The BZ2E3 monoclonal antibody specifically binds to CCRL2 (C-C chemokine receptor-like 2) which is also known as Lipopolysaccharide-inducible C-C chemokine receptor (L-CCR/Lccr). CCRL2 is a chemokine receptor-like, 7-transmembrane protein that can bind CCL19 or the nonchemokine chemoattractant, chemerin/RARRES2. CCRL2 is expressed by a variety of cell types including mast cells, macrophages and some endothelial cells. CCRL2 appears to play various roles in regulating chemokine activities, e.g., by binding and internalizing excess local levels of the CCL19/MIP-3β chemokine. Alternatively, endothelial cell-expressed CCRL2 can bind and present the chemerin/RARRES2 chemoattractant to lymphoid cells that express the functional signaling receptor, CMKLR1, and promote their adhesion.
The antibody was conjugated to BD Horizon BUV615 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome with an Ex Max near 350 nm and an Em Max near 615 nm. BD Horizon Brilliant BUV615 can be excited by the ultraviolet laser (355 nm) and detected with a 610/20 filter and a 595 nm LP. Due to the excitation of the acceptor dye by the blue/yellow-green laser line, there may be significant spillover into channels detecting PE-CF594 like emissions (eg, 610/20-nm filter).