In this section, we discuss in detail the different types of antigens that we can target. In particular, we discuss the advantages and disadvantages of using peptide sequences versus full length proteins. Because peptide antigens are such popular targets, we also discuss in detail the considerations that go into selecting an ideal peptide target from the full length protein sequence. Specific information for preparing a full length protein is also in this section, with a specific page dedicated to how to send us a gel band protein antigen. Lastly, we discuss why we always combine any antigen with an adjuvant and what specific benefits are provided by the AdjuLite™ adjuvant that we have developed and use for all of our custom antibody projects.