BCR-ABL1 fusion (COSMIC https://cancer.sanger.ac.uk/cosmic/fusion/summary?id=1755). 5-prime end comprised of BCR exons 1-14. 3-prime end comprised of ABL1 exons 2-11.

{
  "resourceType" : "MolecularSequence",
  "id" : "sequence-example-fusion",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: MolecularSequence</b><a name=\"sequence-example-fusion\"> </a></p><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\">Resource MolecularSequence &quot;sequence-example-fusion&quot; </p></div><p><b>type</b>: rna</p><blockquote><p><b>relative</b></p><p><b>coordinateSystem</b>: 1-based character counting <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#LA30102-0)</span></p><p><b>ordinalPosition</b>: 1</p><p><b>sequenceRange</b>: 1-3234</p><h3>StartingSequences</h3><table class=\"grid\"><tr><td>-</td><td><b>Sequence[x]</b></td><td><b>WindowStart</b></td><td><b>WindowEnd</b></td></tr><tr><td>*</td><td>NM_004327.4 <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (nuccore#NM_004327.4)</span></td><td>1</td><td>3234</td></tr></table></blockquote><blockquote><p><b>relative</b></p><p><b>coordinateSystem</b>: 1-based character counting <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#LA30102-0)</span></p><p><b>ordinalPosition</b>: 2</p><p><b>sequenceRange</b>: 3235-8367</p><h3>StartingSequences</h3><table class=\"grid\"><tr><td>-</td><td><b>Sequence[x]</b></td><td><b>WindowStart</b></td><td><b>WindowEnd</b></td></tr><tr><td>*</td><td>NM_005157.6 <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (nuccore#NM_005157.6)</span></td><td>174</td><td>5306</td></tr></table></blockquote></div>"
  },
  "type" : "rna",
  "relative" : [{
    "coordinateSystem" : {
      "coding" : [{
        "system" : "http://loinc.org",
        "code" : "LA30102-0",
        "display" : "1-based character counting"
      }]
    },
    "ordinalPosition" : 1,
    "sequenceRange" : {
      "low" : {
        "value" : 1
      },
      "high" : {
        "value" : 3234
      }
    },
    "startingSequence" : {
      "sequenceCodeableConcept" : {
        "coding" : [{
          "system" : "http://www.ncbi.nlm.nih.gov/nuccore",
          "code" : "NM_004327.4"
        }]
      },
      "windowStart" : 1,
      "windowEnd" : 3234
    }
  },
  {
    "coordinateSystem" : {
      "coding" : [{
        "system" : "http://loinc.org",
        "code" : "LA30102-0",
        "display" : "1-based character counting"
      }]
    },
    "ordinalPosition" : 2,
    "sequenceRange" : {
      "low" : {
        "value" : 3235
      },
      "high" : {
        "value" : 8367
      }
    },
    "startingSequence" : {
      "sequenceCodeableConcept" : {
        "coding" : [{
          "system" : "http://www.ncbi.nlm.nih.gov/nuccore",
          "code" : "NM_005157.6"
        }]
      },
      "windowStart" : 174,
      "windowEnd" : 5306
    }
  }]
}