Types stnthetic antigens?

Artificial and synthetic antigens are one in the same.

Synthetic antigens are often valuable tools in immunological research. They are usually linear or branched polypeptides, prepared by polymerization of N-carboxy--amino acid anhydrides or by polymerization of defined oligopeptides. Owing to their great variability, these simple antigens allow a systematic study of the chemical and physical parameters involved in immunogenicity, i.e. the ability of a substance to initiate an immune response in higher animals. The study of very simple synthetic antigens made possible the first detailed analysis of genetic factors controlling the immunogenicity of a substance. The results have led to a better understanding of many immunological phenomena, and have helped to explain the complex processes initiated by antigens that lead to a specific immune response.