data_PLC # _chem_comp.id PLC _chem_comp.name "DIUNDECYL PHOSPHATIDYL CHOLINE" _chem_comp.type NON-POLYMER _chem_comp.pdbx_type HETAIN _chem_comp.formula "C32 H65 N O8 P" _chem_comp.mon_nstd_parent_comp_id ? _chem_comp.pdbx_synonyms ? _chem_comp.pdbx_formal_charge 1 _chem_comp.pdbx_initial_date 1999-07-08 _chem_comp.pdbx_modified_date 2011-06-04 _chem_comp.pdbx_ambiguous_flag N _chem_comp.pdbx_release_status REL _chem_comp.pdbx_replaced_by ? _chem_comp.pdbx_replaces ? _chem_comp.formula_weight 622.834 _chem_comp.one_letter_code ? _chem_comp.three_letter_code PLC _chem_comp.pdbx_model_coordinates_details ? _chem_comp.pdbx_model_coordinates_missing_flag N _chem_comp.pdbx_ideal_coordinates_details ? _chem_comp.pdbx_ideal_coordinates_missing_flag N _chem_comp.pdbx_model_coordinates_db_code 1EIN _chem_comp.pdbx_subcomponent_list ? _chem_comp.pdbx_processing_site RCSB # loop_ _chem_comp_atom.comp_id _chem_comp_atom.atom_id _chem_comp_atom.alt_atom_id _chem_comp_atom.type_symbol _chem_comp_atom.charge _chem_comp_atom.pdbx_align _chem_comp_atom.pdbx_aromatic_flag _chem_comp_atom.pdbx_leaving_atom_flag _chem_comp_atom.pdbx_stereo_config _chem_comp_atom.model_Cartn_x _chem_comp_atom.model_Cartn_y _chem_comp_atom.model_Cartn_z _chem_comp_atom.pdbx_model_Cartn_x_ideal _chem_comp_atom.pdbx_model_Cartn_y_ideal _chem_comp_atom.pdbx_model_Cartn_z_ideal _chem_comp_atom.pdbx_component_atom_id _chem_comp_atom.pdbx_component_comp_id _chem_comp_atom.pdbx_ordinal PLC C1 C1 C 0 1 N N N -1.513 85.118 6.174 -2.770 1.955 -0.961 C1 PLC 1 PLC C2 C2 C 0 1 N N R -1.314 86.007 4.949 -1.545 2.816 -1.278 C2 PLC 2 PLC C3 C3 C 0 1 N N N 0.167 86.041 4.551 -0.939 3.341 0.024 C3 PLC 3 PLC C4 C4 C 0 1 N N N -0.891 80.284 7.327 -4.552 -1.986 1.302 C4 PLC 4 PLC C5 C5 C 0 1 N N N 0.094 79.512 6.400 -4.269 -3.207 2.180 C5 PLC 5 PLC C6 C6 C 0 1 N N N 0.696 77.194 6.099 -3.469 -2.301 4.926 C6 PLC 6 PLC C7 C7 C 0 1 N N N -1.017 77.875 7.728 -4.544 -3.955 4.146 C7 PLC 7 PLC C8 C8 C 0 1 N N N 1.189 78.355 8.198 -2.424 -2.826 3.156 C8 PLC 8 PLC "C'" "C'" C 0 1 N N N -3.446 85.473 4.177 -0.582 1.949 -3.323 "C'" PLC 9 PLC "C1'" "C1'" C 0 1 N N N -4.302 84.722 3.146 0.440 1.117 -4.053 "C1'" PLC 10 PLC "C2'" "C2'" C 0 1 N N N -5.234 85.735 2.484 0.194 1.213 -5.560 "C2'" PLC 11 PLC "C3'" "C3'" C 0 1 N N N -5.182 85.674 0.948 1.233 0.369 -6.301 "C3'" PLC 12 PLC "C4'" "C4'" C 0 1 N N N -4.263 84.531 0.449 0.986 