data_3L75 # _model_server_result.job_id FIhSFZaK3m0Mu_i-6HJDbA _model_server_result.datetime_utc '2024-11-05 10:36:44' _model_server_result.server_version 0.9.12 _model_server_result.query_name ligand _model_server_result.source_id pdb-bcif _model_server_result.entry_id 3l75 # _model_server_params.name atom_site _model_server_params.value '{"label_asym_id":"U","auth_seq_id":2008}' # _entry.id 3L75 # _exptl.entry_id 3L75 _exptl.method 'X-RAY DIFFRACTION' # _entity.details ? _entity.formula_weight 744.034 _entity.id 11 _entity.src_method syn _entity.type non-polymer _entity.pdbx_description 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine _entity.pdbx_number_of_molecules 6 _entity.pdbx_parent_entity_id . _entity.pdbx_mutation ? _entity.pdbx_fragment ? _entity.pdbx_ec ? # _cell.angle_alpha 90 _cell.angle_beta 90 _cell.angle_gamma 90 _cell.entry_id 3L75 _cell.length_a 172.285 _cell.length_b 182.141 _cell.length_c 241.198 _cell.Z_PDB 8 _cell.pdbx_unique_axis ? # _symmetry.entry_id 3L75 _symmetry.cell_setting ? _symmetry.Int_Tables_number 19 _symmetry.space_group_name_Hall ? _symmetry.space_group_name_H-M 'P 21 21 21' # _pdbx_struct_assembly.method_details ? _pdbx_struct_assembly.oligomeric_details eicosameric _pdbx_struct_assembly.oligomeric_count 20 _pdbx_struct_assembly.details author_defined_assembly _pdbx_struct_assembly.id 1 # _pdbx_struct_assembly_gen.asym_id_list A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,AA,BA,CA,DA,EA,FA,GA,HA,IA,JA,KA,LA,MA,NA,OA,PA,QA,RA,SA,TA,UA,VA,WA,XA,YA,ZA,AB,BB,CB,DB,EB,FB,GB,HB,IB,JB,KB,LB,MB,NB _pdbx_struct_assembly_gen.assembly_id 1 _pdbx_struct_assembly_gen.oper_expression 1 # _pdbx_struct_oper_list.id 1 _pdbx_struct_oper_list.type 'identity operation' _pdbx_struct_oper_list.name 1_555 _pdbx_struct_oper_list.symmetry_operation x,y,z _pdbx_struct_oper_list.matrix[1][1] 1 _pdbx_struct_oper_list.matrix[1][2] 0 _pdbx_struct_oper_list.matrix[1][3] 0 _pdbx_struct_oper_list.matrix[2][1] 0 _pdbx_struct_oper_list.matrix[2][2] 1 _pdbx_struct_oper_list.matrix[2][3] 0 _pdbx_struct_oper_list.matrix[3][1] 0 _pdbx_struct_oper_list.matrix[3][2] 0 _pdbx_struct_oper_list.matrix[3][3] 1 _pdbx_struct_oper_list.vector[1] 0 _pdbx_struct_oper_list.vector[2] 0 _pdbx_struct_oper_list.vector[3] 0 # loop_ _struct_asym.details _struct_asym.entity_id _struct_asym.id _struct_asym.pdbx_modified _struct_asym.pdbx_blank_PDB_chainid_flag ? 11 U N N ? 11 AA N N ? 11 BA N N ? 11 OA N N ? 11 UA N N ? 