Nonsenseplugin-autotooltip__default plugin-autotooltip_bigNonsense mutation: a mutation that converts a regular (amino acid-coding) codon into a stop codon. suppressor: a mutationplugin-autotooltip__default plugin-autotooltip_bigMutation: a change in the DNA of a gene that results in a change of phenotype compared to a reference wildtype allele. See also: mutant. in a tRNA geneplugin-autotooltip__default plugin-autotooltip_bigGene: read Chapters 02, 03, 04, 05, and 06 for a definition of gene :-) wherein the anticodon loop sequenceplugin-autotooltip__default plugin-autotooltip_bigSequence: the precise order of monomers in a polymer. In DNA, it refers to the order of G, A, T, and C nucleotides. In RNA, it refers to the order of G, A, U, and C nucleotides. In proteins, it refers to the order of amino acids. has mutated such that it is complementary to a stop codonplugin-autotooltip__default plugin-autotooltip_bigStop codon: a codon that instructs the ribosome to terminate translation. Stop codons are UGA, UAG, or UAA in the universal genetic code.. This has the effect of being able to suppress some nonsenseplugin-autotooltip__default plugin-autotooltip_bigNonsense mutation: a mutation that converts a regular (amino acid-coding) codon into a stop codon. mutationsplugin-autotooltip__default plugin-autotooltip_bigMutation: a change in the DNA of a gene that results in a change of phenotype compared to a reference wildtype allele. See also: mutant..