data_F4M # _chem_comp.id F4M _chem_comp.name ;1-[4-({(1R)-1-[(6S,7R)-2-amino-5-formyl-7-methyl-4-oxo-1,4,5,6,7,8-hexahydropteridin-6-yl]ethyl}amino)phenyl]-1-deoxy-5 -O-{5-O-[(R)-{[(1R)-1,3-dicarboxypropyl]oxy}(hydroxy)phosphoryl]-alpha-D-ribofuranosyl}-D-ribitol ; _chem_comp.type NON-POLYMER _chem_comp.pdbx_type HETAIN _chem_comp.formula "C31 H45 N6 O17 P" _chem_comp.mon_nstd_parent_comp_id ? _chem_comp.pdbx_synonyms N5-formyl-tetrahydromethanopterin _chem_comp.pdbx_formal_charge 0 _chem_comp.pdbx_initial_date 2012-09-20 _chem_comp.pdbx_modified_date 2020-06-17 _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 804.693 _chem_comp.one_letter_code ? _chem_comp.three_letter_code F4M _chem_comp.pdbx_model_coordinates_details ? _chem_comp.pdbx_model_coordinates_missing_flag N _chem_comp.pdbx_ideal_coordinates_details Corina _chem_comp.pdbx_ideal_coordinates_missing_flag N _chem_comp.pdbx_model_coordinates_db_code 4GVS _chem_comp.pdbx_subcomponent_list ? _chem_comp.pdbx_processing_site PDBJ # # 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 F4M O96 O96 O 0 1 N N N -12.255 -27.672 54.492 -10.423 -2.080 0.391 O96 F4M 1 F4M C5 C5 C 0 1 N N N -12.101 -26.510 54.739 -10.400 -1.008 -0.176 C5 F4M 2 F4M N2 N2 N 0 1 N N N -12.961 -26.065 55.709 -9.819 0.055 0.416 N2 F4M 3 F4M C6 C6 C 0 1 N N N -12.317 -25.748 56.960 -9.682 1.277 -0.273 C6 F4M 4 F4M C7 C7 C 0 1 N N N -13.024 -24.887 57.907 -9.401 2.425 0.413 C7 F4M 5 F4M N4 N4 N 0 1 N N N -12.485 -24.645 59.119 -9.278 3.601 -0.280 N4 F4M 6 F4M C8 C8 C 0 1 N N N -11.310 -25.130 59.546 -9.432 3.614 -1.633 C8 F4M 7 F4M N6 N6 N 0 1 N N N -10.876 -24.828 60.808 -9.306 4.798 -2.311 N6 F4M 8 F4M N5 N5 N 0 1 N N N -10.575 -25.936 58.747 -9.700 2.513 -2.303 N5 F4M 9 F4M C9 C9 C 0 1 N N N -11.017 -26.255 57.485 -9.831 1.334 -1.674 C9 F4M 10 F4M O1 O1 O 0 1 N N N -10.272 -26.982 56.858 -10.078 0.319 -2.310 O1 F4M 11 F4M N3 N3 N 0 1 N N N -14.229 -24.383 57.530 -9.242 2.399 1.782 N3 F4M 12 F4M C2 C2 C 0 1 N N R -14.896 -24.584 56.237 -9.740 1.241 2.539 C2 F4M 13 F4M C1 C1 C 0 1 N N N -15.409 -23.266 55.650 -11.266 1.302 2.631 C1 F4M 14 F4M C3 C3 C 0 1 N N S -14.143 -25.341 55.132 -9.321 -0.034 1.798 C3 F4M 15 F4M C4 C4 C 0 1 N N R -15.258 -26.173 54.345 -7.795 -0.145 1.792 C4 F4M 16 F4M