns_limit_k_max 16 _diffrn_reflns_limit_k_min 0 _diffrn_reflns_limit_l_max 19 _diffrn_reflns_limit_l_min 0 _diffrn_reflns_number 4726 _diffrn_reflns_theta_max 22.43 _diffrn_reflns_theta_min 1.78 _diffrn_standards_decay_% 4 _diffrn_standards_interval_time 30 _diffrn_standards_number 3 _exptl_absorpt_coefficient_mu 0.102 _exptl_absorpt_correction_type none _exptl_crystal_colour colorless _exptl_crystal_density_diffrn 1.286 _exptl_crystal_density_meas 'not measured' _exptl_crystal_description platelet _exptl_crystal_F_000 1112 _exptl_crystal_size_max 0.4 _exptl_crystal_size_mid 0.3 _exptl_crystal_size_min 0.1 _refine_diff_density_max .189 _refine_diff_density_min -.202 _refine_ls_abs_structure_details 'Flack H D (1983)' _refine_ls_abs_structure_Flack -2.(3) _refine_ls_extinction_method none _refine_ls_goodness_of_fit_all 0.986 _refine_ls_goodness_of_fit_obs 0.986 _refine_ls_hydrogen_treatment noref _refine_ls_matrix_type full _refine_ls_number_parameters 325 _refine_ls_number_reflns 3463 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.004 _refine_ls_restrained_S_obs 0.986 _refine_ls_R_factor_all 0.1192 _refine_ls_R_factor_obs 0.0671 _refine_ls_shift/esd_max 0.019 _refine_ls_shift/esd_mean 0.003 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_scheme ; calc w = 1/[\s^2^(Fo^2^)+(0.1000P)^2^] with P=(Fo^2^+2Fc^2^)/3 ; _refine_ls_wR_factor_all 0.1885 _refine_ls_wR_factor_obs 0.1521 _reflns_number_observed 2418 _reflns_number_total 3467 _reflns_observed_criterion >2sigma(I) _[local]_cod_data_source_file bk1197.cif _[local]_cod_data_source_block Hip-L-His-L-Leu _cod_database_code 2004845 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, -y, z+1/2' '-x, y+1/2, -z+1/2' 'x+1/2, -y+1/2, -z' loop_ _atom_site_label _atom_site_occupancy _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_thermal_displace_type _atom_site_calc_flag _atom_site_refinement_flags _atom_site_type_symbol O' 1 0.2830(5) -0.0767(3) 0.0235(3) 0.0576(14) Uani d . O O" 1 0.4149(5) 0.0224(3) -0.0272(3) 0.071(2) Uani d . O C3' 1 0.3148(6) 0.0015(5) 0.0086(4) 0.042(2) Uani d . C C3A 1 0.2270(6) 0.0790(4) 0.0370(3) 0.038(2) Uani d . C H3A 1 0.1743(6) 0.1002(4) -0.0057(3) 0.045 Uiso calc R H C3B 1 0.3072(6) 0.1570(4) 0.0654(4) 0.044(2) Uani d . C H3B1 1 0.3691(6) 0.1744(4) 0.0263(4) 0.053 Uiso calc R H H3B2 1 0.3595(6) 0.1368(4) 0.1079(4) 0.053 Uiso calc R H C3G 1 0.2305(8) 0.2393(5) 0.0893(5) 0.066(2) Uani d . C H3G 1 0.1623(8) 0.2213(5) 0.1256(5) 0.079 Uiso calc R H C3D1 1 0.1635(12) 0.2823(7) 0.0238(7) 