Compositions, methods of making, and methods of using, xenoantigen-displaying anticancer vaccines are described. In another broad aspect, there is provided herein a method of synthesizing an alkynefunctionalized composition of claim 1, comprising: deprotecting an ester comprising a Fmoc moiety to form a free acid; coupling the free acid of step (a) with an amine; and, removing the Fmoc moiety, and coupling the remaining moiety with palmitic acid to yield an alkyne-functionalized composition.