What are the mRNA codons for phenylalanine?

By Forinfos - 07/01/2026 - 0 comments

As shown on the Nature.com website, the mRNA codons for phenylalanine are UUU and UUC. More than one mRNA codon translates to phenylalanine because there are 64 possible codons, but only 20 amino acids are used in the translation of human proteins.

According to notes on the SDSU website, most of the codons that code for the same amino acids (UUU and UUC for phenylalanine as an example) typically differ based on the third and last base. This is called the "wobble" site, because anticodons can also include the base "I" or inosine that matches with either A, U, or C in the mRNA codon.

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