0.134(5) Uani d . C H3D1 1 0.2295(11) 0.3040(54) -0.0106(25) 0.201 Uiso calc R H H3D2 1 0.1100(74) 0.3313(41) 0.0409(8) 0.201 Uiso calc R H H3D3 1 0.1080(71) 0.2393(19) -0.0011(32) 0.201 Uiso calc R H C3D2 1 0.3228(10) 0.3059(6) 0.1268(6) 0.111(4) Uani d . C H3D4 1 0.3709(56) 0.2768(14) 0.1664(29) 0.167 Uiso calc R H H3D5 1 0.2716(13) 0.3542(26) 0.1472(37) 0.167 Uiso calc R H H3D6 1 0.3845(50) 0.3288(38) 0.0905(12) 0.167 Uiso calc R H N3 1 0.1344(5) 0.0489(3) 0.0942(3) 0.0358(13) Uani d . N O2 1 -0.0436(4) 0.0267(3) 0.0188(2) 0.0531(13) Uani d . O C2' 1 0.0085(6) 0.0260(4) 0.0804(3) 0.0323(15) Uani d . C C2A 1 -0.0646(6) -0.0113(4) 0.1501(3) 0.0344(15) Uani d . C H2A 1 -0.0455(6) 0.0281(4) 0.1927(3) 0.041 Uiso calc R H C2B 1 -0.0177(6) -0.1055(4) 0.1704(3) 0.038(2) Uani d . C H2B1 1 0.0743(6) -0.1021(4) 0.1865(3) 0.045 Uiso calc R H H2B2 1 -0.0696(6) -0.1263(4) 0.2128(3) 0.045 Uiso calc R H C2G 1 -0.0274(6) -0.1731(4) 0.1096(3) 0.0356(15) Uani d . C C2D 1 -0.1134(7) -0.2407(5) 0.0983(4) 0.052(2) Uani d . C H2D 1 -0.1852(7) -0.2549(5) 0.1289(4) 0.062 Uiso calc R H N2D 1 0.0617(5) -0.1775(3) 0.0509(3) 0.0436(14) Uani d . N C2E 1 0.0295(7) -0.2451(5) 0.0077(4) 0.051(2) Uani d . C H2E 1 0.0753(7) -0.2621(5) -0.0353(4) 0.061 Uiso calc R H N2E 1 -0.0776(6) -0.2852(4) 0.0342(3) 0.052(2) Uani d . N N2 1 -0.2067(5) -0.0074(3) 0.1351(2) 0.0348(12) Uani d . N H2 1 -0.2263 0.0011 0.0936 0.042 Uiso d . H O1 1 -0.2633(4) -0.0118(3) 0.2574(2) 0.0458(11) Uani d . O C1' 1 -0.2949(6) -0.0049(4) 0.1918(3) 0.0348(14) Uani d . C C1A 1 -0.4379(6) 0.0135(4) 0.1667(4) 0.046(2) Uani d . C H1A1 1 -0.4570(6) 0.0765(4) 0.1734(4) 0.055 Uiso calc R H H1A2 1 -0.4460(6) 0.0001(4) 0.1137(4) 0.055 Uiso calc R H N1 1 -0.5357(5) -0.0386(4) 0.2080(3) 0.0429(14) Uani d . N O11 1 -0.4565(5) -0.1673(3) 0.1613(3) 0.0596(14) Uani d . O C11 1 -0.5409(6) -0.1271(5) 0.1992(4) 0.045(2) Uani d . C C12 1 -0.6547(6) -0.1744(5) 0.2365(4) 0.047(2) Uani d . C C13 1 -0.7057(7) -0.1470(5) 0.3051(4) 0.058(2) Uani d . C H13 1 -0.6672(7) -0.0991(5) 0.3303(4) 0.070 Uiso calc R H C14 1 -0.8145(8) -0.1912(6) 0.3365(5) 0.069(2) Uani d . C H14 1 -0.8508(8) -0.1719(6) 0.3817(5) 0.083 Uiso calc R H C15 1 -0.8663(8) -0.2625(6) 0.3003(5) 0.072(2) Uani d . C H15 1 -0.9373(8) -0.2930(6) 0.3218(5) 0.087 Uiso calc R H C16 1 -0.8166(8) -0.2912(5) 0.2322(5) 0.070(2) Uani d . C H16 1 -0.8555(8) -0.3394(5) 0.2077(5) 0.083 Uiso calc R H C17 1 -0.7086(7) -0.2480(5) 0.2005(4) 0.054(2) Uani d . C H17 1 -0.6726(7) -0.2682(5) 0.1556(4) 0.065 Uiso calc R H HN1 1 -0.6075 -0.0060 0.2414 0.065 Uiso d . H HN3 1 0.1643 0.0444 0.1542 0.065 Uiso d . H HN2D 1 0.1468 -0.1351 0.0423 0.065 Uiso d . H HN2E 1 -0.1210 -0.3475 -0.0051 0.065 Uiso d . H OW1 1 -0.3909(5) -0.3427(4) 0.1749(4) 0.090(2) Uani d . O OW2 1 -0.0957(6) -0.0522(4) -0.1183(3) 0.088(2) Uani d . O OW3 1 0.2120(5) 0.0616(4) 0.2493(3) 0.072(2) Uani d . O OW4 1 -0.3265(6) -0.0666(4) -0.0074(3) 0.092(2) Uani d . O OW5 1 -0.0071(5) 0.0173(5) 0.3339(3) 0.093(2) Uani d . O H1W1 1 -0.4340 -0.2750 0.1660 0.111 Uiso d . H H2W1 1 -0.4700 -0.3977 0.1784 0.111 Uiso d . H H1W2 1 -0.0848 -0.0069 -0.1587 0.111 Uiso d . H H2W2 1 -0.0714 -0.0020 -0.0819 0.111 Uiso d . H H1W3 1 0.1396 0.0719 0.2762 0.111 Uiso d . H H2W3 1 0.2697 0.1132 0.2696 0.111 Uiso d . H H1W4 1 -0.3312 -0.0096 -0.0079 0.111 Uiso d . H H2W4 1 -0.2508 -0.1141 -0.0354 0.111 Uiso d . H H1W5 1 0.0379 -0.0114 0.3772 0.111 Uiso d . H H2W5 1 -0.1098 0.0144 0.3208 0.111 Uiso d . H loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 O' 0.043(3) 0.038(3) 0.091(4) -0.001(3) 0.023(3) -0.017(3) O" 0.065(3) 0.064(4) 0.084(4) -0.006(3) 0.043(3) -0.010(3) C3' 0.033(4) 0.044(5) 0.050(4) -0.011(4) 0.003(3) -0.005(4) C3A 0.034(4) 0.042(4) 0.037(4) -0.003(3) 0.008(3) -0.003(3) C3B 0.034(4) 0.042(4) 0.057(4) -0.005(3) 0.006(3) -0.004(3) C3G 0.062(5) 0.048(5) 0.088(6) -0.002(4) 0.026(5) -0.019(5) C3D1 0.141(10) 0.078(7) 0.182(12) 0.065(7) -0.070(10) -0.027(8) C3D2 0.137(9) 0.061(6) 0.135(9) -0.003(6) -0.009(8) -0.046(6) N3 0.025(3) 0.047(3) 0.036(3) -0.003(2) 0.000(3) -0.002(3) O2 0.037(3) 0.083(4) 0.039(3) -0.011(3) -0.002(2) -0.001(3) C2' 0.034(4) 0.034(4) 0.029(3) 0.006(3) -0.002(3) -0.007(3) C2A 0.027(3) 0.040(4) 0.036(3) 0.004(3) 0.001(3) -0.005(3) C2B 0.037(4) 0.042(4) 0.034(3) 0.003(3) -0.001(3) 0.007(3) C2G 0.034(4) 0.030(3) 0.043(4) 0.002(3) -0.004(3) 0.000(3) C2D 0.041(4) 0.045(4) 0.070(5) -0.008(4) 0.004(4) 0.007(4) N2D 0.039(3) 0.040(3) 0.052(3) -0.007(3) 0.005(3) -0.009(3) C2E 0.047(5) 0.050(4) 0.056(4) 0.001(4) 0.000(4) -0.012(4) N2E 0.046(4) 0.049(4) 0.060(4) 0.005(3) -0.012(3) -0.016(3) N2 0.026(3) 0.051(3) 0.028(3) -0.001(3) 0.002(2) 0.004(3) O1 0.038(3) 0.062(3) 0.037(3) -0.001(2) 0.001(2) 0.004(2) C1' 0.031(4) 0.032(3) 0.041(4) 0.004(3) 0.004(3) 0.004(3) C1A 0.040(4) 0.047(4) 0.051(4) 0.006(4) 0.005(3) 0.008(3) N1 0.028(3) 0.049(4) 0.052(3) 0.001(3) 0.013(3) -0.007(3) O11 0.046(3) 0.059(3) 0.074(3) 0.007(3) 0.018(3) -0.010(3) C11 0.024(4) 0.060(5) 0.053(4) 0.003(4) 0.001(3) -0.011(4) C12 0.033(4) 0.058(5) 0.049(4) 0.003(4) -0.001(3) 