title: On hypothesized selective pressure by u.v. on DNA base compositions.
mesh_terms: D000225:Adenine; D001216:Asparagine; D001483:Base Sequence; D004247:DNA / Q000528:radiation effects*; D005815:Genetic Code; D008239:Lysine; D009711:Nucleotides / Q000032:analysis*; D010649:Phenylalanine; D011830:Radiation Effects; D013941:Thymine; D014466:Ultraviolet Rays
chemical_list: D009711:Nucleotides; D010649:Phenylalanine; D001216:Asparagine; D004247:DNA; D000225:Adenine; D008239:Lysine; D013941:Thymine