Computer Retrieval of Information on Scientific Projects Thesaurus HIVMutation Source
http://www.semanticweb.org/ontologies/2015/1/Ontology1423442513400.owl#Purine http://purl.bioontology.org/ontology/CSP/2503-2645 LOOM
http://www.semanticweb.org/ontologies/2015/1/Ontology1423442513400.owl#Pyrimidine http://purl.bioontology.org/ontology/CSP/2517-4993 LOOM
http://www.semanticweb.org/ontologies/2015/1/Ontology1423442513400.owl#Intron http://purl.bioontology.org/ontology/CSP/4006-0053 LOOM