Codon

**Definition:** A set of three nucleotides in a protein coding sequence that specifies individual amino acids or a termination signal (CODON, TERMINATOR). Most codons are universal, but some organisms do not produce the transfer RNAs (RNA, TRANSFER) complementary to all codons. These codons are referred to as unassigned codons (CODONS, NONSENSE).

**Tree numbers:** - D13.444.735.544.355 - G05.360.335.355 - G05.360.340.024.340.137.190