<?xml version="1.0" encoding="UTF-8"?><CodeSystem xmlns="http://hl7.org/fhir"><id value="nucleotide-terminus"/><meta><lastUpdated value="2026-06-23T16:20:19.822+00:00"/></meta><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem nucleotide-terminus</b></p><a name="nucleotide-terminus"> </a><a name="hcnucleotide-terminus"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/nucleotide-terminus</code> defines the following codes:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">A<a name="nucleotide-terminus-A"> </a></td><td>Adenosine</td><td>Adenosine (A).</td></tr><tr><td style="white-space:nowrap">T<a name="nucleotide-terminus-T"> </a></td><td>Thymidine</td><td>Thymidine (T).</td></tr><tr><td style="white-space:nowrap">C<a name="nucleotide-terminus-C"> </a></td><td>Cytidine</td><td>Cytidine (C).</td></tr><tr><td style="white-space:nowrap">G<a name="nucleotide-terminus-G"> </a></td><td>Guanosine</td><td>Guanosine (G).</td></tr><tr><td style="white-space:nowrap">U<a name="nucleotide-terminus-U"> </a></td><td>Uridine</td><td>Uridine (U).</td></tr></table></div></text><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"><valueCode value="brr"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"><valueCode value="informative"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm"><valueInteger value="1"/></extension><url value="http://hl7.org/fhir/nucleotide-terminus"/><version value="6.0.0-ballot4"/><name value="NucleotideTerminusExample"/><title value="Nucleotide Terminus"/><status value="active"/><experimental value="true"/><date value="2026-06-19"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="The nucleotide present at a sequence terminus (5′ or 3′)."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/nucleotide-terminus"/><content value="complete"/><concept><code value="A"/><display value="Adenosine"/><definition value="Adenosine (A)."/></concept><concept><code value="T"/><display value="Thymidine"/><definition value="Thymidine (T)."/></concept><concept><code value="C"/><display value="Cytidine"/><definition value="Cytidine (C)."/></concept><concept><code value="G"/><display value="Guanosine"/><definition value="Guanosine (G)."/></concept><concept><code value="U"/><display value="Uridine"/><definition value="Uridine (U)."/></concept></CodeSystem>