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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.
Comparison of alternative translation tables for all codons (using IUPAC amino acid codes): Amino-acid biochemical properties Nonpolar Polar Basic Acidic
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.
The two other start codons listed by table 1 (GTG and TTG) are rare in eukaryotes. 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 article ...
Grouping of codons by amino acid residue molar volume and hydropathicity. A more detailed version is available. Axes 1, 2, 3 are the first, second, and third positions in the codon. The 20 amino acids and stop codons (X) are shown in single letter code. Degeneracy is the redundancy of the genetic code. This term was given by Bernfield and ...
English: Codons sun ("codesonne" in german); shows which base sequence encodes which amino acid; vectorized from png file Français : Le soleil à codons ("codesonne" en allemand); montrant le Code génétique sous une forme originale.
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