The diagram below shows the mRNA codes that corresponds to amino acid and stop codons. Read the diagram from the center outwards. For example, the mRNA code UAC corresponds to the amino acid tyrosine.

The genetic code represents which amino acid corresponds to each codon. The first nucleotide of the triplet is represented in the center, and then from the corresponding one outwards.
GCG = Alanine
GAU = Asparagine
CAA = Glutamine