The JOVI.1 monoclonal antibody recognizes an epitope common to a large proportion of human CD4+ or CD8+ T lymphocytes that express the T cell receptor beta chain (TCRβ). The antibody was generated from a mouse immunized with transgenic mouse lymphoid cells that expressed the rearranged human Vβ3-Cβ1 TCR chain derived from the cloned human HA1.7 T helper cell. This antibody reacts with TCR-Cβ1+ T cells and one of several different TCRβ V regions, but not with TCR-Cβ2+ T cells. JOV1.1 antibody reportedly recognized several Cβ1 TCR expressing cell lines or clones including Jurkat, CH7C17, and HA1.7 cells. The JOVI.1 antibody can be used to stimulate proliferative responses by JOVI.1-positive T cells. It can also reportedly be used for immunoprecipitation and to stain JOVI.1+ T cells in frozen tissue sections.
The antibody was conjugated to BD Horizon BV711 which is part of the BD Horizon Brilliant™ Violet family of dyes. This dye is a tandem fluorochrome of BD Horizon BV421 with an Ex Max of 405-nm and an acceptor dye with an Em Max at 711-nm. BD Horizon BV711 can be excited by the violet laser and detected in a filter used to detect Cy™5.5 / Alexa FluorTM 700-like dyes (eg, 712/20-nm filter). Due to the excitation and emission characteristics of the acceptor dye, there may be moderate spillover into the Alexa Fluor 700 and PerCP-Cy5.5 detectors. However, the spillover can be corrected through compensation as with any other dye combination.