Explanation:
The codon AUG specifies the first amino acid, methionine, in protein synthesis also called as initiator. Inititing codon or start codon is the triplet of nucleotides, commonly adenine-uracil-guanine (AUG) or, in sometimes, guanine-uracil-guanine(GUG), that in eukaryotes and archea code for methionine and in bacteria code for formylmethionine, the first amino acids in all protein sequences.