Prostaglandin F2a/BSA is an antigen-adjuvant conjugate formed by the conjugation of Prostaglandin F2a with Bovine Serum Albumin (BSA). By conjugating the antigen with a protein adjuvant , the production of antigen-specific antibodies in vaccine models can be enhanced. The conjugate does not affect protein folding or disrupt major epitopes and can enhance cross-presentation as well as the generation of antigen-specific T cells.