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      "num_nts": 5,
      "nts_short": "GAGUU",
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        {
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        0
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        5
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      "num_nts": 5,
      "nts_short": "CGUAG",
      "nts_long": "///A/173,///A/174,///A/175,///A/270,///A/271",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 1,
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        {
          "index": 2,
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          "nts_short": "",
          "nts_long": ""
        }
      ]
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        1
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      "num_nts": 6,
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      "nts_long": "///A/176,///A/177,///A/178,///A/267,///A/268,///A/269",
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        {
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        2
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        6
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      "num_nts": 8,
      "nts_short": "AUCUAGAU",
      "nts_long": "///A/178,///A/179,///A/180,///A/181,///A/264,///A/265,///A/266,///A/267",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
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          "nts_short": "UC",
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        {
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          "nts_short": "GA",
          "nts_long": "///A/265,///A/266"
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        2
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        3
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      "num_nts": 9,
      "nts_short": "GGACAUCCC",
      "nts_long": "///A/159,///A/160,///A/161,///A/162,///A/163,///A/279,///A/280,///A/281,///A/282",
      "num_stems": 2,
      "bridges": [
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          "index": 1,
          "num_nts": 3,
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          "nts_long": "///A/160,///A/161,///A/162"
        },
        {
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          "nts_short": "CC",
          "nts_long": "///A/280,///A/281"
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        2
      ],
      "stem_indices": [
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        4
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      "num_nts": 9,
      "nts_short": "GUAACGCCU",
      "nts_long": "///A/167,///A/168,///A/169,///A/170,///A/171,///A/273,///A/274,///A/275,///A/276",
      "num_stems": 2,
      "bridges": [
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        4
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        9
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      "num_nts": 11,
      "nts_short": "GCUUAUGUUGC",
      "nts_long": "///A/192,///A/193,///A/194,///A/195,///A/196,///A/209,///A/210,///A/211,///A/212,///A/213,///A/214",
      "num_stems": 2,
      "bridges": [
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          "index": 1,
          "num_nts": 3,
          "nts_short": "CUU",
          "nts_long": "///A/193,///A/194,///A/195"
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        {
          "index": 2,
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          "nts_short": "GUUG",
          "nts_long": "///A/210,///A/211,///A/212,///A/213"
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      "index": 6,
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        4
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      "stem_indices": [
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        -3
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      "summary": "[2] 4 4 [A.233 A.247 A.238 A.242] 2 1",
      "num_nts": 12,
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      "nts_long": "///A/233,///A/234,///A/235,///A/236,///A/237,///A/238,///A/242,///A/243,///A/244,///A/245,///A/246,///A/247",
      "num_stems": 2,
      "bridges": [
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          "nts_short": "UAGG",
          "nts_long": "///A/234,///A/235,///A/236,///A/237"
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        6
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        2
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      "num_nts": 13,
      "nts_short": "UGACAUGGUUUCA",
      "nts_long": "///A/154,///A/155,///A/156,///A/157,///A/158,///A/283,///A/284,///A/285,///A/286,///A/287,///A/288,///A/289,///A/290",
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      "residue_pair": "nt:nt"
    },
    {
      "index": 77,
      "atom1_serNum": 1055,
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      "donAcc_type": "questionable",
      "distance": 3.365,
      "atom1_id": "///A/199/N1",
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    {
      "index": 79,
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      "atom1_id": "///A/202/O2'",
      "atom2_id": "///A/203/O5'",
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      "residue_pair": "nt:nt"
    },
    {
      "index": 81,
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      "atom1_id": "///A/204/O2'",
