data_MU4
# 
_chem_comp.id                                    MU4 
_chem_comp.name                                  "N-[2-(hexadecanoylamino)ethyl]-N~3~-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alaninamide" 
_chem_comp.type                                  NON-POLYMER 
_chem_comp.pdbx_type                             HETAIN 
_chem_comp.formula                               "C27 H54 N3 O8 P" 
_chem_comp.mon_nstd_parent_comp_id               ? 
_chem_comp.pdbx_synonyms                         ? 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     2019-04-15 
_chem_comp.pdbx_modified_date                    2024-09-27 
_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                        579.707 
_chem_comp.one_letter_code                       ? 
_chem_comp.three_letter_code                     MU4 
_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        6OKG 
_chem_comp.pdbx_subcomponent_list                ? 
_chem_comp.pdbx_processing_site                  RCSB 
_chem_comp.pdbx_pcm                              Y 
# 
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.pdbx_backbone_atom_flag 
_chem_comp_atom.pdbx_n_terminal_atom_flag 
_chem_comp_atom.pdbx_c_terminal_atom_flag 
_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 
MU4 O23 O1  O 0 1 N N N N N N -21.267 -12.051 -35.761 -10.947 -4.325 -0.689 O23 MU4 1  
MU4 P24 P1  P 0 1 N N N N N N -20.151 -11.712 -36.719 -10.563 -3.088 0.267  P24 MU4 2  
MU4 O25 O2  O 0 1 N N N N N N -19.852 -12.870 -37.639 -9.122  -3.352 0.934  O25 MU4 3  
MU4 O27 O3  O 0 1 N N N N N N -18.828 -11.299 -35.905 -10.511 -1.734 -0.603 O27 MU4 4  
MU4 C28 C1  C 0 1 N N N N N N -18.915 -10.474 -34.747 -10.299 -0.444 -0.023 C28 MU4 5  
MU4 C29 C2  C 0 1 N N N N N N -17.750 -10.816 -33.831 -10.307 0.617  -1.125 C29 MU4 6  
MU4 C30 C3  C 0 1 N N N N N N -17.709 -12.322 -33.619 -9.191  0.319  -2.129 C30 MU4 7  
MU4 C31 C4  C 0 1 N N N N N N -16.456 -10.343 -34.477 -11.658 0.597  -1.843 C31 MU4 8  
MU4 C32 C5  C 0 1 N N R N N N -17.961 -10.117 -32.486 -10.080 1.997  -0.505 C32 MU4 9  
MU4 O33 O4  O 0 1 N N N N N N -19.168 -10.597 -31.878 -11.189 2.332  0.330  O33 MU4 10 
MU4 C34 C6  C 0 1 N N N N N N -16.810 -10.326 -31.536 -8.818  1.976  0.319  C34 MU4 11 
MU4 O35 O5  O 0 1 N N N N N N -15.905 -9.509  -31.480 -8.881  2.077  1.526  O35 MU4 12 
MU4 N36 N1  N 0 1 N N N N N N -16.906 -11.345 -30.681 -7.621  1.845  -0.285 N36 MU4 13 
MU4 C37 C7  C 0 1 N N N N N N -15.859 -11.671 -29.730 -6.403  1.728  0.520  C37 MU4 14 
MU4 C38 C8  C 0 1 N N N N N N -14.805 -12.585 -30.347 -5.191  1.592  -0.404 C38 MU4 15 
MU4 C39 C9  C 0 1 N N N N N N -13.929 -13.149 -29.256 -3.938  1.471  0.425  C39 MU4 16 
MU4 O40 O6  O 0 1 N N N N N N -14.154 -12.871 -28.090 -4.008  1.491  1.636  O40 MU4 17 
MU4 N41 N2  N 0 1 N N N N N N -12.960 -13.979 -29.643 -2.740  1.340  -0.179 N41 MU4 18 
MU4 C42 C10 C 0 1 N N N N N N -12.043 -14.616 -28.714 -1.523  1.222  0.627  C42 MU4 19 
