The 134591 monoclonal antibody specifically recognizes CD159 antigen-like family member C (CD159c) which is also known as NKG2-C type II integral membrane protein or NKG2-C-activating NK receptor (NKG2C), or NK cell receptor C. CD159c (NKG2C) is a type II transmembrane glycoprotein that is encoded by KLRC2 (killer cell lectin like receptor C2) which belongs to the killer cell lectin-like receptor (KLR) family. CD159c (NKG2C) contains a C-type lectin domain in its extracellular region and is expressed by NK cells and some T cells. CD159c (NKG2C) can form a disulfide-bonded heterodimer with CD94 that non-covalently associates with DAP12 homodimers to form a functional signaling receptor complex. CD159c (NKG2C) binds to MHC class I HLA-E molecules on target cells to regulate NK cell activation.
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.