The information is carried in the middle structure of the DNA.
The 'rungs' between the two sides of the molecule are pairs of smaller molecules called nitrogenous base pairs, or nucleobases. There are 4 different bases, Adenine(A), Thymine(T), Cytosine(C), and Uracil(U). Each pairs up to a specific other base(A to T and C to U), and the order of which these bases are 'coded' to produce specific molecules that the cell will produce.