title: N-methyl-N'-nitro-N-nitrosoguanidine and hydroxylamine induced mutants of the rII region of phage T4.
mesh_terms: D015075:2-Aminopurine / Q000494:pharmacology; D002872:Chromosome Deletion; D005814:Genes, Viral; D006898:Hydroxylamines / Q000494:pharmacology*; D008769:Methylnitronitrosoguanidine / Q000494:pharmacology*; D009154:Mutation / Q000187:drug effects*; D013604:T-Phages / Q000235:genetics*
chemical_list: D006898:Hydroxylamines; D008769:Methylnitronitrosoguanidine; D015075:2-Aminopurine