11 VA N N # loop_ _struct_conn.conn_type_id _struct_conn.details _struct_conn.id _struct_conn.ptnr1_label_asym_id _struct_conn.ptnr1_label_atom_id _struct_conn.ptnr1_label_comp_id _struct_conn.ptnr1_label_seq_id _struct_conn.ptnr1_auth_asym_id _struct_conn.ptnr1_auth_comp_id _struct_conn.ptnr1_auth_seq_id _struct_conn.ptnr1_symmetry _struct_conn.ptnr2_label_asym_id _struct_conn.ptnr2_label_atom_id _struct_conn.ptnr2_label_comp_id _struct_conn.ptnr2_label_seq_id _struct_conn.ptnr2_auth_asym_id _struct_conn.ptnr2_auth_comp_id _struct_conn.ptnr2_auth_seq_id _struct_conn.ptnr2_symmetry _struct_conn.pdbx_ptnr1_PDB_ins_code _struct_conn.pdbx_ptnr1_label_alt_id _struct_conn.pdbx_ptnr1_standard_comp_id _struct_conn.pdbx_ptnr2_PDB_ins_code _struct_conn.pdbx_ptnr2_label_alt_id _struct_conn.pdbx_ptnr3_PDB_ins_code _struct_conn.pdbx_ptnr3_label_alt_id _struct_conn.pdbx_ptnr3_label_asym_id _struct_conn.pdbx_ptnr3_label_atom_id _struct_conn.pdbx_ptnr3_label_comp_id _struct_conn.pdbx_ptnr3_label_seq_id _struct_conn.pdbx_PDB_id _struct_conn.pdbx_dist_value _struct_conn.pdbx_value_order disulf ? disulf1 E SG CYS 144 E CYS 144 1_555 E SG CYS 160 E CYS 160 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.028 ? disulf ? disulf2 H SG CYS 23 H CYS 24 1_555 H SG CYS 67 H CYS 68 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.055 ? disulf ? disulf3 H SG CYS 39 H CYS 40 1_555 H SG CYS 53 H CYS 54 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.06 ? disulf ? disulf4 O SG CYS 144 R CYS 144 1_555 O SG CYS 160 R CYS 160 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.025 ? disulf ? disulf5 R SG CYS 23 U CYS 24 1_555 R SG CYS 67 U CYS 68 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.041 ? disulf ? disulf6 R SG CYS 39 U CYS 40 1_555 R SG CYS 53 U CYS 54 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.041 ? metalc ? metalc1 C NE2 HIS 84 C HIS 84 1_555 W FE HEM . C HEM 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.008 ? metalc ? metalc2 C NE2 HIS 98 C HIS 98 1_555 X FE HEM . C HEM 502 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.015 ? metalc ? metalc3 C NE2 HIS 183 C HIS 183 1_555 W FE HEM . C HEM 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.001 ? metalc ? metalc4 C NE2 HIS 197 C HIS 197 1_555 X FE HEM . C HEM 502 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.004 ? metalc ? metalc5 D NE2 HIS 41 D HIS 41 1_555 HA FE HEC . D HEC 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 1.999 ? metalc ? metalc6 D SD MET 160 D MET 160 1_555 HA FE HEC . D HEC 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.183 ? metalc ? metalc7 E SG CYS 139 E CYS 139 1_555 MA FE1 FES . E FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.246 ? metalc ? metalc8 E ND1 HIS 141 E HIS 141 1_555 MA FE2 FES . E FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.148 ? metalc ? metalc9 E SG CYS 158 E CYS 158 1_555 MA FE1 FES . E FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.255 ? metalc ? metalc10 E ND1 HIS 161 E HIS 161 1_555 MA FE2 FES . E FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.148 ? metalc ? metalc11 M NE2 HIS 84 P HIS 84 1_555 PA FE HEM . P HEM 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.002 ? metalc ? metalc12 M NE2 HIS 98 P HIS 98 1_555 QA FE HEM . P HEM 502 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.006 ? metalc ? metalc13 M NE2 HIS 183 P HIS 183 1_555 PA FE HEM . P HEM 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.004 ? metalc ? metalc14 M NE2 HIS 197 P HIS 197 1_555 QA FE HEM . P HEM 502 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.014 ? metalc ? metalc15 N NE2 HIS 41 Q HIS 41 1_555 CB FE HEC . Q HEC 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2 ? metalc ? metalc16 N SD MET 160 Q MET 160 1_555 CB FE HEC . Q HEC 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.201 ? metalc ? metalc17 O SG CYS 139 R CYS 139 1_555 GB FE1 FES . R FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.269 ? metalc ? metalc18 O ND1 HIS 141 R HIS 141 1_555 GB FE2 FES . R FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.161 ? metalc ? metalc19 O SG CYS 158 R CYS 158 1_555 GB FE1 FES . R FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.249 ? metalc ? metalc20 O ND1 HIS 161 R HIS 161 1_555 GB FE2 FES . R FES 501 1_555 ? ? ? ? ? ? ? ? ? ? ? ? 2.165 ? # _chem_comp.formula 'C41 H78 N O8 P' _chem_comp.formula_weight 744.034 _chem_comp.id PEE _chem_comp.mon_nstd_flag n _chem_comp.name 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine _chem_comp.type non-polymer _chem_comp.pdbx_synonyms DOPE # loop_ _chem_comp_bond.atom_id_1 _chem_comp_bond.atom_id_2 _chem_comp_bond.comp_id _chem_comp_bond.value_order _chem_comp_bond.pdbx_ordinal _chem_comp_bond.pdbx_stereo_config _chem_comp_bond.pdbx_aromatic_flag N C5 PEE sing 753 n n C5 C4 PEE sing 754 n n C4 O4P PEE sing 755 n n O4P P PEE sing 756 n n O1P P PEE doub 757 n n C1 O3P PEE sing 758 n n C1 C2 PEE sing 759 n n O3P P PEE sing 760 n n P O2P PEE sing 761 n n C2 C3 PEE sing 762 n n C2 O2 PEE sing 763 n n C3 O3 PEE sing 764 n n O2 C10 PEE sing 765 n n C31 C30 PEE sing 766 n n C31 C32 PEE sing 767 n n C33 C32 PEE sing 768 n n C33 C34 PEE sing 769 n n C30 O3 PEE sing 770 n n C30 O5 PEE doub 771 n n C10 O4 PEE doub 772 n n C10 C11 PEE sing 773 n n C34 C35 PEE sing 774 n n C11 C12 PEE sing 775 n n C35 C36 PEE sing 776 n n C36 C37 PEE sing 777 n n C37 C38 PEE sing 778 n n C38 C39 PEE doub 779 z n C12 C13 PEE sing 780 n n C39 C40 PEE sing 781 n n C13 C14 PEE