| specific antigen | 1.18 | P.S.A. stands for prostate specific antigen. | ||
| prostate antigen | 0.86 | P.S.A. stands for prostate specific antigen. | ||
| protective antigen | 0.86 | One is called protective antigen, so named because it is used to make anthrax vaccine. | ||
| surface antigen | 0.66 | Those types, known as serotypes, carry different surface antigens. | ||
| foreign antigen | 0.33 | Unanue then showed that the foreign antigens are peptides. | ||
| particular antigen | 0.26 | The donor can produce T cells targeted specifically against a particular antigen, Dazzi said in a telephone interview. | ||
| viral antigen | 0.26 | HBcAg was usually the first viral antigen to be detected by immunohistochemistry. |