title: Classification and nomenclature of viruses, 1973.
mesh_terms: D004254:DNA Nucleotidyltransferases / Q000378:metabolism; D004267:DNA Viruses / Q000145:classification / Q000201:enzymology; D004279:DNA, Viral; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism; D008970:Molecular Weight; D012316:RNA Nucleotidyltransferases / Q000378:metabolism; D012328:RNA Viruses / Q000145:classification / Q000201:enzymology; D012367:RNA, Viral; D012194:RNA-Directed DNA Polymerase / Q000378:metabolism; D009626:Terminology as Topic; D014764:Viral Proteins; D014780:Viruses / Q000145:classification* / Q000201:enzymology
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral; D014764:Viral Proteins; D004254:DNA Nucleotidyltransferases; D012316:RNA Nucleotidyltransferases; D012194:RNA-Directed DNA Polymerase; D012321:DNA-Directed RNA Polymerases