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  2. DNA and RNA codon tables - Wikipedia

    en.wikipedia.org/wiki/DNA_and_RNA_codon_tables

    Three sequences, UAG, UGA, and UAA, known as stop codons, [note 1] do not code for an amino acid but instead signal the release of the nascent polypeptide from the ribosome. [7] In the standard code, the sequence AUG—read as methionine —can serve as a start codon and, along with sequences such as an initiation factor , initiates translation.

  3. Genetic code - Wikipedia

    en.wikipedia.org/wiki/Genetic_code

    For each codon (square brackets), the amino acid is given by the vertebrate mitochondrial code, either in the +1 frame for MT-ATP8 (in red) or in the +3 frame for MT-ATP6 (in blue). The MT-ATP8 genes terminates with the TAG stop codon (red dot) in the +1 frame. The MT-ATP6 gene starts with the ATG codon (blue circle for the M amino acid) in the ...

  4. List of genetic codes - Wikipedia

    en.wikipedia.org/wiki/List_of_genetic_codes

    Three translation tables have a peculiar status: Table 7 is now merged into translation table 4. Table 8 is merged to table 1; all plant chloroplast differences due to RNA edit.

  5. Reading frame - Wikipedia

    en.wikipedia.org/wiki/Reading_frame

    An open reading frame (ORF) is a reading frame that has the potential to be transcribed into RNA and translated into protein. It requires a continuous sequence of DNA which may include a start codon, through a subsequent region which has a length that is a multiple of 3 nucleotides, to a stop codon in the same reading frame.

  6. Open reading frame - Wikipedia

    en.wikipedia.org/wiki/Open_reading_frame

    The deduced amino acid sequence can be saved in various formats and searched against the sequence database using the basic local alignment search tool (BLAST) server. The ORF Finder should be helpful in preparing complete and accurate sequence submissions. It is also packaged with the Sequin sequence submission software (sequence analyser).

  7. Chargaff's rules - Wikipedia

    en.wikipedia.org/wiki/Chargaff's_rules

    The genetic code has 64 codons of which 3 function as termination codons: there are only 20 amino acids normally present in proteins. (There are two uncommon amino acids—selenocysteine and pyrrolysine—found in a limited number of proteins and encoded by the stop codons—TGA and TAG respectively.) The mismatch between the number of codons ...

  8. Synonymous substitution - Wikipedia

    en.wikipedia.org/wiki/Synonymous_substitution

    Protein translation involves a set of twenty amino acids.Each of these amino acids is coded for by a sequence of three DNA base pairs called a codon.Because there are 64 possible codons, but only 20-22 encoded amino acids (in nature) and a stop signal (i.e. up to three codons that do not code for any amino acid and are known as stop codons, indicating that translation should stop), some amino ...

  9. Start codon - Wikipedia

    en.wikipedia.org/wiki/Start_codon

    For each nucleotide triplet (square brackets), the corresponding amino acid is given (one-letter code), either in the +1 reading frame for MT-ATP8 (in red) or in the +3 frame for MT-ATP6 (in blue). In this genomic region, the two genes overlap. The start codon is the first codon of a messenger RNA (mRNA) transcript translated by a ribosome.