0.466 -7.808 "C4'" PLC 13 PLC "C5'" "C5'" C 0 1 N N N -4.301 84.449 -1.072 2.025 -0.378 -8.550 "C5'" PLC 14 PLC "C6'" "C6'" C 0 1 N N N -4.874 83.156 -1.637 1.778 -0.281 -10.057 "C6'" PLC 15 PLC "C7'" "C7'" C 0 1 N N N -3.762 82.448 -2.444 2.817 -1.126 -10.798 "C7'" PLC 16 PLC "C8'" "C8'" C 0 1 N N N -3.383 81.156 -1.691 2.571 -1.029 -12.305 "C8'" PLC 17 PLC "C9'" "C9'" C 0 1 N N N -2.308 80.307 -2.372 3.609 -1.874 -13.047 "C9'" PLC 18 PLC "CA'" "'C10" C 0 1 N N N -1.741 79.276 -1.391 3.363 -1.777 -14.554 "CA'" PLC 19 PLC "CB'" "'C11" C 0 1 N N N -0.385 78.722 -1.850 4.401 -2.622 -15.295 "CB'" PLC 20 PLC CB 'C"' C 0 1 N N N 1.399 87.272 2.966 0.018 2.444 2.057 CB PLC 21 PLC C1B 'C1"' C 0 1 N N N 2.564 86.880 3.911 0.432 1.282 2.923 C1B PLC 22 PLC C2B 'C2"' C 0 1 N N N 3.554 88.051 3.840 1.038 1.807 4.226 C2B PLC 23 PLC C3B 'C3"' C 0 1 N N N 5.033 87.703 3.788 1.458 0.628 5.105 C3B PLC 24 PLC C4B 'C4"' C 0 1 N N N 5.714 87.650 5.152 2.064 1.153 6.408 C4B PLC 25 PLC C5B 'C5"' C 0 1 N N N 6.174 86.247 5.521 2.484 -0.026 7.288 C5B PLC 26 PLC C6B 'C6"' C 0 1 N N N 6.396 85.926 6.995 3.090 0.498 8.590 C6B PLC 27 PLC C7B 'C7"' C 0 1 N N N 6.270 84.413 7.233 3.510 -0.680 9.470 C7B PLC 28 PLC C8B 'C8"' C 0 1 N N N 4.841 83.841 7.274 4.116 -0.155 10.773 C8B PLC 29 PLC C9B 'C9"' C 0 1 N N N 4.474 83.387 8.691 4.536 -1.335 11.652 C9B PLC 30 PLC CAA '"C10' C 0 1 N N N 3.013 82.983 8.904 5.142 -0.810 12.955 CAA PLC 31 PLC CBA '"C11' C 0 1 N N N 2.615 82.992 10.401 5.562 -1.989 13.834 CBA PLC 32 PLC "O'" "O'" O 0 1 N N N -3.907 85.775 5.248 -1.421 2.556 -3.944 "O'" PLC 33 PLC OB 'O"' O 0 1 N N N 1.580 88.284 2.291 0.191 3.576 2.443 OB PLC 34 PLC O2 O2 O 0 1 N N N -2.158 85.621 3.856 -0.560 2.015 -1.982 O2 PLC 35 PLC O3 O3 O 0 1 N N N 0.241 86.733 3.309 -0.541 2.221 0.858 O3 PLC 36 PLC O1P O1P O 0 1 N N N -2.534 83.382 7.773 -4.280 -0.480 -1.125 O1P PLC 37 PLC O2P O2P O 0 1 N N N -0.014 82.734 8.178 -4.785 0.919 0.913 O2P PLC 38 PLC O3P O3P O 0 1 N N N -0.858 83.853 5.958 -2.377 0.853 -0.140 O3P PLC 39 PLC O4P O4P O 0 1 N N N -1.321 81.407 6.591 -3.337 -1.268 1.078 O4P PLC 40 PLC N N N 1 1 N N N 0.261 78.192 7.070 -3.869 -2.754 3.553 N PLC 41 PLC P P P 0 1 N N R -1.254 82.862 7.144 -3.708 -0.004 0.153 P PLC 42 PLC H11 1H1 H 0 1 N N N -1.175 85.613 7.114 -3.509 2.557 -0.433 H11 PLC 43 PLC H12 2H1 H 0 1 N N N -2.589 84.996 6.436 -3.201 1.581 -1.889 H12 PLC 44 PLC H2 H2 H 