Epitope mapping is a method that is often employed to identify the antigen binding sites of an antibody. However, epitope mapping can also be used in other protein interactions with high affinity, including those with proteins, chemicals, and DNA. The Peptide Mapping Arrays provided use high-quality peptides that are chemically synthesized, thereby negating many of the steps and time required with the traditional approach that involves recombinant cloning, expression, and purification of different regions of the target gene.