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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 genetic code was once believed to be universal: [21] a codon would code for the same amino acid regardless of the organism or source. However, it is now agreed that the genetic code evolves, [22] resulting in discrepancies in how a codon is translated depending on the genetic source.
The genetic code is highly similar among all organisms and can be expressed in a simple table with 64 entries. The codons specify which amino acid will be added next during protein biosynthesis. With some exceptions, [1] a three-nucleotide codon in a nucleic acid sequence specifies a single amino acid.
The 20 amino acids that are encoded directly by the codons of the universal genetic code are called standard or canonical amino acids. A modified form of methionine ( N -formylmethionine ) is often incorporated in place of methionine as the initial amino acid of proteins in bacteria, mitochondria and plastids (including chloroplasts).
This is the standard or universal genetic code. This table is found in both DNA Codon Table and Genetic Code (And probably a few other places), so I'm pulling it out so it can be common. By default it's the DNA code (using the letter T for Thymine); use template parameter "T=U" to make it the RNA code (using U for Uracil).
Four novel alternative genetic codes were discovered in bacterial genomes by Shulgina and Eddy using their codon assignment software Codetta, and validated by analysis of tRNA anticodons and identity elements; [3] these codes are not currently adopted at NCBI, but are numbered here 34-37, and specified in the table below. The standard code
2010-09-21 00:06 Chirigami 579×749 (400352 bytes) The "Hot to use" text can't be reasonably fixed. However it doesn't have such relevant information. It could be included in the description. The text states: "How to use this chart: This chart will enable you to identify an amino acid from a single codo
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