0.008(4) C13 0.057(5) 0.073(5) 0.045(4) -0.008(4) 0.003(4) 0.004(4) C14 0.072(6) 0.070(6) 0.066(5) 0.007(5) 0.027(5) 0.016(5) C15 0.065(6) 0.057(5) 0.095(7) -0.005(5) 0.033(6) 0.020(5) C16 0.051(5) 0.043(5) 0.115(8) -0.009(4) -0.010(5) 0.005(5) C17 0.045(5) 0.045(4) 0.072(5) 0.008(4) -0.003(4) 0.000(4) OW1 0.060(4) 0.069(4) 0.141(5) 0.012(3) -0.025(4) 0.008(4) OW2 0.129(5) 0.083(4) 0.052(3) 0.021(4) -0.023(3) -0.009(3) OW3 0.071(4) 0.087(4) 0.057(3) -0.016(3) -0.005(3) -0.016(3) OW4 0.082(4) 0.111(5) 0.083(4) -0.022(4) -0.012(3) 0.004(4) OW5 0.063(4) 0.146(6) 0.069(3) -0.011(4) -0.013(3) 0.023(4) loop_ _atom_type_symbol _atom_type_description _atom_type_scat_dispersion_real _atom_type_scat_dispersion_imag _atom_type_scat_source C C .0033 .0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' H H .0000 .0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' N N .0061 .0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' O O .0106 .0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle _geom_angle_publ_flag O" C3' O' 124.1(6) yes O" C3' C3A 116.5(6) yes O' C3' C3A 119.4(6) yes N3 C3A C3B 110.3(5) yes N3 C3A C3' 111.3(5) yes C3B C3A C3' 112.7(5) yes N3 C3A H3A 107.4(3) no C3B C3A H3A 107.4(4) no C3' C3A H3A 107.4(3) no C3A C3B C3G 116.9(6) yes C3A C3B H3B1 108.1(3) no C3G C3B H3B1 108.1(4) no C3A C3B H3B2 108.1(4) no C3G C3B H3B2 108.1(4) no H3B1 C3B H3B2 107.3 no C3D1 C3G C3B 111.1(7) yes C3D1 C3G C3D2 109.7(8) yes C3B C3G C3D2 110.3(7) yes C3D1 C3G H3G 108.6(6) no C3B C3G H3G 108.6(4) no C3D2 C3G H3G 108.6(5) no C3G C3D1 H3D1 109.5(6) no C3G C3D1 H3D2 109.5(5) no H3D1 C3D1 H3D2 109.5 no C3G C3D1 H3D3 109.5(5) no H3D1 C3D1 H3D3 109.5 no H3D2 C3D1 H3D3 109.5 no C3G C3D2 H3D4 109.5(5) no C3G C3D2 H3D5 109.5(5) no H3D4 C3D2 H3D5 109.5 no C3G C3D2 H3D6 109.5(5) no H3D4 C3D2 H3D6 109.5 no H3D5 C3D2 H3D6 109.5 no C2' N3 C3A 123.9(5) yes C2' N3 HN3 114.8(5) no C3A N3 HN3 121.4(4) no O2 C2' N3 125.0(6) yes O2 C2' C2A 121.5(5) yes N3 C2' C2A 113.2(5) yes N2 C2A C2B 112.5(5) yes N2 C2A C2' 107.7(5) yes C2B C2A C2' 112.1(5) yes N2 C2A H2A 108.2(3) no C2B C2A H2A 108.2(3) no C2' C2A H2A 108.2(3) no C2G C2B C2A 115.8(5) yes C2G C2B H2B1 108.3(3) no C2A C2B H2B1 108.3(3) no C2G C2B H2B2 108.3(3) no C2A C2B H2B2 108.3(3) no H2B1 C2B H2B2 107.4 no C2D C2G N2D 105.6(5) yes C2D C2G C2B 131.5(6) yes N2D C2G C2B 122.9(5) yes C2G C2D N2E 108.8(6) yes C2G C2D H2D 125.6(4) no N2E C2D H2D 125.6(4) no C2E N2D C2G 108.7(5) yes C2E N2D HN2D 124.6(6) no C2G N2D HN2D 126.6(5) no N2D C2E N2E 110.0(6) yes