C31 C31 C 0 1 N N N -15.968 -25.369 53.215 -7.294 -0.361 3.221 C31 F4M 17 F4M N1 N1 N 0 1 N N N -14.910 -27.515 53.826 -7.391 -1.278 0.956 N1 F4M 18 F4M C10 C10 C 0 1 Y N N -15.471 -28.747 54.103 -6.125 -1.295 0.366 C10 F4M 19 F4M C11 C11 C 0 1 Y N N -14.731 -29.903 53.814 -5.245 -0.241 0.577 C11 F4M 20 F4M C12 C12 C 0 1 Y N N -15.223 -31.197 54.045 -3.994 -0.261 -0.007 C12 F4M 21 F4M C15 C15 C 0 1 Y N N -16.748 -28.931 54.659 -5.741 -2.369 -0.427 C15 F4M 22 F4M C14 C14 C 0 1 Y N N -17.259 -30.226 54.913 -4.488 -2.383 -1.008 C14 F4M 23 F4M C13 C13 C 0 1 Y N N -16.499 -31.364 54.597 -3.617 -1.329 -0.801 C13 F4M 24 F4M C16 C16 C 0 1 N N N -17.045 -32.753 54.859 -2.251 -1.347 -1.437 C16 F4M 25 F4M C17 C17 C 0 1 N N S -18.426 -33.421 55.808 -1.257 -2.027 -0.492 C17 F4M 26 F4M O16 O16 O 0 1 N N N -17.200 -34.081 56.124 -1.112 -1.242 0.693 O16 F4M 27 F4M C18 C18 C 0 1 N N S -19.298 -34.174 54.755 0.100 -2.158 -1.187 C18 F4M 28 F4M O15 O15 O 0 1 N N N -20.006 -33.226 53.936 -0.045 -2.944 -2.372 O15 F4M 29 F4M C19 C19 C 0 1 N N R -20.249 -35.339 55.171 1.093 -2.838 -0.242 C19 F4M 30 F4M O14 O14 O 0 1 N N N -19.547 -36.591 55.060 1.238 -2.052 0.942 O14 F4M 31 F4M C20 C20 C 0 1 N N N -21.606 -35.435 54.392 2.450 -2.968 -0.937 C20 F4M 32 F4M O2 O2 O 0 1 N N N -22.239 -36.748 54.377 3.344 -3.706 -0.101 O2 F4M 33 F4M C21 C21 C 0 1 N N S -23.435 -37.116 53.556 4.647 -3.886 -0.660 C21 F4M 34 F4M C22 C22 C 0 1 N N R -23.508 -36.766 52.057 5.451 -4.887 0.197 C22 F4M 35 F4M O13 O13 O 0 1 N N N -22.689 -35.644 51.747 4.927 -4.954 1.525 O13 F4M 36 F4M C23 C23 C 0 1 N N S -24.973 -36.486 51.796 6.872 -4.260 0.190 C23 F4M 37 F4M O12 O12 O 0 1 N N N -25.198 -35.101 51.890 7.595 -4.610 1.372 O12 F4M 38 F4M O3 O3 O 0 1 N N N -24.785 -36.874 54.057 5.355 -2.641 -0.651 O3 F4M 39 F4M C24 C24 C 0 1 N N R -25.710 -36.994 53.003 6.526 -2.749 0.174 C24 F4M 40 F4M C25 C25 C 0 1 N N N -26.423 -38.327 52.856 7.680 -1.948 -0.434 C25 F4M 41 F4M O4 O4 O 0 1 N N N -26.705 -38.701 51.481 7.393 -0.551 -0.334 O4 F4M 42 F4M P P P 0 1 N N N -27.916 -38.540 50.336 8.392 0.589 -0.875 P F4M 43 F4M O5 O5 O 0 1 N N N -27.298 -38.490 48.997 9.727 0.407 -0.261 O5 F4M 44 F4M O6 O6 O 0 1 N N N -28.928 -39.600 50.367 8.518 0.478 -2.476 O6 F4M 45 F4M O7 O7 O 0 1 N N N -28.792 -37.201 50.625 7.814 2.040 -0.482 O7 F4M 46 F4M C26 C26 C 0 1 N N R -29.937 -36.838 49.850 8.525 3.254 -0.730 C26 F4M 47 F4M C30 C30 C 0 1 N N N -30.978 -37.942 49.794 7.707 4.139 -1.636 C30 F4M 48 F4M O10 O10 O 0 1 N N N -32.009 -37.897 50.527 8.220 5.294 -2.087 O10 F4M 49 F4M O11 O11 O 0 1 N N N -30.775 -38.891 49.012 6.590 3.808 -1.955 O11 F4M 50 F4M C27 C27 C 0 1 N N N -30.475 -35.471 50.298 8.779 3.977 0.595 C27 F4M 51 F4M C28 C28 C 0 1 N N N -29.819 -34.257 49.587 9.712 3.132 1.465 C28 F4M 52 F4M C29 C29 C 0 1 N N N -30.472 -32.868 49.705 9.962 3.843 2.770 C29 F4M 53 F4M O9 O9 O 0 1 N N N -29.919 -31.911 49.119 9.447 4.916 2.982 O9 F4M 54 F4M O8 O8 O 0 1 N N N -31.529 -32.669 50.357 10.757 3.286 3.697 O8 F4M 55 F4M H2 H2 H 0 1 N N N -11.368 -25.884 54.252 -10.840 -0.906 -1.157 H2 F4M 56 F4M H4 H4 H 0 1 N N N -10.012 -25.204 61.143 -9.109 5.615 -1.827 H4 F4M 57 F4M H5 H5 H 0 1 N N N -11.423 -24.231 61.395 -9.413 4.819 -3.275 H5 F4M 58 F4M H7 H7 H 0 1 N N N -15.953 -22.706 56.425 -11.692 1.288 1.628 H7 F4M 59 F4M H8 H8 H 0 1 N N N -14.558 -22.667 55.294 -11.631 0.442 3.193 H8 F4M 60 F4M H9 H9 H 0 1 N N N -16.085 -23.478 54.809 -11.563 2.219 3.139 H9 F4M 61 F4M H10 H10 H 0 1 N N N -16.043 -26.347 55.095 -7.365 0.773 1.392 H10 F4M 62 F4M H11 H11 H 0 1 N N N -16.233 -24.368 53.587 -6.207 -0.441 3.217 H11 F4M 63 F4M H12 H12 H 0 1 N N N -15.291 -25.272 52.353 -7.594 0.482 3.843 H12 F4M 64 F4M H13 H13 H 0 1 N N N -16.881 -25.899 52.907 -7.723 -1.280 3.622 H13 F4M 65 F4M H14 H14 H 0 1 N N N -13.945 -27.627 54.065 -8.003 -2.017 0.812 H14 F4M 66 F4M H15 H15 H 0 1 N N N -13.741 -29.793 53.396 -5.540 0.594 1.196 H15 F4M 67 F4M H16 H16 H 0 1 N N N -14.621 -32.059 53.798 -3.310 0.558 0.155 H16 F4M 68 F4M H17 H17 H 0 1 N N N -17.351 -28.067 54.897 -6.421 -3.192 -0.588 H17 F4M 69 F4M H18 H18 H 0 1 N N N -18.239 -30.340 55.352 -4.189 -3.217 -1.624 H18 F4M 70 F4M H19 H19 H 0 1 N N N -17.240 -33.133 53.845 -2.295 -1.899 -2.376 H19 F4M 71 F4M H20 H20 H 0 1 N N N -18.906 -32.710 56.496 -1.627 -3.018 -0.228 H20 F4M 72 F4M H21 H21 H 0 1 N N N -18.565 -34.649 54.087 0.469 -1.167 -1.451 H21 F4M 73 F4M H22 H22 H 0 1 N N N -19.420 -32.521 53.688 -0.372 -3.840 -2.212 H22 F4M 74 F4M H23 H23 H 0 1 N N N -20.503 -35.179 56.229 0.723 -3.829 