Search results
Each three-letter sequence of mRNA nucleotides corresponds to a specific amino acid, or to a stop codon. UGA, UAA, and UAG are stop codons. AUG is the codon for methionine, and is also the start codon. To see how the codon table works, let’s walk through an example.
Cells decode mRNAs by reading their nucleotides in groups of three, called codons. Each codon specifies a particular amino acid, or, in some cases, provides a "stop" signal that ends translation. In addition, the codon AUG has a special role, serving as the start codon where translation begins.
mRNA Codon/Amino Acid Chart. First Base. Second Base. U. C. A. G. UUU. UUC. UUA. UUG. CUU. CUC. CUA. CUG. AUU. AUC. AUA. AUG. GUU. GUC. GUA. GUG. U. Phenylalanine (Phe) Leucine (Leu) Isoleucine (Ile) Start Methionine (Met) Valine (Val) UCU. UCC. UCA. UCG. CCU. CCC. CCA. CCG. ACU. ACC.
Each group of three bases in mRNA constitutes a codon, and each codon specifies a particular amino acid (hence, it is a triplet code). The mRNA sequence is thus used as a template to...
Table \(\PageIndex{1}\): Codon Chart. To find the amino acid for a particular codon, find the cell in the table for the first, second, and third bases of the codon. Once you have found the codon, you can find the corresponding amino acid in the adjacent cell on the right side of the codon cell.
The chart seen in Figure \(\PageIndex{3}\) can be used to translate an mRNA sequence into an amino acid sequence. For example, the codon UUU will always cause the insertion of the amino acid phenylalanine (Phe), while the codon UUA will cause the insertion of leucine (Leu).
Sep 15, 2023 · The codon chart outlines the various codon combinations and their corresponding amino acids. To use the codon chart, for example, if the first codon position contains uracil (U), the second contains adenine (A), and the third contains cytosine (C), the resulting codon, UAC, represents the amino acid tyrosine.
