Well, it is more about RNA than DNA when we talk about using DNA code to code for a protein.
In the RNA (complementary of the DNA)has a codon the UAGC that codes for a specific type amino acid by being have a complementary anticodon. The "partnership" of these two creates chain of amino acid that become later a protein.
I do not know if I answered your question correctly, as I do not know how far you went in the subject.