MU4 C43 C11 C 0 1 N N N N N N -10.614 -14.125 -28.912 -0.311  1.086  -0.298 C43 MU4 20 
MU4 C1  C12 C 0 1 N N N N N N -13.185 -7.298  -37.528 16.987  -0.713 -0.605 C1  MU4 21 
MU4 C10 C13 C 0 1 N N N N N N -13.003 -6.758  -32.700 12.020  -0.195 -0.440 C10 MU4 22 
MU4 C11 C14 C 0 1 N N N N N N -13.646 -7.168  -34.020 13.292  -0.318 0.402  C11 MU4 23 
MU4 C12 C15 C 0 1 N N N N N N -12.580 -7.306  -35.099 14.504  -0.454 -0.523 C12 MU4 24 
MU4 C13 C16 C 0 1 N N N N N N -13.069 -8.148  -36.270 15.776  -0.577 0.319  C13 MU4 25 
MU4 C14 C17 C 0 1 N N N N N N -11.831 -6.727  -37.932 18.259  -0.836 0.236  C14 MU4 26 
MU4 C15 C18 C 0 1 N N N N N N -11.971 -5.806  -39.137 19.471  -0.971 -0.688 C15 MU4 27 
MU4 C16 C19 C 0 1 N N N N N N -10.620 -5.369  -39.658 20.743  -1.094 0.153  C16 MU4 28 
MU4 C2  C20 C 0 1 N N N N N N -10.441 -12.204 -27.438 2.105   0.838  -0.096 C2  MU4 29 
MU4 C3  C21 C 0 1 N N N N N N -10.390 -10.698 -27.340 3.357   0.717  0.733  C3  MU4 30 
MU4 C4  C22 C 0 1 N N N N N N -10.774 -10.114 -28.694 4.569   0.581  -0.191 C4  MU4 31 
MU4 C5  C23 C 0 1 N N N N N N -11.871 -9.082  -28.492 5.841   0.458  0.650  C5  MU4 32 
MU4 C6  C24 C 0 1 N N N N N N -11.370 -7.693  -28.851 7.053   0.322  -0.274 C6  MU4 33 
MU4 C7  C25 C 0 1 N N N N N N -11.905 -7.250  -30.207 8.325   0.199  0.567  C7  MU4 34 
MU4 C8  C26 C 0 1 N N N N N N -13.405 -7.503  -30.316 9.536   0.064  -0.357 C8  MU4 35 
MU4 C9  C27 C 0 1 N N N N N N -14.000 -6.835  -31.551 10.808  -0.060 0.484  C9  MU4 36 
MU4 N1  N3  N 0 1 N N N N N N -10.517 -12.701 -28.666 0.907   0.969  0.508  N1  MU4 37 
MU4 O14 O7  O 0 1 N N N N N N -10.363 -12.900 -26.438 2.174   0.818  -1.307 O14 MU4 38 
MU4 H1  H1  H 0 1 N N N N N N -21.971 -11.421 -35.859 -10.996 -5.175 -0.231 H1  MU4 39 
MU4 H2  H2  H 0 1 N N N N N N -19.948 -12.591 -38.542 -8.404  -3.452 0.294  H2  MU4 40 
MU4 H3  H3  H 0 1 N N N N N N -18.860 -9.415  -35.039 -11.094 -0.232 0.692  H3  MU4 41 
MU4 H4  H4  H 0 1 N N N N N N -19.866 -10.662 -34.226 -9.336  -0.430 0.488  H4  MU4 42 
MU4 H5  H5  H 0 1 N N N N N N -16.868 -12.577 -32.957 -9.413  -0.611 -2.653 H5  MU4 43 
MU4 H6  H6  H 0 1 N N N N N N -18.652 -12.653 -33.159 -9.123  1.134  -2.849 H6  MU4 44 
MU4 H7  H7  H 0 1 N N N N N N -17.578 -12.825 -34.588 -8.243  0.221  -1.600 H7  MU4 45 
MU4 H8  H8  H 0 1 N N N N N N -15.608 -10.587 -33.821 -12.446 0.868  -1.141 H8  MU4 46 
MU4 H9  H9  H 0 1 N N N N N N -16.325 -10.846 -35.447 -11.642 1.311  -2.667 H9  MU4 47 
MU4 H10 H10 H 0 1 N N N N N N -16.500 -9.255  -34.631 -11.847 -0.404 -2.233 H10 MU4 48 
MU4 H11 H11 H 0 1 N N N N N N -18.057 -9.038  -32.677 -9.984  2.740  -1.297 H11 MU4 49 
MU4 H12 H12 H 0 1 N N N N N N -19.297 -10.162 -31.043 -11.335 1.713  1.059  H12 MU4 50 
MU4 H13 H13 H 0 1 N N N N N N -17.733 -11.907 -30.696 -7.565  1.829  -1.253 H13 MU4 51 
MU4 H14 H14 H 0 1 N N N N N N -15.375 -10.740 -29.399 -6.289  2.617  1.140  H14 MU4 52 
MU4 H15 H15 H 0 1 N N N N N N -16.309 -12.178 -28.864 -6.473  0.847  1.159  H15 MU4 53 