0 1 N N N -1.622 87.043 5.223 -1.844 3.656 -1.905 H2 PLC 45 PLC H31 1H3 H 0 1 N N N 0.824 86.478 5.338 -1.679 3.943 0.552 H31 PLC 46 PLC H32 2H3 H 0 1 N N N 0.637 85.030 4.520 -0.067 3.954 -0.202 H32 PLC 47 PLC H41 1H4 H 0 1 N N N -1.729 79.654 7.707 -5.270 -1.337 1.803 H41 PLC 48 PLC H42 2H4 H 0 1 N N N -0.455 80.543 8.319 -4.962 -2.313 0.347 H42 PLC 49 PLC H51 1H5 H 0 1 N N N -0.233 79.447 5.336 -5.166 -3.822 2.247 H51 PLC 50 PLC H52 2H5 H 0 1 N N N 1.050 80.048 6.199 -3.460 -3.791 1.740 H52 PLC 51 PLC H61 1H6 H 0 1 N N N 0.821 76.206 6.600 -2.910 -1.368 4.852 H61 PLC 52 PLC H62 2H6 H 0 1 N N N 0.008 77.134 5.223 -4.362 -2.142 5.530 H62 PLC 53 PLC H63 3H6 H 0 1 N N N 1.619 77.509 5.559 -2.845 -3.063 5.393 H63 PLC 54 PLC H71 1H7 H 0 1 N N N -0.892 76.887 8.229 -4.033 -4.243 5.065 H71 PLC 55 PLC H72 2H7 H 0 1 N N N -1.362 78.676 8.421 -4.507 -4.780 3.435 H72 PLC 56 PLC H73 3H7 H 0 1 N N N -1.886 77.904 7.030 -5.584 -3.714 4.369 H73 PLC 57 PLC H81 1H8 H 0 1 N N N 1.314 77.367 8.699 -1.856 -2.082 3.715 H81 PLC 58 PLC H82 2H8 H 0 1 N N N 2.161 78.804 7.890 -2.036 -3.820 3.376 H82 PLC 59 PLC H83 3H8 H 0 1 N N N 0.867 79.155 8.904 -2.331 -2.626 2.088 H83 PLC 60 PLC "H1'1" "1H1'" H 0 0 N N N -3.689 84.151 2.408 1.440 1.487 -3.824 "H1'1" PLC 61 PLC "H1'2" "2H1'" H 0 0 N N N -4.848 83.855 3.586 0.356 0.077 -3.737 "H1'2" PLC 62 PLC "H2'1" "1H2'" H 0 0 N N N -6.279 85.618 2.853 -0.804 0.844 -5.789 "H2'1" PLC 63 PLC "H2'2" "2H2'" H 0 0 N N N -5.027 86.767 2.850 0.278 2.253 -5.876 "H2'2" PLC 64 PLC "H3'1" "1H3'" H 0 0 N N N -6.204 85.593 0.509 2.232 0.739 -6.072 "H3'1" PLC 65 PLC "H3'2" "2H3'" H 0 0 N N N -4.882 86.655 0.512 1.148 -0.670 -5.985 "H3'2" PLC 66 PLC "H4'1" "1H4'" H 0 0 N N N -3.221 84.635 0.834 -0.012 0.096 -8.038 "H4'1" PLC 67 PLC "H4'2" "2H4'" H 0 0 N N N -4.517 83.555 0.924 1.071 1.505 -8.124 "H4'2" PLC 68 PLC "H5'1" "1H5'" H 0 0 N N N -4.848 85.326 -1.490 3.024 -0.008 -8.321 "H5'1" PLC 69 PLC "H5'2" "2H5'" H 0 0 N N N -3.284 84.634 -1.491 1.940 -1.418 -8.234 "H5'2" PLC 70 PLC "H6'1" "1H6'" H 0 0 N N N -5.317 82.502 -0.850 0.779 -0.651 -10.286 "H6'1" PLC 71 PLC "H6'2" "2H6'" H 0 0 N N N -5.800 83.321 -2.234 1.863 0.757 -10.373 "H6'2" PLC 72 PLC "H7'1" "1H7'" H 0 0 N N N -4.049 82.262 -3.505 2.733 -2.166 -10.482 "H7'1" PLC 73 PLC "H7'2" "2H7'" H 0 0 N N N -2.884 83.106 -2.641 3.816 -0.756 -10.569 "H7'2" PLC 74 PLC "H8'1" "1H8'" H 0 0 N N N -3.081 81.393 -0.644 1.571 -1.399 -12.534 "H8'1" PLC 75 PLC "H8'2" "2H8'" H 0 0 N N N -4.293 80.542 -1.495 2.655 0.009 -12.621 "H8'2" PLC 76 PLC "H9'1" "1H9'" H 0 0 N N N -2.686 79.828 -3.305 4.609 -1.504 -12.817 "H9'1" PLC 77 PLC "H9'2" "2H9'" H 0 0 N N N -1.505 80.936 -2.822 3.525 -2.913 -12.731 "H9'2" PLC 78 PLC "HT'1" "1HT'" H 0 0 N N N -1.677 79.693 -0.359 2.363 -2.147 -14.783 "HT'1" PLC 79 PLC "HT'2" "2HT'" H 0 0 N N N -2.470 78.453 -1.204 3.447 -0.738 -14.870 "HT'2" PLC 80 PLC "HE'1" "1HE'" H 0 0 N N N 0.027 77.971 -1.136 4.226 -2.553 -16.369 "HE'1" PLC 81 PLC "HE'2" "2HE'" H 0 0 N N N -0.448 78.304 -2.881 5.401 -2.252 -15.066 "HE'2" PLC 82 PLC "HE'3" "3HE'" H 0 0 N N N 0.344 79.544 -2.036 4.317 -3.661 -14.979 "HE'3" PLC 83 PLC H1A1 '1H1"' H 0 0 N N N 2.237 86.629 4.947 1.172 0.681 2.395 H1A1 PLC 84 PLC H1A2 '2H1"' H 0 0 N N N 3.020 85.890 3.675 -0.439 0.669 3.150 H1A2 PLC 85 PLC H2A1 '1H2"' H 0 0 N N N 3.295 88.704 2.974 0.298 2.409 4.755 H2A1 PLC 86 PLC H2A2 '2H2"' H 0 0 N N N 3.365 88.748 4.689 1.910 2.421 4.000 H2A2 PLC 87 PLC H3A1 '1H3"' H 0 0 N N N 5.188 86.745 3.237 2.198 0.026 4.577 H3A1 PLC 88 PLC H3A2 '2H3"' H 0 0 N N N 5.574 88.403 3.109 0.586 0.015 5.332 H3A2 PLC 89 PLC H4A1 '1H4"' H 0 0 N N N 6.558 88.376 5.207 1.324 1.754 6.937 H4A1 PLC 90 PLC H4A2 '2H4"' H 0 0 N N N 5.057 88.078 5.944 2.936 1.766 6.182 H4A2 PLC 91 PLC H5A1 '1H5"' H 0 0 N N N 5.461 85.505 5.089 3.224 -0.627 6.759 H5A1 PLC 92 PLC H5A2 '2H5"' H 0 0 N N N 7.102 86.006 4.952 1.612 -0.639 7.514 H5A2 PLC 93 PLC H6A1 '1H6"' H 0 0 N N N 7.367 86.326 7.367 2.350 1.100 9.119 H6A1 PLC 94 PLC H6A2 '2H6"' H 0 0 N N N 5.713 86.510 7.655 3.962 1.112 8.364 H6A2 PLC 95 PLC H7A1 '1H7"' H 0 0 N N N 6.873 83.862 6.473 4.250 -1.282 8.941 H7A1 PLC 96 PLC H7A2 '2H7"' H 0 0 N N N 6.813 84.133 8.165 2.638 -1.293 9.696 H7A2 PLC 97 PLC H8A1 '1H8"' H 0 0 N N N 4.096 84.564 6.867 3.376 0.446 11.301 H8A1 PLC 98 PLC H8A2 '2H8"' H 0 0 N N N 4.704 83.021 6.530 4.988 0.457 10.546 H8A2 PLC 99 PLC H9A1 '1H9"' H 0 0 N N N 5.147 82.557 9.010 5.276 -1.936 11.123 H9A1 PLC 100 PLC H9A2 '2H9"' H 0 0 N N N 4.761 84.172 9.427 3.664 -1.948 11.878 H9A2 PLC 101 PLC HTA1 '1HT"' H 0 0 N N N 2.326 83.621 8.300 4.402 -0.208 13.483 HTA1 PLC 102 PLC HTA2 '2HT"' H 0 0 N N N 2.795 81.995 8.434 6.014 -0.196 12.728 HTA2 PLC 103 PLC HEA1 '1HE"' H 0 0 N N N 1.550 82.697 10.556 6.302 -2.591 13.305 HEA1 PLC 104 PLC HEA2 '2HE"' H 0 0 N N N 