Provide the single letter code for the following peptide
Arg-Phe-Tyr-Cys-Asp-Trp-Gln-Ala-Glu-Glu-His-Lys

Single Letter Code

The system of representing amino acids or nucleotides using single letter abbreviations to simplify notation in sequences.

Peptide

Short chains of amino acid monomers linked by peptide (amide) bonds, playing crucial roles in biological functions.