MU4 H16 H16 H 0 1 N N N N N N -15.301 -13.408 -30.882 -5.304  0.702  -1.023 H16 MU4 54 
MU4 H17 H17 H 0 1 N N N N N N -14.188 -12.009 -31.052 -5.121  2.473  -1.042 H17 MU4 55 
MU4 H18 H18 H 0 1 N N N N N N -12.860 -14.172 -30.619 -2.685  1.324  -1.147 H18 MU4 56 
MU4 H19 H19 H 0 1 N N N N N N -12.360 -14.387 -27.686 -1.409  2.112  1.246  H19 MU4 57 
MU4 H20 H20 H 0 1 N N N N N N -12.072 -15.704 -28.873 -1.593  0.342  1.265  H20 MU4 58 
MU4 H21 H21 H 0 1 N N N N N N -9.951  -14.657 -28.214 -0.424  0.197  -0.917 H21 MU4 59 
MU4 H22 H22 H 0 1 N N N N N N -10.302 -14.334 -29.946 -0.240  1.967  -0.936 H22 MU4 60 
MU4 H23 H23 H 0 1 N N N N N N -13.882 -6.469  -37.338 16.874  -1.602 -1.225 H23 MU4 61 
MU4 H24 H24 H 0 1 N N N N N N -13.571 -7.921  -38.348 17.058  0.168  -1.244 H24 MU4 62 
MU4 H25 H25 H 0 1 N N N N N N -12.159 -7.431  -32.488 12.091  0.685  -1.078 H25 MU4 63 
MU4 H26 H26 H 0 1 N N N N N N -12.635 -5.725  -32.786 11.907  -1.085 -1.059 H26 MU4 64 
MU4 H27 H27 H 0 1 N N N N N N -14.374 -6.402  -34.324 13.405  0.572  1.021  H27 MU4 65 
MU4 H28 H28 H 0 1 N N N N N N -14.160 -8.132  -33.891 13.222  -1.199 1.040  H28 MU4 66 
MU4 H29 H29 H 0 1 N N N N N N -11.691 -7.785  -34.663 14.391  -1.344 -1.142 H29 MU4 67 
MU4 H30 H30 H 0 1 N N N N N N -12.314 -6.304  -35.467 14.574  0.427  -1.161 H30 MU4 68 
MU4 H31 H31 H 0 1 N N N N N N -14.055 -8.569  -36.026 15.705  -1.458 0.957  H31 MU4 69 
MU4 H32 H32 H 0 1 N N N N N N -12.356 -8.966  -36.450 15.889  0.313  0.938  H32 MU4 70 
MU4 H33 H33 H 0 1 N N N N N N -11.152 -7.554  -38.187 18.373  0.054  0.855  H33 MU4 71 
MU4 H34 H34 H 0 1 N N N N N N -11.414 -6.157  -37.089 18.189  -1.716 0.874  H34 MU4 72 
MU4 H35 H35 H 0 1 N N N N N N -12.546 -4.916  -38.842 19.358  -1.861 -1.308 H35 MU4 73 
MU4 H36 H36 H 0 1 N N N N N N -12.507 -6.340  -39.935 19.542  -0.091 -1.327 H36 MU4 74 
MU4 H37 H37 H 0 1 N N N N N N -10.758 -4.707  -40.526 20.856  -0.205 0.773  H37 MU4 75 
MU4 H38 H38 H 0 1 N N N N N N -10.079 -4.829  -38.867 20.673  -1.975 0.792  H38 MU4 76 
MU4 H39 H39 H 0 1 N N N N N N -10.040 -6.254  -39.960 21.606  -1.191 -0.505 H39 MU4 77 
MU4 H40 H40 H 0 1 N N N N N N -9.372  -10.377 -27.072 3.471   1.606  1.352  H40 MU4 78 
MU4 H41 H41 H 0 1 N N N N N N -11.097 -10.352 -26.572 3.287   -0.164 1.371  H41 MU4 79 
MU4 H42 H42 H 0 1 N N N N N N -11.139 -10.916 -29.352 4.456   -0.309 -0.811 H42 MU4 80 
MU4 H43 H43 H 0 1 N N N N N N -9.896  -9.635  -29.152 4.640   1.462  -0.830 H43 MU4 81 
MU4 H44 H44 H 0 1 N N N N N N -12.187 -9.091  -27.438 5.954   1.348  1.269  H44 MU4 82 
MU4 H45 H45 H 0 1 N N N N N N -12.728 -9.335  -29.134 5.771   -0.423 1.288  H45 MU4 83 
MU4 H46 H46 H 0 1 N N N N N N -10.271 -7.705  -28.885 6.939   -0.567 -0.894 H46 MU4 84 
MU4 H47 H47 H 0 1 N N N N N N -11.705 -6.981  -28.083 7.123   1.203  -0.913 H47 MU4 85 
MU4 H48 H48 H 0 1 N N N N N N -11.388 -7.812  -30.998 8.438   1.089  1.187  H48 MU4 86 
MU4 H49 H49 H 0 1 N N N N N N -11.712 -6.175  -30.335 8.254   -0.681 1.206  H49 MU4 87 
