heterologous antigen

https://doi.org/10.1351/goldbook.13207
Antigen that reacts with an antibody other than the one whose formation it induced.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1175 [Terms] [Paper]