0.022 H23 F4M 75 F4M H24 H24 H 0 1 N N N -18.724 -36.536 55.531 1.564 -1.156 0.782 H24 F4M 76 F4M H25 H25 H 0 1 N N N -21.418 -35.139 53.349 2.324 -3.491 -1.885 H25 F4M 77 F4M H26 H26 H 0 1 N N N -22.310 -34.726 54.853 2.860 -1.976 -1.122 H26 F4M 78 F4M H27 H27 H 0 1 N N N -23.378 -38.214 53.533 4.563 -4.256 -1.682 H27 F4M 79 F4M H28 H28 H 0 1 N N N -23.197 -37.644 51.471 5.460 -5.874 -0.265 H28 F4M 80 F4M H29 H29 H 0 1 N N N -21.780 -35.857 51.923 4.010 -5.259 1.571 H29 F4M 81 F4M H30 H30 H 0 1 N N N -25.328 -36.941 50.859 7.423 -4.547 -0.705 H30 F4M 82 F4M H31 H31 H 0 1 N N N -26.116 -34.917 51.727 7.739 -5.560 1.478 H31 F4M 83 F4M H32 H32 H 0 1 N N N -26.504 -36.258 53.195 6.312 -2.399 1.183 H32 F4M 84 F4M H33 H33 H 0 1 N N N -27.377 -38.270 53.401 8.600 -2.169 0.107 H33 F4M 85 F4M H34 H34 H 0 1 N N N -25.791 -39.108 53.304 7.799 -2.220 -1.482 H34 F4M 86 F4M H35 H35 H 0 1 N N N -29.673 -39.343 49.836 7.680 0.587 -2.945 H35 F4M 87 F4M H36 H36 H 0 1 N N N -29.591 -36.697 48.815 9.478 3.027 -1.208 H36 F4M 88 F4M H37 H37 H 0 1 N N N -32.544 -38.666 50.370 7.658 5.828 -2.665 H37 F4M 89 F4M H38 H38 H 0 1 N N N -30.301 -35.371 51.380 9.241 4.944 0.398 H38 F4M 90 F4M H39 H39 H 0 1 N N N -31.556 -35.444 50.096 7.832 4.125 1.115 H39 F4M 91 F4M H40 H40 H 0 1 N N N -29.774 -34.500 48.515 9.249 2.165 1.661 H40 F4M 92 F4M H41 H41 H 0 1 N N N -28.798 -34.166 49.986 10.658 2.984 0.945 H41 F4M 93 F4M H42 H42 H 0 1 N N N -31.767 -31.751 50.302 10.887 3.780 4.518 H42 F4M 94 F4M H1 H1 H 0 1 N N N -13.000 -24.060 59.746 -9.082 4.425 0.193 H1 F4M 95 F4M H3 H3 H 0 1 N N N -14.136 -23.392 57.623 -8.807 3.135 2.240 H3 F4M 96 F4M H6 H6 H 0 1 N N N -15.794 -25.184 56.444 -9.310 1.244 3.540 H6 F4M 97 F4M H43 H43 H 0 1 N N N -13.760 -24.589 54.427 -9.753 -0.905 2.291 H43 F4M 98 F4M H44 H44 H 0 1 N N N -16.179 -33.278 55.287 -1.926 -0.325 -1.630 H44 F4M 99 F4M H45 H45 H 0 1 N N N -16.722 -33.571 56.767 -0.786 -0.345 0.533 H45 F4M 100 # # 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 F4M O5 P DOUB N N 1 F4M O11 C30 DOUB N N 2 F4M O9 C29 DOUB N N 3 F4M C28 C29 SING N N 4 F4M C28 C27 SING N N 5 F4M C29 O8 SING N N 6 F4M C30 C26 SING N N 7 F4M C30 O10 SING N N 8 F4M C26 C27 SING N N 9 F4M C26 O7 SING N N 10 F4M P O6 SING N N 11 F4M P O7 SING N