sing 782 n n C14 C15 PEE sing 783 n n C40 C41 PEE sing 784 n n C15 C16 PEE sing 785 n n C41 C42 PEE sing 786 n n C16 C17 PEE sing 787 n n C42 C43 PEE sing 788 n n C17 C18 PEE sing 789 n n C43 C44 PEE sing 790 n n C18 C19 PEE doub 791 z n C46 C47 PEE sing 792 n n C46 C45 PEE sing 793 n n C44 C45 PEE sing 794 n n C19 C20 PEE sing 795 n n C20 C21 PEE sing 796 n n C21 C22 PEE sing 797 n n C22 C23 PEE sing 798 n n C23 C24 PEE sing 799 n n C24 C25 PEE sing 800 n n C26 C25 PEE sing 801 n n C26 C27 PEE sing 802 n n C27 H7 PEE sing 803 n n C27 H8 PEE sing 804 n n C27 H82 PEE sing 805 n n C26 H5 PEE sing 806 n n C26 H6 PEE sing 807 n n C25 H12 PEE sing 808 n n C25 H4 PEE sing 809 n n C24 H10 PEE sing 810 n n C24 H11 PEE sing 811 n n C23 H83 PEE sing 812 n n C23 H9 PEE sing 813 n n C22 H2 PEE sing 814 n n C22 H3 PEE sing 815 n n C21 H14 PEE sing 816 n n C21 H1 PEE sing 817 n n C20 H16 PEE sing 818 n n C20 H13 PEE sing 819 n n C19 H18 PEE sing 820 n n C18 H20 PEE sing 821 n n C17 H22 PEE sing 822 n n C17 H19 PEE sing 823 n n C16 H21 PEE sing 824 n n C16 H28 PEE sing 825 n n C15 H23 PEE sing 826 n n C15 H24 PEE sing 827 n n C14 H25 PEE sing 828 n n C14 H26 PEE sing 829 n n C13 H17 PEE sing 830 n n C13 H27 PEE sing 831 n n C12 H15 PEE sing 832 n n C12 H29 PEE sing 833 n n C11 H30 PEE sing 834 n n C11 H31 PEE sing 835 n n C2 H32 PEE sing 836 n n C1 H33 PEE sing 837 n n C1 H34 PEE sing 838 n n O2P H35 PEE sing 839 n n C4 H36 PEE sing 840 n n C4 H37 PEE sing 841 n n C5 H38 PEE sing 842 n n C5 H39 PEE sing 843 n n N H40 PEE sing 844 n n N H41 PEE sing 845 n n C3 H43 PEE sing 846 n n C3 H44 PEE sing 847 n n C31 H45 PEE sing 848 n n C31 H46 PEE sing 849 n n C32 H47 PEE sing 850 n n C32 H48 PEE sing 851 n n C33 H49 PEE sing 852 n n C33 H50 PEE sing 853 n n C34 H51 PEE sing 854 n n C34 H52 PEE sing 855 n n C35 H53 PEE sing 856 n n C35 H54 PEE sing 857 n n C36 H55 PEE sing 858 n n C36 H56 PEE sing 859 n n C37 H57 PEE sing 860 n n C37 H58 PEE sing 861 n n C38 H59 PEE sing 862 n n C39 H60 PEE sing 863 n n C40 H81 PEE sing 864 n n C40 H61 PEE sing 865 n n C41 H80 PEE sing 866 n n C41 H62 PEE sing 867 n n C42 H63 PEE sing 868 n n C42 H64 PEE sing 869 n n C43 H65 PEE sing 870 n n C43 H66 PEE sing 871 n n C44 H67 PEE sing 872 n n C44 H68 PEE sing 873 n n C45 H69 PEE sing 874 n n C45 H70 PEE sing 875 n n C46 H71 PEE sing 876 n n C46 H72 PEE sing 877 n n C47 H73 PEE sing 878 n n C47 H74 PEE sing 879 n n C47 H75 PEE sing 880 n n # _atom_sites.entry_id 3L75 _atom_sites.fract_transf_matrix[1][1] 0.005804 _atom_sites.fract_transf_matrix[1][2] 0 _atom_sites.fract_transf_matrix[1][3] 0 _atom_sites.fract_transf_matrix[2][1] 0 _atom_sites.fract_transf_matrix[2][2] 0.00549 _atom_sites.fract_transf_matrix[2][3] 0 _atom_sites.fract_transf_matrix[3][1] 0 _atom_sites.fract_transf_matrix[3][2] 0 _atom_sites.fract_transf_matrix[3][3] 0.004146 _atom_sites.fract_transf_vector[1] 0 _atom_sites.fract_transf_vector[2] 0 _atom_sites.fract_transf_vector[3] 0 # loop_ _pdbx_nonpoly_scheme.asym_id _pdbx_nonpoly_scheme.entity_id _pdbx_nonpoly_scheme.mon_id _pdbx_nonpoly_scheme.pdb_strand_id _pdbx_nonpoly_scheme.ndb_seq_num _pdbx_nonpoly_scheme.pdb_seq_num _pdbx_nonpoly_scheme.auth_seq_num _pdbx_nonpoly_scheme.pdb_mon_id _pdbx_nonpoly_scheme.auth_mon_id _pdbx_nonpoly_scheme.pdb_ins_code U 11 PEE A 1 2008 2008 PEE PEE . V 12 UNL A 1 3015 3015 UNL UNL . W 13 HEM C 1 501 501 HEM HEM . X 13 HEM C 1 502 502 HEM HEM . Y 14 FNM C 1 2001 2001 FNM FNM . Z 15 UQ C 1 2002 2002 UQ UQ . AA 11 PEE C 1 2005 2005 PEE PEE . BA 11 PEE C 1 2007 2007 PEE PEE . CA 16 AZI C 1 2011 2011 AZI AZI . DA 12 UNL C 1 2047 2047 UNL UNL . EA 12 UNL C 1 2046 2046 UNL UNL . FA 12 UNL C 1 2048 2048 UNL UNL . GA 17 BOG C 1 3010 3010 BOG BOG . HA 18 HEC D 1 501 501 HEC HEC . IA 19 CDL D 1 2003 2003 CDL CDL . JA 17 BOG D 1 2009 2009 BOG BOG . KA 17 BOG D 1 2091 2091 BOG BOG . LA 12 UNL D 1 2012 2012 UNL UNL . MA 20 FES E 1 501 501 FES FES . NA 19 CDL G 1 2004 2004 CDL CDL . OA 11 PEE N 1 3008 3008 PEE PEE . PA 13 HEM P 1 501 501 HEM HEM . QA 13 HEM P 1 502 502 HEM HEM . RA 17 BOG P 1 2010 2010 BOG BOG . SA 14 FNM P 1 3001 3001 FNM FNM . TA 15 UQ P 1 3002 3002 UQ UQ . UA 11 PEE P 1 3005 3005 PEE PEE . VA 11 PEE P 1 3007 3007 PEE PEE . WA 16 AZI P 1 3011 3011 AZI AZI . XA 12 UNL P 1 3013 3013 UNL UNL . YA 12 UNL P 1 3014 3014 UNL UNL . ZA 12 UNL P 1 3047 3047 UNL UNL . AB 12 UNL P 1 3046 3046 UNL UNL . BB 12 UNL P 1 3048 3048 UNL UNL . CB 18 HEC Q 1 501 501 HEC HEC . DB 19 CDL Q 1 3003 3003 CDL CDL . EB 17 BOG Q 1 3009 3009 BOG BOG . FB 17 BOG Q 1 3091 3091 BOG BOG . GB 20 FES R 1 501 501 FES FES . HB 12 UNL R 1 3012 3012 UNL UNL . IB 19 CDL T 1 3004 3004 CDL CDL . JB 21 HOH A 1 1231 1231 HOH HOH . JB 21 HOH A 2 1284 1284 HOH HOH . KB 21 HOH C 1 381 2 HOH HOH . KB 21 HOH C 2 382 45 HOH HOH . KB 21 HOH C 3 383 47 HOH HOH . KB 21 HOH C 4 384 108 HOH HOH . KB 21 HOH C 5 385 119 HOH HOH . KB 21 HOH C 6 386 168 HOH HOH . KB 21 HOH C 7 387 222 HOH HOH . KB 21 HOH C 8 1008 1008 HOH HOH . KB 21 HOH C 9 1288 1288 HOH HOH . LB 21 HOH E 1 197 5 HOH HOH . LB 21 HOH E 2 198 6 HOH HOH . LB 21 HOH E 3 1289 1289 HOH HOH . MB 21 HOH P 1 381 1 HOH HOH . MB 21 HOH P 2 382 28 HOH HOH . MB 21 HOH P 3 383 35 HOH HOH . MB 21 HOH P 4 384 55 HOH HOH . MB 21 HOH P 5 385 57 HOH HOH . MB 21 HOH P 6 386 109 HOH HOH . MB 21 HOH