very late activation antigen

initialism: VLA
https://doi.org/10.1351/goldbook.13779
T-cell surface antigen, named for its delayed appearance after T-cell activation; a member of the integrin superfamily involved in cell adhesion.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1259 [Terms] [Paper]