---
type: "example"
title: "MolecularDefinition Example: moleculardefinition-example-variation-cyp2c19-991-hgvs"
resource: "MolecularDefinition"
example: "moleculardefinition-example-variation-cyp2c19-991-hgvs"
---
# MolecularDefinition Example: moleculardefinition-example-variation-cyp2c19-991-hgvs

## Example XML



```xml
<?xml version="1.0" encoding="UTF-8"?>
<MolecularDefinition xmlns="http://hl7.org/fhir">
    <id value="example-variation-cyp2c19-991-hgvs"/>
    <moleculeType>
        <coding>
            <system value="http://hl7.org/fhir/sequence-type"/>
            <code value="dna"/>
            <display value="DNA Sequence"/>
        </coding>
    </moleculeType>
    <location>
        <sequenceLocation>
            <sequenceContext>
                <reference value="MolecularDefinition/example-sequence-nm0007694-url"/>
                <type value="MolecularDefinition"/>
                <display value="Starting Sequence Resource: (CYP2C19), mRNA, NM_000769.4"/>
            </sequenceContext>
            <coordinateInterval>
                <coordinateSystem>
                    <system>
                        <coding>
                            <system value="http://loinc.org"/>
                            <code value="LA30100-4"/>
                            <display value="0-based interval counting"/>
                        </coding>
                        <text value="0-based interval counting"/>
                    </system>
                </coordinateSystem>
                <startQuantity>
                    <value value="1015"/>
                </startQuantity>
                <endQuantity>
                    <value value="1016"/>
                </endQuantity>
            </coordinateInterval>
        </sequenceLocation>
    </location>
    <representation>
        <focus>
            <coding>
                <code value="reference-state"/>
                <display value="Reference State"/>
            </coding>
        </focus>
        <code>
            <coding>
                <system value="http://varnomen.hgvs.org"/>
                <code value="NM_000769.4:c.991A>G"/>
                <display value="NM_000769.4:c.991A>G"/>
            </coding>
        </code>
        <literal>
            <value value="A"/>
        </literal>
    </representation>
    <representation>
        <focus>
            <coding>
                <code value="alternative-state"/>
                <display value="Alternative State"/>
            </coding>
        </focus>
        <code>
            <coding>
                <system value="http://varnomen.hgvs.org"/>
                <code value="NM_000769.4:c.991A>G"/>
                <display value="NM_000769.4:c.991A>G"/>
            </coding>
        </code>
        <literal>
            <value value="G"/>
        </literal>
    </representation>

</MolecularDefinition>
```