very early activating antigen

synonym: CD69
https://doi.org/10.1351/goldbook.13778
Specific antigen expressed on lymphocytes very soon after activation by phorbol myristate acetate (PMA).
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1259 [Terms] [Paper]