The 11F2 monoclonal antibody specifically reacts with a framework epitope of the γ/δ TCR. The γ/δ TCR is a heterodimeric glycoprotein that is noncovalently associated with the CD3 antigen complex. The γ and δ TCR chains are composed of constant and variable regions, each encoded by distinct gene segments. The γ chain forms either disulfide-linked or non-disulfide-linked heterodimers with the δ-subunit. TCR γ/δ is present on a minor subset of T lymphocytes in peripheral blood, thymus, spleen, and lymph node. TCR γ/δ-positive T lymphocytes comprise 1% to 9% of normal peripheral blood lymphocytes and less than 2% of normal thymocytes. The 11F2 antibody is mitogenic for γ/δ-TCR-bearing T lymphocytes.
This antibody is conjugated to BD Horizon™ BV605 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max of 407-nm and Em Max of 602-nm, BD Horizon BV605 can be excited by a violet laser and detected with a standard 610/20-nm filter set. BD Horizon BV605 is a tandem fluorochrome of BD Horizon BV421 and an acceptor dye with an Em max at 605-nm. Due to the excitation of the acceptor dye by the green (532 nm) and yellow-green (561 nm) lasers, there will be significant spillover into the PE and BD Horizon PE-CF594 detectors off the green or yellow-green lasers. BD Horizon BV605 conjugates are very bright, often exhibiting brightness equivalent to PE conjugates and can be used as a third color off of the violet laser.