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A codon table can be used to translate a genetic code into a sequence of amino acids. [1] [2] The standard genetic code is traditionally represented as an RNA codon table, because when proteins are made in a cell by ribosomes, it is messenger RNA (mRNA) that directs protein synthesis. [2] [3] The mRNA sequence is determined by the sequence of ...
The Enterosoma code [3] The Peptacetobacter code [3] The Anaerococcus and Onthovivens code [3] The Absconditabacterales code [3] The alternative translation tables (2 to 37) involve codon reassignments that are recapitulated in the DNA and RNA codon tables.
The two other start codons listed by table 1 (GTG and TTG) are rare in eukaryotes. [3] Prokaryotes have less strigent start codon requirements; they are described by NCBI table 11 . B ^ ^ ^ The historical basis for designating the stop codons as amber, ochre and opal is described in an autobiography by Sydney Brenner [ 4 ] and in a historical ...
With some exceptions, [1] a three-nucleotide codon in a nucleic acid sequence specifies a single amino acid. The vast majority of genes are encoded with a single scheme (see the RNA codon table ). That scheme is often referred to as the canonical or standard genetic code, or simply the genetic code, though variant codes (such as in mitochondria ...
This is the standard genetic code (NCBI table 1), in amino acid→codon form. By default it is the DNA code; for the RNA code (using Uracil rather than Thymine), add template parameter "T=U". Also listed are the compressed codon forme, using IUPAC nucleic acid notation. It's referenced in a couple of places, so have a single master copy.
Since there are 4 bases in 3-letter combinations, there are 64 possible codons (4 3 combinations). These encode the twenty standard amino acids, giving most amino acids more than one possible codon. There are also three 'stop' or 'nonsense' codons signifying the end of the coding region; these are the TAG, TAA, and TGA codons, (UAG, UAA, and ...
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Each group of three bases, called a codon, corresponds to a single amino acid, and there is a specific genetic code by which each possible combination of three bases corresponds to a specific amino acid. The central dogma of molecular biology outlines the mechanism by which proteins are constructed using information contained in nucleic acids.
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