Which of the following chemical nature makes a better antigen?
Antigens are usually peptides, polysaccharides or lipids. In general, molecules other than peptides (saccharides and lipids) qualify as antigens but not as immunogens since they cannot elicit an immune response on their own. Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:88
Lipids
Nucleic acids
Polysachharides
Proteins
Immunology