When transl_table is not equal to id 1, it is shown as a qualifier on the CDS feature. Cephalodiscidae Mitochondrial UAA-Tyr Codeīy default all transl_table in GenBank flatfiles are equal to id 1, and this is not shown.
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Candidate Division SR1 and Gracilibacteria Code The Alternative Flatworm Mitochondrial Code The Bacterial, Archaeal and Plant Plastid Code The Echinoderm and Flatworm Mitochondrial Code The Ciliate, Dasycladacean and Hexamita Nuclear Code The Mold, Protozoan, and Coelenterate Mitochondrial Code and the Mycoplasma/Spiroplasma Code The following genetic codes are described here: The current settings for each of these on the taxonomic tree can be viewed by the four buttons directly underneath the following code list. The possible intiator codons are marked as 'M' in the second ('Starts') row of the translation tables.Ĭurrently, genetic codes can be set independently for nucleus, mitochondria, plastids and hydrogenosomes. The initiator codon - whether it is AUG, CTG, TTG or something else, - is by default translated as methionine (Met, M). Thus, for the convenience of people reading GenBank records, the genetic code tables shown here use T instead of U. GenBank format by historical convention displays mRNA sequences using the DNA alphabet. Detailed information on codon usage can be found at the Codon Usage Database. The print-form ASN.1 version of this document, which includes all the genetic codes outlined below, is also available here. Listed in square brackets (under Systematic Range) are tentative assignments of a particular code based on sequence homology and/or phylogenetic relationships. The synopsis presented below is based primarily on the reviews by Osawa et al. This page summarizes and references this work.
Central to this effort is careful checking on the taxonomy of each record and assignment of the correct genetic code (shown as a /transl_table qualifier on the CDS in the flat files) for each organism and record. NCBI takes great care to ensure that the translation for each coding sequence (CDS) present in GenBank records is correct. Compiled by Andrzej (Anjay) Elzanowski and Jim Ostell at National Center for Biotechnology Information (NCBI), Bethesda, Maryland, U.S.A.