3.301 82.353 11.004 4.690 -2.602 14.060 HEA2 PLC 105 PLC HEA3 '3HE"' H 0 0 N N N 2.832 83.979 10.870 5.994 -1.615 14.762 HEA3 PLC 106 PLC HOP2 2HOP H 0 0 N N N 0.787 82.408 7.784 -4.373 1.207 1.739 HOP2 PLC 107 # loop_ _chem_comp_bond.comp_id _chem_comp_bond.atom_id_1 _chem_comp_bond.atom_id_2 _chem_comp_bond.value_order _chem_comp_bond.pdbx_aromatic_flag _chem_comp_bond.pdbx_stereo_config _chem_comp_bond.pdbx_ordinal PLC C1 C2 SING N N 1 PLC C1 O3P SING N N 2 PLC C1 H11 SING N N 3 PLC C1 H12 SING N N 4 PLC C2 C3 SING N N 5 PLC C2 O2 SING N N 6 PLC C2 H2 SING N N 7 PLC C3 O3 SING N N 8 PLC C3 H31 SING N N 9 PLC C3 H32 SING N N 10 PLC C4 C5 SING N N 11 PLC C4 O4P SING N N 12 PLC C4 H41 SING N N 13 PLC C4 H42 SING N N 14 PLC C5 N SING N N 15 PLC C5 H51 SING N N 16 PLC C5 H52 SING N N 17 PLC C6 N SING N N 18 PLC C6 H61 SING N N 19 PLC C6 H62 SING N N 20 PLC C6 H63 SING N N 21 PLC C7 N SING N N 22 PLC C7 H71 SING N N 23 PLC C7 H72 SING N N 24 PLC C7 H73 SING N N 25 PLC C8 N SING N N 26 PLC C8 H81 SING N N 27 PLC C8 H82 SING N N 28 PLC C8 H83 SING N N 29 PLC "C'" "C1'" SING N N 30 PLC "C'" "O'" DOUB N N 31 PLC "C'" O2 SING N N 32 PLC "C1'" "C2'" SING N N 33 PLC "C1'" "H1'1" SING N N 34 PLC "C1'" "H1'2" SING N N 35 PLC "C2'" "C3'" SING N N 36 PLC "C2'" "H2'1" SING N N 37 PLC "C2'" "H2'2" SING N N 38 PLC "C3'" "C4'" SING N N 39 PLC "C3'" "H3'1" SING N N 40 PLC "C3'" "H3'2" SING N N 41 PLC "C4'" "C5'" SING N N 42 PLC "C4'" "H4'1" SING N N 43 PLC "C4'" "H4'2" SING N N 44 PLC "C5'" "C6'" SING N N 45 PLC "C5'" "H5'1" SING N N 46 PLC "C5'" "H5'2" SING N N 47 PLC "C6'" "C7'" SING N N 48 PLC "C6'" "H6'1" SING N N 49 PLC "C6'" "H6'2" SING N N 50 PLC "C7'" "C8'" SING N N 51 PLC "C7'" "H7'1" SING N N 52 PLC "C7'" "H7'2" SING N N 53 PLC "C8'" "C9'" SING N N 54 PLC "C8'" "H8'1" SING N N 55 PLC "C8'" "H8'2" SING N N 56 PLC "C9'" "CA'" SING N N 57 PLC "C9'" "H9'1" SING N N 58 PLC "C9'" "H9'2" SING N N 59 PLC "CA'" "CB'" SING N N 60 PLC "CA'" "HT'1" SING N N 61 PLC "CA'" "HT'2" SING N N 62 PLC "CB'" "HE'1" SING N N 63 PLC "CB'" "HE'2" SING N N 64 PLC "CB'" "HE'3" SING N N 65 PLC CB C1B SING N N 66 PLC CB OB DOUB N N 67 PLC CB O3 SING N N 68 PLC C1B C2B SING N N 69 PLC C1B H1A1 SING N N 70 PLC C1B H1A2 SING N N 71 PLC C2B C3B SING N N 72 PLC C2B H2A1 SING N N 73 PLC C2B H2A2 SING N N 74 PLC C3B C4B SING N N 75 PLC C3B H3A1 SING N N 76 PLC C3B H3A2 SING N N 77 PLC C4B C5B SING N