Data quality metrics extracted from 4u4n.cif.gz by aB_cif2table1 from BUSTER (Global Phasing Ltd.). See also the PDBx/mmCIF dictionary.

Raw JSON data
{
  "mxlims_type": "ReflectionSet",
  "version": "0.2.2",
  "uuid": "c8ea7e3050245b1a9099496414500cbf",
  "space_group_name": "P 1 21 1",
  "unit_cell": {
    "a": 434.77,
    "b": 287.66,
    "c": 303.84,
    "alpha": 90.00,
    "beta": 98.99,
    "gamma": 90.00
  },
  "wavelengths": [1.00000],
  "anisotropic_diffraction": false,
  "overall_refln_statistics": {
    "resolution_limits": [73.95,3.100],
    "number_observations": 12947660,
    "number_observations_unique": 1329717,
    "quality_factors": [
      {
        "type": "R(merge)",
        "value": 0.411
      },
      {
        "type": "R(meas)",
        "value": 0.432
      },
      {
        "type": "I/SigI",
        "value": 6.520
      },
      {
        "type": "Completeness",
        "value": 100.000
      },
      {
        "type": "Redundancy",
        "value": 5.20
      }
    ]
  },
  "refln_shells": [
    {
      "resolution_limits": [3.200,3.100],
      "number_observations": 626671,
      "number_observations_unique": 120500,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 1.788
        },
        {
          "type": "R(meas)",
          "value": 1.997
        },
        {
          "type": "I/SigI",
          "value": 0.880
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [3.300,3.200],
      "number_observations": 562633,
      "number_observations_unique": 106350,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 1.336
        },
        {
          "type": "R(meas)",
          "value": 1.488
        },
        {
          "type": "I/SigI",
          "value": 1.190
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [3.400,3.300],
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      "number_observations_unique": 94219,
      "quality_factors": [
        {
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          "value": 1.057
        },
        {
          "type": "R(meas)",
          "value": 1.185
        },
        {
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          "value": 1.490
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [3.500,3.400],
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      "number_observations_unique": 83768,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.840
        },
        {
          "type": "R(meas)",
          "value": 0.935
        },
        {
          "type": "I/SigI",
          "value": 1.910
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [3.600,3.500],
      "number_observations": 894277,
      "number_observations_unique": 74711,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 1.659
        },
        {
          "type": "R(meas)",
          "value": 1.732
        },
        {
          "type": "I/SigI",
          "value": 2.470
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [3.700,3.600],
      "number_observations": 789019,
      "number_observations_unique": 66887,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 1.349
        },
        {
          "type": "R(meas)",
          "value": 1.409
        },
        {
          "type": "I/SigI",
          "value": 2.990
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [3.800,3.700],
      "number_observations": 678378,
      "number_observations_unique": 60026,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 1.108
        },
        {
          "type": "R(meas)",
          "value": 1.160
        },
        {
          "type": "I/SigI",
          "value": 3.570
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [3.900,3.800],
      "number_observations": 639869,
      "number_observations_unique": 54041,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.935
        },
        {
          "type": "R(meas)",
          "value": 0.977
        },
        {
          "type": "I/SigI",
          "value": 4.310
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [4.000,3.900],
      "number_observations": 584433,
      "number_observations_unique": 48855,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.818
        },
        {
          "type": "R(meas)",
          "value": 0.853
        },
        {
          "type": "I/SigI",
          "value": 4.930
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [4.200,4.000],
      "number_observations": 976369,
      "number_observations_unique": 84131,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.687
        },
        {
          "type": "R(meas)",
          "value": 0.718
        },
        {
          "type": "I/SigI",
          "value": 5.760
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [4.400,4.200],
      "number_observations": 820138,
      "number_observations_unique": 69718,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.559
        },
        {
          "type": "R(meas)",
          "value": 0.584
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        {
          "type": "I/SigI",
          "value": 6.940
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [4.600,4.400],
      "number_observations": 695321,
      "number_observations_unique": 58004,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.472
        },
        {
          "type": "R(meas)",
          "value": 0.492
        },
        {
          "type": "I/SigI",
          "value": 8.170
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [5.000,4.600],
      "number_observations": 1038391,
      "number_observations_unique": 90108,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.385
        },
        {
          "type": "R(meas)",
          "value": 0.402
        },
        {
          "type": "I/SigI",
          "value": 9.450
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [8.000,5.000],
      "number_observations": 2832332,
      "number_observations_unique": 240229,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.253
        },
        {
          "type": "R(meas)",
          "value": 0.264
        },
        {
          "type": "I/SigI",
          "value": 12.820
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [10.000,8.000],
      "number_observations": 436803,
      "number_observations_unique": 38010,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.148
        },
        {
          "type": "R(meas)",
          "value": 0.155
        },
        {
          "type": "I/SigI",
          "value": 18.970
        },
        {
          "type": "Completeness",
          "value": 100.000
        }
      ]
    },
    {
      "resolution_limits": [40.000,10.000],
      "number_observations": 447469,
      "number_observations_unique": 39634,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.111
        },
        {
          "type": "R(meas)",
          "value": 0.116
        },
        {
          "type": "I/SigI",
          "value": 24.060
        },
        {
          "type": "Completeness",
          "value": 99.900
        }
      ]
    },
    {
      "resolution_limits": [75.000,40.000],
      "number_observations": 1998,
      "number_observations_unique": 526,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.041
        },
        {
          "type": "R(meas)",
          "value": 0.048
        },
        {
          "type": "I/SigI",
          "value": 24.110
        },
        {
          "type": "Completeness",
          "value": 92.600
        }
      ]
    },
    {
      "resolution_limits": [73.95,75.000],
      "quality_factors": [

      ]
    }
  ]

}
  

Table 1 generated from MXLIMS-JSON (via JavaScript):


Binned data generated from MXLIMS-JSON (via JavaScript):