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      "residue_pair": "nt:nt"
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      "distance": 2.801,
      "atom1_id": "///A/219/O2'",
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      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
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      "atom1_id": "///A/219/N2",
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    {
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      "atom1_id": "///A/222/O2'",
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      "residue_pair": "nt:nt"
    },
    {
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      "distance": 3.026,
      "atom1_id": "///A/223/O3'",
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      "distance": 3.996,
      "atom1_id": "///A/228/N3",
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      "residue_pair": "nt:nt"
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      "donAcc_type": "standard",
      "distance": 3.422,
      "atom1_id": "///A/230/N3",
      "atom2_id": "///A/250/N2",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
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      "atom1_serNum": 1743,
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      "donAcc_type": "acceptable",
      "distance": 3.191,
      "atom1_id": "///A/232/O2'",
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      "atom1_id": "///A/232/O2",
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      "residue_pair": "nt:nt"
    },
    {
      "index": 92,
      "atom1_serNum": 1763,
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      "donAcc_type": "acceptable",
      "distance": 3.100,
      "atom1_id": "///A/233/O2'",
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      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 93,
      "atom1_serNum": 1767,
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      "donAcc_type": "standard",
      "distance": 3.329,
      "atom1_id": "///A/233/O2",
      "atom2_id": "///A/247/N1",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 94,
      "atom1_serNum": 1787,
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      "donAcc_type": "standard",
      "distance": 3.723,
      "atom1_id": "///A/234/O2",
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      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 95,
      "atom1_serNum": 1810,
      "atom2_serNum": 2044,
      "donAcc_type": "questionable",
      "distance": 3.115,
      "atom1_id": "///A/235/N6",
      "atom2_id": "///A/246/N2",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 96,
      "atom1_serNum": 1856,
      "atom2_serNum": 1981,
      "donAcc_type": "standard",
      "distance": 3.924,
      "atom1_id": "///A/237/N1",
      "atom2_id": "///A/243/O4",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 97,
      "atom1_serNum": 1856,
      "atom2_serNum": 2001,
      "donAcc_type": "questionable",
      "distance": 3.262,
      "atom1_id": "///A/237/N1",
      "atom2_id": "///A/244/N4",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 98,
      "atom1_serNum": 1858,
      "atom2_serNum": 1999,
      "donAcc_type": "standard",
      "distance": 2.991,
      "atom1_id": "///A/237/N2",
      "atom2_id": "///A/244/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 99,
      "atom1_serNum": 1875,
      "atom2_serNum": 1959,
      "donAcc_type": "standard",
      "distance": 2.480,
      "atom1_id": "///A/238/O2",
      "atom2_id": "///A/242/N1",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 100,
      "atom1_serNum": 1875,
      "atom2_serNum": 1979,
      "donAcc_type": "standard",
      "distance": 3.537,
      "atom1_id": "///A/238/O2",
      "atom2_id": "///A/243/N3",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 101,
      "atom1_serNum": 1876,
      "atom2_serNum": 1958,
      "donAcc_type": "standard",
      "distance": 2.747,
      "atom1_id": "///A/238/N3",
      "atom2_id": "///A/242/O6",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 102,
      "atom1_serNum": 1891,
      "atom2_serNum": 1923,
      "donAcc_type": "acceptable",
      "distance": 3.403,
      "atom1_id": "///A/239/O2'",
      "atom2_id": "///A/241/OP2",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 103,
      "atom1_serNum": 1951,
      "atom2_serNum": 1970,
      "donAcc_type": "acceptable",
      "distance": 3.036,
      "atom1_id": "///A/242/O2'",
      "atom2_id": "///A/243/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 104,
      "atom1_serNum": 1974,
      "atom2_serNum": 1990,
      "donAcc_type": "acceptable",
      "distance": 3.027,
      "atom1_id": "///A/243/O2'",
      "atom2_id": "///A/244/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 105,
      "atom1_serNum": 2146,
      "atom2_serNum": 2202,
      "donAcc_type": "acceptable",
      "distance": 2.590,
      "atom1_id": "///A/251/O2'",
      "atom2_id": "///A/254/OP1",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 106,
      "atom1_serNum": 2146,
      "atom2_serNum": 2223,
      "donAcc_type": "acceptable",
      "distance": 3.564,
      "atom1_id": "///A/251/O2'",
      "atom2_id": "///A/255/OP2",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 107,
      "atom1_serNum": 2196,
      "atom2_serNum": 2393,
      "donAcc_type": "standard",
      "distance": 2.919,
      "atom1_id": "///A/253/N6",