MU4 H50 H50 H 0 1 N N N N N N -13.901 -7.102  -29.420 9.423   -0.826 -0.976 H50 MU4 88 
MU4 H51 H51 H 0 1 N N N N N N -13.580 -8.587  -30.377 9.607   0.944  -0.996 H51 MU4 89 
MU4 H52 H52 H 0 1 N N N N N N -14.314 -5.815  -31.285 10.738  -0.940 1.123  H52 MU4 90 
MU4 H53 H53 H 0 1 N N N N N N -14.876 -7.414  -31.880 10.922  0.830  1.104  H53 MU4 91 
MU4 H54 H54 H 0 1 N N N N N N -10.507 -12.074 -29.445 0.851   0.985  1.476  H54 MU4 92 
MU4 O1  O8  O 0 1 N N N N N N -20.528 -10.410 -37.575 -11.582 -2.952 1.331  O1  MU4 93 
# 
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 
MU4 C16 C15 SING N N 1  
MU4 C15 C14 SING N N 2  
MU4 C14 C1  SING N N 3  
MU4 O25 P24 SING N N 4  
MU4 C1  C13 SING N N 5  
MU4 P24 O27 SING N N 6  
MU4 P24 O23 SING N N 7  
MU4 C13 C12 SING N N 8  
MU4 O27 C28 SING N N 9  
MU4 C12 C11 SING N N 10 
MU4 C28 C29 SING N N 11 
MU4 C31 C29 SING N N 12 
MU4 C11 C10 SING N N 13 
MU4 C29 C30 SING N N 14 
MU4 C29 C32 SING N N 15 
MU4 C10 C9  SING N N 16 
MU4 C32 O33 SING N N 17 
MU4 C32 C34 SING N N 18 
MU4 C9  C8  SING N N 19 
MU4 C34 O35 DOUB N N 20 
MU4 C34 N36 SING N N 21 
MU4 N36 C37 SING N N 22 
MU4 C38 C37 SING N N 23 
MU4 C38 C39 SING N N 24 
MU4 C8  C7  SING N N 25 
MU4 C7  C6  SING N N 26 
MU4 N41 C39 SING N N 27 
MU4 N41 C42 SING N N 28 
MU4 C39 O40 DOUB N N 29 
MU4 C43 C42 SING N N 30 
MU4 C43 N1  SING N N 31 
MU4 C6  C5  SING N N 32 
MU4 C4  C5  SING N N 33 
MU4 C4  C3  SING N N 34 
MU4 N1  C2  SING N N 35 
MU4 C2  C3  SING N N 36 
MU4 C2  O14 DOUB N N 37 
MU4 O23 H1  SING N N 38 
MU4 O25 H2  SING N N 39 
MU4 C28 H3  SING N N 40 
MU4 C28 H4  SING N N 41 
MU4 C30 H5  SING N N 42 
MU4 C30 H6  SING N N 43 
MU4 C30 H7  SING N N 44 
MU4 C31 H8  SING N N 45 
MU4 C31 H9  SING N N 46 
MU4 C31 H10 SING N N 47 
MU4 C32 H11 SING N N 48 
MU4 O33 H12 SING N N 49 
MU4 N36 H13 SING N N 50 
MU4 C37 H14 SING N N 51 
MU4 C37 H15 SING N N 52 
MU4 C38 H16 SING N N 53 
MU4 C38 H17 SING N N 54 
MU4 N41 H18 SING N N 55 
MU4 C42 H19 SING N N 56 
MU4 C42 H20 SING N N 57 
MU4 C43 H21 SING N N 58 
MU4 C43 H22 SING N N 59 
MU4 C1  H23 SING N N 60 
MU4 C1  H24 SING N N 61 
MU4 C10 H25 SING N N 62 
MU4 C10 H26 SING N N 63 
MU4 C11 H27 SING N N 64 
MU4 C11 H28 SING N N 65 
MU4 C12 H29 SING N N 66 
MU4 C12 H30 SING N N 67 
MU4 C13 H31 SING N N 68 
MU4 C13 H32 SING N N 69 
MU4 C14 H33 SING N N 70 
MU4 C14 H34 SING N N 71 
MU4 C15 H35 SING N N 72 
MU4 C15 H36 SING N N 73 
MU4 C16 H37 SING N N 74 
MU4 C16 H38 SING N N 75 
MU4 C16 H39 SING N N 76 
MU4 C3  H40 SING N N 77 
MU4 C3  H41 SING N N 78 
MU4 C4  H42 SING N N 79 
MU4 C4  H43 SING N N 80 
MU4 C5  H44 SING N N 81 
MU4 C5  H45 SING N N 82 
MU4 C6  H46 SING N N 83 
MU4 C6  H47 SING N N 84 
MU4 C7  H48 SING N N 85 
MU4 C7  H49 SING N N 86 
MU4 C8  H50 SING N N 87 
MU4 C8  H51 SING N N 88 
MU4 C9  H52 SING N N 89 
MU4 C9  H53 SING N N 90 
MU4 N1  H54 SING N N 91 
MU4 P24 O1  DOUB N N 92 
# 
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 