P 7 387 214 HOH HOH . MB 21 HOH P 8 959 959 HOH HOH . MB 21 HOH P 9 1285 1285 HOH HOH . MB 21 HOH P 10 1286 1286 HOH HOH . NB 21 HOH R 1 197 3 HOH HOH . NB 21 HOH R 2 198 4 HOH HOH . NB 21 HOH R 3 1230 1230 HOH HOH . NB 21 HOH R 4 1287 1287 HOH HOH . # loop_ _atom_site.group_PDB _atom_site.id _atom_site.type_symbol _atom_site.label_atom_id _atom_site.label_comp_id _atom_site.label_seq_id _atom_site.label_alt_id _atom_site.pdbx_PDB_ins_code _atom_site.label_asym_id _atom_site.label_entity_id _atom_site.Cartn_x _atom_site.Cartn_y _atom_site.Cartn_z _atom_site.occupancy _atom_site.B_iso_or_equiv _atom_site.pdbx_formal_charge _atom_site.auth_atom_id _atom_site.auth_comp_id _atom_site.auth_seq_id _atom_site.auth_asym_id _atom_site.pdbx_PDB_model_num HETATM 1 C C13 PEE . . . U 11 36.684 114.784 60.489 1 114.76 ? C13 PEE 2008 A 1 HETATM 2 C C12 PEE . . . U 11 37.904 115.165 61.345 1 114.37 ? C12 PEE 2008 A 1 HETATM 3 C C11 PEE . . . U 11 39.118 114.262 61.027 1 114.63 ? C11 PEE 2008 A 1 HETATM 4 C C10 PEE . . . U 11 40.406 114.623 61.814 1 114.55 ? C10 PEE 2008 A 1 HETATM 5 O O4 PEE . . . U 11 40.478 114.465 63.053 1 114.89 ? O4 PEE 2008 A 1 HETATM 6 O O2 PEE . . . U 11 41.453 115.134 60.991 1 113.67 ? O2 PEE 2008 A 1 HETATM 7 C C2 PEE . . . U 11 42.85 114.689 61.282 1 111.57 ? C2 PEE 2008 A 1 HETATM 8 C C1 PEE . . . U 11 43.298 113.563 60.296 1 107.82 ? C1 PEE 2008 A 1 HETATM 9 O O3P PEE . . . U 11 43.596 112.279 60.937 1 103.52 ? O3P PEE 2008 A 1 HETATM 10 P P PEE . . . U 11 43.41 110.859 60.145 1 101.61 ? P PEE 2008 A 1 HETATM 11 O O2P PEE . . . U 11 43.724 111.08 58.579 1 102.32 ? O2P PEE 2008 A 1 HETATM 12 O O1P PEE . . . U 11 41.882 110.369 60.293 1 102.04 ? O1P PEE 2008 A 1 HETATM 13 O O4P PEE . . . U 11 44.414 109.708 60.772 1 100.03 ? O4P PEE 2008 A 1 HETATM 14 C C4 PEE . . . U 11 45.883 109.822 60.822 1 98.28 ? C4 PEE 2008 A 1 HETATM 15 C C5 PEE . . . U 11 46.642 108.504 60.548 1 95.69 ? C5 PEE 2008 A 1 HETATM 16 C C3 PEE . . . U 11 43.842 115.901 61.33 1 113.25 ? C3 PEE 2008 A 1 HETATM 17 O O3 PEE . . . U 11 45.186 115.549 61.833 1 116.37 ? O3 PEE 2008 A 1 HETATM 18 C C30 PEE . . . U 11 45.359 115.628 63.244 1 117.27 ? C30 PEE 2008 A 1 HETATM 19 O O5 PEE . . . U 11 44.865 116.523 63.967 1 118.21 ? O5 PEE 2008 A 1 HETATM 20 C C31 PEE . . . U 11 46.243 114.476 63.827 1 116.96 ? C31 PEE 2008 A 1 HETATM 21 C C32 PEE . . . U 11 47.678 114.895 64.24 1 115.44 ? C32 PEE 2008 A 1 # _model_server_stats.io_time_ms 20 _model_server_stats.parse_time_ms 11 _model_server_stats.create_model_time_ms 56 _model_server_stats.query_time_ms 298 _model_server_stats.encode_time_ms 12 _model_server_stats.element_count 21 #