      "atom2_id": "///A/262/O4",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 108,
      "atom1_serNum": 2197,
      "atom2_serNum": 2391,
      "donAcc_type": "standard",
      "distance": 3.121,
      "atom1_id": "///A/253/N1",
      "atom2_id": "///A/262/N3",
      "atom_pair": "N:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 109,
      "atom1_serNum": 2215,
      "atom2_serNum": 2371,
      "donAcc_type": "standard",
      "distance": 3.552,
      "atom1_id": "///A/254/O2",
      "atom2_id": "///A/261/N1",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 110,
      "atom1_serNum": 2218,
      "atom2_serNum": 2393,
      "donAcc_type": "standard",
      "distance": 3.897,
      "atom1_id": "///A/254/N4",
      "atom2_id": "///A/262/O4",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 111,
      "atom1_serNum": 2235,
      "atom2_serNum": 2347,
      "donAcc_type": "questionable",
      "distance": 2.980,
      "atom1_id": "///A/255/O2",
      "atom2_id": "///A/260/O6",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 112,
      "atom1_serNum": 2251,
      "atom2_serNum": 2300,
      "donAcc_type": "acceptable",
      "distance": 3.928,
      "atom1_id": "///A/256/O2'",
      "atom2_id": "///A/258/N7",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    },
    {
      "index": 113,
      "atom1_serNum": 2261,
      "atom2_serNum": 2310,
      "donAcc_type": "standard",
      "distance": 2.445,
      "atom1_id": "///A/256/N2",
      "atom2_id": "///A/259/OP2",
      "atom_pair": "N:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 114,
      "atom1_serNum": 2473,
      "atom2_serNum": 2491,
      "donAcc_type": "acceptable",
      "distance": 3.299,
      "atom1_id": "///A/266/O2'",
      "atom2_id": "///A/267/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 115,
      "atom1_serNum": 2814,
      "atom2_serNum": 2830,
      "donAcc_type": "acceptable",
      "distance": 3.264,
      "atom1_id": "///A/282/O2'",
      "atom2_id": "///A/283/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 116,
      "atom1_serNum": 2834,
      "atom2_serNum": 2850,
      "donAcc_type": "acceptable",
      "distance": 3.066,
      "atom1_id": "///A/283/O2'",
      "atom2_id": "///A/284/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 117,
      "atom1_serNum": 2854,
      "atom2_serNum": 2873,
      "donAcc_type": "acceptable",
      "distance": 3.008,
      "atom1_id": "///A/284/O2'",
      "atom2_id": "///A/285/O4'",
      "atom_pair": "O:O",
      "residue_pair": "nt:nt"
    },
    {
      "index": 118,
      "atom1_serNum": 2884,
      "atom2_serNum": 2945,
      "donAcc_type": "standard",
      "distance": 3.431,
      "atom1_id": "///A/285/O6",
      "atom2_id": "///A/288/N3",
      "atom_pair": "O:N",
      "residue_pair": "nt:nt"
    }
  ],
  "refCoords": {
    "purine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -0.5000   0.4000",
      "    3 N      -2.2500  -0.5000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500  -0.5000   0.4000",
      "    7 C       1.2500  -0.5000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -0.5000   0.4000",
      "   11 C      -2.2500  -0.5000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "pyrimidine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500   1.0000   0.4000",
      "    3 N      -2.2500   1.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500   1.0000   0.4000",
      "    7 C       1.2500   1.0000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500   1.0000   0.4000",
      "   11 C      -2.2500   1.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "wc_pair": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -5.0000   0.4000",
      "    3 N      -2.2500  -5.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       2.2500   5.0000   0.4000",
      "    6 C       2.2500  -5.0000   0.4000",
      "    7 C       2.2500  -5.0000  -0.4000",
      "    8 C       2.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -5.0000   0.4000",
      "   11 C      -2.2500  -5.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ]
  },
  "metadata": {
    "license": "http://innovation.columbia.edu/technologies/CU20391",
    "url": "http://x3dna.org/",
    "url_alt": "http://home.x3dna.org/",
    "forum": "http://forum.x3dna.org/",
    "citation": "Lu et al. (2015). 'DSSR: an integrated software tool for dissecting the spatial structure of RNA.' Nucleic Acids Res., 43(21):e142 [doi:10.1093/nar/gkv716].",
    "str_id": "8qo5",
    "num_naChains": 1,
    "naChains": "A=145",
    "num_atoms": 3078,
    "num_waters": 0,
    "num_notes": 52,
    "notes": [
      {
        "Aminors": "A-minor interactions (including types I and II)"
      },
      {
        "Cstem_index": "stem index of the 'Canonical' helix in k-turn"
      },
      {
        "Cstem_pair": "Cstem bp delineating the k-turn internal loop"
      },
      {
        "Dp": "perpendicular distance of the 3' P atom to the glycosidic bond"
      },
      {
        "GA_pair": "sheared G-A pair in k-turn"
      },
      {
        "HtypePknot": "H-type pseudoknot"
      },
      {
        "Kturn": "kink-turn (k-turn)"
      },
      {
        "LW": "Leontis-Westhof"
      },
      {
        "NCstem_index": "stem index of the 'Non-Canonical' helix in k-turn"
      },
      {
        "NCstem_pair": "NCstem bp delineating the k-turn internal loop"
      },
      {
        "Uturn": "U-turn of the UNR- or GNRA-type"
      },
      {