MU4 SMILES           ACDLabs              12.01 "OP(OCC(C)(C(O)C(=O)NCCC(=O)NCCNC(CCCCCCCCCCCCCCC)=O)C)(=O)O"                                                                                                                                                
MU4 InChI            InChI                1.03  "InChI=1S/C27H54N3O8P/c1-4-5-6-7-8-9-10-11-12-13-14-15-16-17-23(31)28-20-21-29-24(32)18-19-30-26(34)25(33)27(2,3)22-38-39(35,36)37/h25,33H,4-22H2,1-3H3,(H,28,31)(H,29,32)(H,30,34)(H2,35,36,37)/t25-/m0/s1" 
MU4 InChIKey         InChI                1.03  KCTLTWRYJGTZMN-VWLOTQADSA-N                                                                                                                                                                                  
MU4 SMILES_CANONICAL CACTVS               3.385 "CCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCNC(=O)[C@H](O)C(C)(C)CO[P](O)(O)=O"                                                                                                                                          
MU4 SMILES           CACTVS               3.385 "CCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCNC(=O)[CH](O)C(C)(C)CO[P](O)(O)=O"                                                                                                                                           
MU4 SMILES_CANONICAL "OpenEye OEToolkits" 2.0.7 "CCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCNC(=O)[C@@H](C(C)(C)COP(=O)(O)O)O"                                                                                                                                           
MU4 SMILES           "OpenEye OEToolkits" 2.0.7 "CCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCNC(=O)C(C(C)(C)COP(=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 
MU4 "SYSTEMATIC NAME" ACDLabs              12.01 "N-[2-(hexadecanoylamino)ethyl]-N~3~-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alaninamide"                                        
MU4 "SYSTEMATIC NAME" "OpenEye OEToolkits" 2.0.7 "[(3~{R})-4-[[3-[2-(hexadecanoylamino)ethylamino]-3-oxidanylidene-propyl]amino]-2,2-dimethyl-3-oxidanyl-4-oxidanylidene-butyl] dihydrogen phosphate" 
# 
loop_
_pdbx_chem_comp_audit.comp_id 
_pdbx_chem_comp_audit.action_type 
_pdbx_chem_comp_audit.date 
_pdbx_chem_comp_audit.processing_site 
MU4 "Create component" 2019-04-15 RCSB 
MU4 "Initial release"  2020-04-22 RCSB 
MU4 "Modify PCM"       2024-09-27 PDBE 
# 
loop_
_pdbx_chem_comp_pcm.pcm_id 
_pdbx_chem_comp_pcm.comp_id 
_pdbx_chem_comp_pcm.modified_residue_id 
_pdbx_chem_comp_pcm.type 
_pdbx_chem_comp_pcm.category 
_pdbx_chem_comp_pcm.position 
_pdbx_chem_comp_pcm.polypeptide_position 
_pdbx_chem_comp_pcm.comp_id_linking_atom 
_pdbx_chem_comp_pcm.modified_residue_id_linking_atom 
_pdbx_chem_comp_pcm.uniprot_specific_ptm_accession 
_pdbx_chem_comp_pcm.uniprot_generic_ptm_accession 
1 MU4 CYS None Crosslinker "Amino-acid side chain" "Any position" C3  SG ? ? 
2 MU4 SER None Crosslinker "Amino-acid side chain" "Any position" P24 OG ? ? 
# 