N 12 F4M P O4 SING N N 13 F4M O4 C25 SING N N 14 F4M O13 C22 SING N N 15 F4M C23 O12 SING N N 16 F4M C23 C22 SING N N 17 F4M C23 C24 SING N N 18 F4M C22 C21 SING N N 19 F4M C25 C24 SING N N 20 F4M C24 O3 SING N N 21 F4M C31 C4 SING N N 22 F4M C21 O3 SING N N 23 F4M C21 O2 SING N N 24 F4M C11 C12 DOUB Y N 25 F4M C11 C10 SING Y N 26 F4M N1 C10 SING N N 27 F4M N1 C4 SING N N 28 F4M O15 C18 SING N N 29 F4M C12 C13 SING Y N 30 F4M C10 C15 DOUB Y N 31 F4M C4 C3 SING N N 32 F4M O2 C20 SING N N 33 F4M C20 C19 SING N N 34 F4M O96 C5 DOUB N N 35 F4M C13 C16 SING N N 36 F4M C13 C14 DOUB Y N 37 F4M C15 C14 SING Y N 38 F4M C5 N2 SING N N 39 F4M C18 C19 SING N N 40 F4M C18 C17 SING N N 41 F4M C16 C17 SING N N 42 F4M O14 C19 SING N N 43 F4M C3 N2 SING N N 44 F4M C3 C2 SING N N 45 F4M C1 C2 SING N N 46 F4M N2 C6 SING N N 47 F4M C17 O16 SING N N 48 F4M C2 N3 SING N N 49 F4M O1 C9 DOUB N N 50 F4M C6 C9 SING N N 51 F4M C6 C7 DOUB N N 52 F4M C9 N5 SING N N 53 F4M N3 C7 SING N N 54 F4M C7 N4 SING N N 55 F4M N5 C8 DOUB N N 56 F4M N4 C8 SING N N 57 F4M C8 N6 SING N N 58 F4M C5 H2 SING N N 59 F4M N6 H4 SING N N 60 F4M N6 H5 SING N N 61 F4M C1 H7 SING N N 62 F4M C1 H8 SING N N 63 F4M C1 H9 SING N N 64 F4M C4 H10 SING N N 65 F4M C31 H11 SING N N 66 F4M C31 H12 SING N N 67 F4M C31 H13 SING N N 68 F4M N1 H14 SING N N 69 F4M C11 H15 SING N N 70 F4M C12 H16 SING N N 71 F4M C15 H17 SING N N 72 F4M C14 H18 SING N N 73 F4M C16 H19 SING N N 74 F4M C17 H20 SING N N 75 F4M C18 H21 SING N N 76 F4M O15 H22 SING N N 77 F4M C19 H23 SING N N 78 F4M O14 H24 SING N N 79 F4M C20 H25 SING N N 80 F4M C20 H26 SING N N 81 F4M C21 H27 SING N N 82 F4M C22 H28 SING N N 83 F4M O13 H29 SING N N 84 F4M C23 H30 SING N N 85 F4M O12 H31 SING N N 86 F4M C24 H32 SING N N 87 F4M C25 H33 SING N N 88 F4M C25 H34 SING N N 89 F4M O6 H35 SING N N 90 F4M C26 H36 SING N N 91 F4M O10 H37 SING N N 92 F4M C27 H38 SING N N 93 F4M C27 H39 SING N N 94 F4M C28 H40 SING N N 95 F4M C28 H41 SING N N 96 F4M O8 H42 SING N N 97 F4M N4 H1 SING N N 98 F4M N3 H3 SING N N 99 F4M C2 H6 SING N N 100 F4M C3 H43 SING N N 101 F4M C16 H44 SING N N 102 F4M O16 H45 SING N N 103 # # 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 F4M SMILES ACDLabs 12.01 "O=C2N=C(N)NC=1NC(C)C(N(C=O)C=12)C(Nc3ccc(cc3)CC(O)C(O)C(O)COC4OC(C(O)C4O)COP(=O)(OC(C(=O)O)CCC(=O)O)O)C" F4M InChI InChI 1.03 "InChI=1S/C31H45N6O17P/c1-13(22-14(2)34-27-23(37(22)12-38)28(46)36-31(32)35-27)33-16-5-3-15(4-6-16)9-17(39)24(43)18(40)10-51-30-26(45)25(44)20(53-30)11-52-55(49,50)54-19(29(47)48)7-8-21(41)42/h3-6,12-14,17-20,22,24-26,30,33,39-40,43-45H,7-11H2,1-2H3,(H,41,42)(H,47,48)(H,49,50)(H4,32,34,35,36,46)/t13-,14?,17+,18-,19-,20-,22?,24+,25-,26-,30+/m1/s1" F4M InChIKey InChI 1.03 RMPHWTMYCVTPKB-DSWDSYRTSA-N F4M SMILES_CANONICAL CACTVS 3.370 "C[C@@H](Nc1ccc(C[C@H](O)[C@H](O)[C@H](O)CO[C@H]2O[C@H](CO[P](O)(=O)O[C@H](CCC(O)=O)C(O)=O)[C@@H](O)[C@H]2O)cc1)[C@H]3[C@@H](C)NC4=C(N3C=O)C(=O)N=C(N)N4" F4M SMILES CACTVS 3.370 "C[CH](Nc1ccc(C[CH](O)[CH](O)[CH](O)CO[CH]2O[CH](CO[P](O)(=O)O[CH](CCC(O)=O)C(O)=O)[CH](O)[CH]2O)cc1)[CH]3[CH](C)NC4=C(N3C=O)C(=O)N=C(N)N4" F4M SMILES_CANONICAL "OpenEye OEToolkits" 1.7.6 "CC1C(N(C2=C(N1)NC(=NC2=O)N)C=O)[C@@H](C)Nc3ccc(cc3)C[C@@H]([C@@H]([C@@H](CO[C@@H]4[C@@H]([C@@H]([C@H](O4)COP(=O)(O)O[C@H](CCC(=O)O)C(=O)O)O)O)O)O)O" F4M SMILES "OpenEye OEToolkits" 1.7.6 "CC1C(N(C2=C(N1)NC(=NC2=O)N)C=O)C(C)Nc3ccc(cc3)CC(C(C(COC4C(C(C(O4)COP(=O)(O)OC(CCC(=O)O)C(=O)O)O)O)O)O)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 F4M "SYSTEMATIC NAME" ACDLabs 12.01 "1-[4-({(1R)-1-[(6S,7R)-2-amino-5-formyl-7-methyl-4-oxo-1,4,5,6,7,8-hexahydropteridin-6-yl]ethyl}amino)phenyl]-1-deoxy-5-O-{5-O-[(R)-{[(1R)-1,3-dicarboxypropyl]oxy}(hydroxy)phosphoryl]-alpha-D-ribofuranosyl}-D-ribitol" F4M "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.7.6 "(2R)-2-[[(2R,3S,4R,5S)-5-[(2R,3S,4S)-5-[4-[[(1R)-1-(2-azanyl-5-methanoyl-7-methyl-4-oxidanylidene-1,6,7,8-tetrahydropteridin-6-yl)ethyl]amino]phenyl]-2,3,4-tris(oxidanyl)pentoxy]-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxypentanedioic acid" # # loop_ _pdbx_chem_comp_audit.comp_id _pdbx_chem_comp_audit.action_type _pdbx_chem_comp_audit.date _pdbx_chem_comp_audit.processing_site F4M "Create component" 2012-09-20 PDBJ F4M "Initial release" 2012-10-26 RCSB F4M "Modify synonyms" 2020-06-05 PDBE # _pdbx_chem_comp_synonyms.ordinal 1 _pdbx_chem_comp_synonyms.comp_id F4M _pdbx_chem_comp_synonyms.name N5-formyl-tetrahydromethanopterin _pdbx_chem_comp_synonyms.provenance ? _pdbx_chem_comp_synonyms.type ? ##