Divide your DNA sequence [from 1] into groups of three. Each triplet will encode an amino acid (a protein unit or building block). To decode a triplet sequence, find the first letter in the inner circle and work outwards to see which amino acid (a single-letter code; in the outermost ring) corresponds to your sequence. If the sequence encodes a ‘STOP’, the protein ends there. see en.wikipedia.org/wiki/Genetic_code Amino Acid Code A - Alanine C - Cysteine D - Aspartic Acid E - Glutamic Acid F - Phenylalanine G - Glycine H - Histidine I - Isoleucine K - Lysine L - Leucine M - Methionine N - Asparagine P - Proline Q - Glutamine R - Arginine S - Serine T - Threonine V - Valine W - Tryptophan T - Tyrosine See www.yourgenome.org/facts/what-does-dna-do Formerly at [1] www.yourgenome.org/downloads/function_finder_forweb.pdf via www.sanger.ac.uk and www.ebi.ac.uk [2] see also www.yourgenome.org/dgg/general/proteins/proteins_2.shtml