Medical Dictionary

start codon

noun

medical Definition of start codon

:a genetic codon in messenger RNA that stimulates the binding of a transfer RNA which starts protein synthesis
  • … the AUG codon for methionine functions as the start codon in the vast majority of mRNAs.
  • —Harvey Lodish et al., Molecular Cell Biology, 6th edition2007
called also initiation codon; compare stop codon

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