Disclosed herein are heteromeric molecules comprising two or more different pathogen associated molecular patterns (PAMPs), wherein the two or more PAMPs are linked together with discrete, linear inter-PAMP spacing. Also disclosed are immunogenic compositions comprising the heteromeric molecules and related methods of stimulating an immune response in vivo in a subject or ex vivo comprising administering the immunogenic composition to cells. Also disclosed is a method of synthesizing an immunostimulant comprising: identifying 2 or more different PAMPS, covalently linking the 2 or more different PAMPS together, varying spacing between the 2 or more different PAMPs, and testing the effect of spacing between the 2 or more different PAMPS to identify an optimal spacing that results in immune stimulation.