<?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:obo_purl="http://purl.obolibrary.org/obo/" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:oboinowl_gen="http://www.geneontology.org/formats/oboInOwl#" xmlns:metadata_def="http://data.bioontology.org/metadata/def/"> <owl:Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_176839"> <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/CHEBI_75769"/> <rdfs:label>vitamin B3</rdfs:label> <rdfs:label rdf:datatype="http://www.w3.org/XML/1998/namespacestring">vitamin B3</rdfs:label> <skos:notation>CHEBI:176839</skos:notation> <obo_purl:IAO_0000115>Any member of a group of vitamers that belong to the chemical structural class called pyridines that exhibit biological activity against vitamin B3 deficiency. Vitamin B3 deficiency causes a condition known as pellagra whose symptoms include depression, dermatitis and diarrhea. The vitamers include nicotinic acid and nicotinamide (and their ionized and salt forms).</obo_purl:IAO_0000115> <obo_purl:IAO_0000412 rdf:resource="http://purl.obolibrary.org/obo/chebi.owl"/> <oboinowl_gen:id>CHEBI:176839</oboinowl_gen:id> <metadata_def:prefLabel>vitamin B3</metadata_def:prefLabel> <metadata_def:mappingLoom>vitaminb3</metadata_def:mappingLoom> <metadata_def:mappingSameURI rdf:resource="http://purl.obolibrary.org/obo/CHEBI_176839"/> </owl:Class> <rdf:Description rdf:about="http://purl.obolibrary.org/obo/CHEBI_15940"> <rdfs:subClassOf> <rdf:Description rdf:about="http://purl.obolibrary.org/obo/CHEBI_176839"> <metadata_def:mappingSameURI rdf:resource="http://purl.obolibrary.org/obo/CHEBI_176839"/> </rdf:Description> </rdfs:subClassOf> </rdf:Description> </rdf:RDF>