N 78 PLC C4B H4A1 SING N N 79 PLC C4B H4A2 SING N N 80 PLC C5B C6B SING N N 81 PLC C5B H5A1 SING N N 82 PLC C5B H5A2 SING N N 83 PLC C6B C7B SING N N 84 PLC C6B H6A1 SING N N 85 PLC C6B H6A2 SING N N 86 PLC C7B C8B SING N N 87 PLC C7B H7A1 SING N N 88 PLC C7B H7A2 SING N N 89 PLC C8B C9B SING N N 90 PLC C8B H8A1 SING N N 91 PLC C8B H8A2 SING N N 92 PLC C9B CAA SING N N 93 PLC C9B H9A1 SING N N 94 PLC C9B H9A2 SING N N 95 PLC CAA CBA SING N N 96 PLC CAA HTA1 SING N N 97 PLC CAA HTA2 SING N N 98 PLC CBA HEA1 SING N N 99 PLC CBA HEA2 SING N N 100 PLC CBA HEA3 SING N N 101 PLC O1P P DOUB N N 102 PLC O2P P SING N N 103 PLC O2P HOP2 SING N N 104 PLC O3P P SING N N 105 PLC O4P P SING N N 106 # loop_ _pdbx_chem_comp_descriptor.comp_id _pdbx_chem_comp_descriptor.type _pdbx_chem_comp_descriptor.program _pdbx_chem_comp_descriptor.program_version _pdbx_chem_comp_descriptor.descriptor PLC SMILES ACDLabs 10.04 "O=C(OCC(OC(=O)CCCCCCCCCCC)COP(=O)(OCC[N+](C)(C)C)O)CCCCCCCCCCC" PLC SMILES_CANONICAL CACTVS 3.341 "CCCCCCCCCCCC(=O)OC[C@H](CO[P@@](O)(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCCCCCC" PLC SMILES CACTVS 3.341 "CCCCCCCCCCCC(=O)OC[CH](CO[P](O)(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCCCCCC" PLC SMILES_CANONICAL "OpenEye OEToolkits" 1.5.0 "CCCCCCCCCCCC(=O)OC[C@H](CO[P@](=O)(O)OCC[N+](C)(C)C)OC(=O)CCCCCCCCCCC" PLC SMILES "OpenEye OEToolkits" 1.5.0 "CCCCCCCCCCCC(=O)OCC(COP(=O)(O)OCC[N+](C)(C)C)OC(=O)CCCCCCCCCCC" PLC InChI InChI 1.03 "InChI=1S/C32H64NO8P/c1-6-8-10-12-14-16-18-20-22-24-31(34)38-28-30(29-40-42(36,37)39-27-26-33(3,4)5)41-32(35)25-23-21-19-17-15-13-11-9-7-2/h30H,6-29H2,1-5H3/p+1/t30-/m1/s1" PLC InChIKey InChI 1.03 IJFVSSZAOYLHEE-SSEXGKCCSA-O # loop_ _pdbx_chem_comp_identifier.comp_id _pdbx_chem_comp_identifier.type _pdbx_chem_comp_identifier.program _pdbx_chem_comp_identifier.program_version _pdbx_chem_comp_identifier.identifier PLC "SYSTEMATIC NAME" ACDLabs 10.04 "(4R,7R)-7-(dodecanoyloxy)-4-hydroxy-N,N,N-trimethyl-10-oxo-3,5,9-trioxa-4-phosphahenicosan-1-aminium 4-oxide" PLC "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.5.0 "2-[[(2R)-2,3-di(dodecanoyloxy)propoxy]-hydroxy-phosphoryl]oxyethyl-trimethyl-azanium" # loop_ _pdbx_chem_comp_audit.comp_id _pdbx_chem_comp_audit.action_type _pdbx_chem_comp_audit.date _pdbx_chem_comp_audit.processing_site PLC "Create component" 1999-07-08 RCSB PLC "Modify descriptor" 2011-06-04 RCSB #