The RMT2-26 monoclonal antibody specifically recognizes T cell immunoglobulin and mucin domain-2 (TIM-2) which is also known as T-cell membrane protein 2, TIMD-2, or Tim2. TIM-2 is an ~55 kDa type I transmembrane glycoprotein that is encoded by Timd2 (T cell immunoglobulin and mucin domain containing 2) which belongs to the immunoglobulin gene superfamily. TIM-2 contains extracellular IgV and mucin domains and a cytoplasmic region with a conserved tyrosine phosphorylation motif which is involved in transmembrane signaling. A human ortholog for mouse TIM-2 has not been identified. TIM-2 is reportedly expressed on B cells with higher levels on activated B cells and germinal center B cells, type-2 T helper (Th2) cells, oligodendrocytes, and epithelial cells in the kidney and liver. It may serve as a receptor for Semaphorin 4A (Sema4A) or the heavy chain of ferritin (H-ferritin). The RMT2-26 antibody can reportedly block the binding of H-ferritin to TIM-2.
The antibody was conjugated to BD Horizon™ BUV496 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome of BD Horizon BUV395 with an Ex Max of 348-nm and an acceptor dye with an Em Max at 496-nm. BD Horizon BUV496 can be excited by the ultraviolet laser (355 nm) and detected with a 515/30 nm filter with a 450LP. Due to the excitation of the acceptor dye by other laser lines, there may be significant spillover into the channel detecting BD Horizon V500 or BV510 (eg, 525/40-nm filter). However, the spillover can be corrected through compensation as with any other dye combination.