Related Words

Codon: A sequence of three nucleotides in messenger RNA that codes for a single amino acid.

Anticodon: A sequence of three nucleotides on the transfer RNA molecule that recognizes and pairs with a specific codon on a messenger RNA molecule; helps control the sequence of amino acids in a growi . . . View Full Definition

Thecodonts: An informal term for a variety of Permian and Triassic reptiles that had teeth set in individual sockets. Small, bipedal thecodontians are the probable ancestors of dinosaurs.

Degenerate Codon: A codon that specifies the same amino acid as another codon.

Stop Codon: The codon on a messenger RNA molecule where protein synthesis stops.

Termination Codon: One of three three-base sequences that initiate termination of the protein synthesis process. See stop codon.

Start Codon: The codon (AUG) on a messenger RNA molecule where protein synthesis begins.

Initiation Codon (AUG): Three-base sequence on the messenger RNA that codes for the amino acid methionine; the start command for protein synthesis.

Open Reading Frame (ORF): The sequence of dna or rna located between the start-code sequence (initiation codon) and the stop-code sequence (termination codon).

Genetic Code: The linear series of nucleotides, read as triplets, that specifies the sequence of amino acids in proteins. Each triplet specifies an amino acid, and the same codons are used for the same am . . . View Full Definition