title: Different frequencies of point mutations in barley ears after treatment with N-nitroso-N-methylurea.
mesh_terms: D001467:Hordeum / Q000187:drug effects; D008770:Methylnitrosourea / Q000494:pharmacology*; D009154:Mutation; D009607:Nitrosourea Compounds / Q000494:pharmacology*; D010944:Plants / Q000187:drug effects*
chemical_list: D009607:Nitrosourea Compounds; D008770:Methylnitrosourea