Genetic code limit organisms--do they exist?
D000227:Adenine Nucleotides / Q000032:analysis; D000818:Animals; D001483:Base Sequence; D003597:Cytosine Nucleotides / Q000032:analysis; D004247:DNA / Q000032:analysis*; D005796:Genes; D005815:Genetic Code; D006150:Guanine Nucleotides / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D013769:Tetrahymena pyriformis / Q000032:analysis*; D013942:Thymine Nucleotides / Q000032:analysis
D000227:Adenine Nucleotides; D003597:Cytosine Nucleotides; D006150:Guanine Nucleotides; D013942:Thymine Nucleotides; D004247:DNA