On the origin of the genes for neoplasia: G.H.A. Clowes memorial lecture.

Alpharetrovirus Animals Cell Differentiation Cell Transformation, Neoplastic Chickens DNA Nucleotidyltransferases/metabolism DNA-Directed RNA Polymerases/metabolism Ducks Genotype Lymphatic Diseases/microbiology Models, Biological Mutation Neoplasms/etiology,genetics Nucleic Acid Hybridization Oncogenic Viruses/enzymology Protein Biosynthesis RNA Viruses/enzymology Virus Replication

DNA Nucleotidyltransferases DNA-Directed RNA Polymerases