The 2.11 monoclonal antibody recognizes the Vγ1.1 chain of the heterodimeric γδ T-cell receptor (TCR γδ) expressed by T lymphocytes and NK-T cells. It does not react with TCR αβ-bearing T cells. TCR γδ associates with CD3 molecules to form the TCR γδ/CD3 complex that mediates antigen recognition and can transduce intracellular signals leading to T cell responses. The Vγ1.1 TCR is also known as Vγ1 TCR. The Vγ1.1 variable region TCR gene segment primarily rearranges to join the Jγ4 and Cγ4 TCR gene segments. TCR Vγ1-expressing cells represent a major population of TCR γδ cells in the adult mouse thymus, peripheral lymphoid tissues, and different epithelia. They constitute a minor population of TCR γδ-positive T cells during fetal and early postnatal life.
The antibody was conjugated to BD Horizon BV421 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max of 407-nm and Em Max at 421-nm, BD Horizon BV421 can be excited by the violet laser and detected in the standard Pacific Blue™ filter set (eg, 450/50-nm filter). BD Horizon BV421 conjugates are very bright, often exhibiting a 10 fold improvement in brightness compared to Pacific Blue conjugates.