N2D C2E H2E 125.0(4) no N2E C2E H2E 125.0(4) no C2E N2E C2D 106.9(6) yes C2E N2E HN2E 115.2(6) no C2D N2E HN2E 137.8(6) no C1' N2 C2A 120.7(5) yes C1' N2 H2 122.9(5) no C2A N2 H2 115.6(5) no O1 C1' N2 123.1(5) yes O1 C1' C1A 122.8(5) yes N2 C1' C1A 113.9(5) yes N1 C1A C1' 113.0(5) yes N1 C1A H1A1 109.0(3) no C1' C1A H1A1 109.0(4) no N1 C1A H1A2 109.0(3) no C1' C1A H1A2 109.0(3) no H1A1 C1A H1A2 107.8 no C11 N1 C1A 120.0(5) yes C11 N1 HN1 119.8(5) no C1A N1 HN1 120.0(5) no O11 C11 N1 121.3(6) yes O11 C11 C12 122.2(6) yes N1 C11 C12 116.5(6) yes C17 C12 C13 119.9(7) no C17 C12 C11 118.0(6) no C13 C12 C11 122.1(7) no C12 C13 C14 120.1(7) no C12 C13 H13 119.9(4) no C14 C13 H13 119.9(5) no C15 C14 C13 119.0(8) no C15 C14 H14 120.5(5) no C13 C14 H14 120.5(5) no C14 C15 C16 121.7(8) no C14 C15 H15 119.1(5) no C16 C15 H15 119.1(5) no C15 C16 C17 119.8(8) no C15 C16 H16 120.1(5) no C17 C16 H16 120.1(5) no C12 C17 C16 119.4(7) no C12 C17 H17 120.3(4) no C16 C17 H17 120.3(5) no H1W1 OW1 H2W1 113.0(4) no H1W2 OW2 H2W2 86.1(5) no H1W3 OW3 H2W3 98.1(4) no H1W4 OW4 H2W4 130.4(6) no H1W5 OW5 H2W5 126.7(6) no loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_publ_flag O' C3' 1.242(7) yes O" C3' 1.232(7) yes C3' C3A 1.543(9) yes C3A N3 1.453(7) yes C3A C3B 1.508(8) yes C3A H3A 0.98 no C3B C3G 1.515(9) yes C3B H3B1 0.97 no C3B H3B2 0.97 no C3G C3D1 1.494(12) yes C3G C3D2 1.518(11) yes C3G H3G 0.98 no C3D1 H3D1 0.96 no C3D1 H3D2 0.96 no C3D1 H3D3 0.96 no C3D2 H3D4 0.96 no C3D2 H3D5 0.96 no C3D2 H3D6 0.96 no N3 C2' 1.335(7) yes N3 HN3 1.112(5) no O2 C2' 1.217(7) yes C2' C2A 1.549(8) yes C2A N2 1.454(7) yes C2A C2B 1.531(8) yes C2A H2A 0.98 no C2B C2G 1.487(8) yes C2B H2B1 0.97 no C2B H2B2 0.97 no C2G C2D 1.346(8) yes C2G N2D 1.380(7) yes C2D N2E 1.371(9) yes C2D H2D 0.93 no N2D C2E 1.312(8) yes N2D HN2D 1.076(5) no C2E N2E 1.321(9) yes C2E H2E 0.93 no N2E HN2E 1.245(5) no N2 C1' 1.345(7) yes N2 H2 0.776(4) no O1 C1' 1.217(7) yes C1' C1A 1.531(8) yes C1A N1 1.454(7) yes C1A H1A1 0.97 no C1A H1A2 0.97 no N1 C11 1.335(8) yes N1 HN1 1.056(5) no O11 C11 1.241(7) yes C11 C12 1.502(9) yes C12 C17 1.384(9) no C12 C13 1.389(9) no C13 C14 1.395(10) no C13 H13 0.93 no C14 C15 1.352(11) no C14 H14 0.93 no C15 C16 1.381(11) no C15 H15 0.93 no C16 C17 1.384(10) no C16 H16 0.93 no C17 H17 0.93 no OW1 H1W1 1.114(5) no OW1 H2W1 1.147(6) no OW2 H1W2 0.996(5) no OW2 H2W2 1.022(5) no OW3 H1W3 0.886(5) no OW3 H2W3 1.032(5) no OW4 H1W4 0.854(7) no OW4 H2W4 1.155(6) no OW5 H1W5 0.993(5) no OW5 H2W5 1.060(5) no