        "aa": "amino acid"
      },
      {
        "atom_pair": "symbols of the two atoms involved in an H-bond"
      },
      {
        "auxfiles": "auxiliary files"
      },
      {
        "glyco_bond": "conformation of base related to sugar (syn or anti)"
      },
      {
        "bb_type": "backbone conformation, BI or BII"
      },
      {
        "bending_angle": "angle between two helical axes"
      },
      {
        "bp": "base pair"
      },
      {
        "bseq": "base sequence in one-letter code"
      },
      {
        "bulge": "bulge loop"
      },
      {
        "coaxStacks": "coaxial stacking of stems within a helix"
      },
      {
        "dbn": "dot bracket notation"
      },
      {
        "desc": "description"
      },
      {
        "donAcc_type": "donor/acceptor type of the atom pair in an H-bond"
      },
      {
        "epsilon_zeta": "difference between epsilon and zeta torsion angles"
      },
      {
        "hairpin": "hairpin loop"
      },
      {
        "hbond": "hydrogen bond (H-bond)"
      },
      {
        "helix": "defined by base-stacking interactions, regardless of bp type and backbone connectivity"
      },
      {
        "id": "identifier"
      },
      {
        "iloop": "internal loop"
      },
      {
        "index": "serial number"
      },
      {
        "isoCanonPairs": "isolated canonical pairs"
      },
      {
        "junction": "(multi-branched) junction loop"
      },
      {
        "kissingLoop": "kissing loop"
      },
      {
        "multiplet": "3+ bases in a coplanar geometry"
      },
      {
        "na": "nucleic acid"
      },
      {
        "nonPair": "two nts not forming a pair, but with H-bonding/stacking interactions"
      },
      {
        "nonStack": "nucleotide not involved in stacking interactions"
      },
      {
        "nt": "nucleotide"
      },
      {
        "num": "number"
      },
      {
        "oArea": "overlap areas between two bases, including exocyclic atoms"
      },
      {
        "oArea_ring": "overlap areas between two bases, including only ring atoms"
      },
      {
        "phosContacts": "H-bonding and atom-capping interactions involving a phosphate"
      },
      {
        "residue_pair": "types of the two residues involved in an H-bond"
      },
      {
        "rmsd": "root-mean-squares deviation"
      },
      {
        "serNum": "serial number"
      },
      {
        "ssSegments": "single-stranded segments not involved in loops"
      },
      {
        "ssZp": "Z-coordinate of the 3' phosphorus atom with reference to the 5' base plane"
      },
      {
        "sstr": "secondary structure in dbn"
      },
      {
        "stem": "helix consisting of only canonical pairs, with a continuous backbone"
      },
      {
        "str_id": "structure identifier, derived from inpfile with extension removed"
      },
      {
        "vert_dist": "vertical distance from an atom to a base plane"
      }
    ],
    "num_auxfiles": 19,
    "auxfiles": [
      {
        "index": 1,
        "name": "dssr-pairs.pdb",
        "desc": "an ensemble of base pairs"
      },
      {
        "index": 2,
        "name": "dssr-multiplets.pdb",
        "desc": "an ensemble of multiplets"
      },
      {
        "index": 3,
        "name": "dssr-stems.pdb",
        "desc": "an ensemble of stems"
      },
      {
        "index": 4,
        "name": "dssr-helices.pdb",
        "desc": "an ensemble of helices (coaxial stacking)"
      },
      {
        "index": 5,
        "name": "dssr-hairpins.pdb",
        "desc": "an ensemble of hairpin loops"
      },
      {
        "index": 6,
        "name": "dssr-bulges.pdb",
        "desc": "an ensemble of bulges"
      },
      {
        "index": 7,
        "name": "dssr-iloops.pdb",
        "desc": "an ensemble of internal loops"
      },
      {
        "index": 8,
        "name": "dssr-junctions.pdb",
        "desc": "an ensemble of junctions (multi-branch)"
      },
      {
        "index": 9,
        "name": "dssr-2ndstrs.bpseq",
        "desc": "secondary structure in bpseq format"
      },
      {
        "index": 10,
        "name": "dssr-2ndstrs.ct",
        "desc": "secondary structure in connectivity table format"
      },
      {
        "index": 11,
        "name": "dssr-2ndstrs.dbn",
        "desc": "secondary structure in dot-bracket notation"
      },
      {
        "index": 12,
        "name": "dssr-torsions.txt",
        "desc": "backbone torsion angles and suite names"
      },
      {
        "index": 13,
        "name": "dssr-splays.pdb",
        "desc": "an ensemble of splayed-apart units"
      },
      {
        "index": 14,
        "name": "dssr-stacks.pdb",
        "desc": "an ensemble of base stacks"
      },
      {
        "index": 15,
        "name": "dssr-atom2bases.pdb",
        "desc": "an ensemble of atom-base stacking interactions"
      },
      {
        "index": 16,
        "name": "dssr-rotmat.txt",
        "desc": "position vector and rotation matrix"
      },
      {
        "index": 17,
        "name": "dssr-viewV.pdb",
        "desc": "vertical view of the principal moment of inertia"
      },
      {
        "index": 18,
        "name": "dssr-viewH.pdb",
        "desc": "horizontal view of the principal moment of inertia"
      },
      {
        "index": 19,
        "name": "dssr-viewT.pdb",
        "desc": "top view of the principal moment of inertia"
      }
    ],
    "time_used": "999"
  }
}
