The MEM-78 monoclonal antibody specifically recognizes CD10. CD10 is a 100 kDa type II transmembrane, glycosylated, zinc-containing metalloprotease. The CD10 antigen is also known as common acute lymphoblastic leukemia antigen (CALLA), neutral endopeptidase (NEP), gp100, and enkephalinase. The CD10 antigen is found on lymphocytes from samples with acute B-lymphoid leukemia. The CD10 antigen is also present on a wide variety of normal and neoplastic cell types including renal epithelia, fibroblasts, granulocytes, germinal center B lymphocytes, neutrophils, some T-cell leukemias, and some lymphoma, melanoma, and glioma cell lines. The CD10 antigen cleaves a number of biologically active peptides, including fMLP, and may modulate the chemotactic activity of fMLP towards neutrophils. Inhibition of the CD10 antigen promotes B-cell maturation, suggesting that it plays a role in B-cell development.
The antibody was conjugated to BD Horizon™ BUV661 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 661-nm. BD Horizon Brilliant BUV661 can be excited by the ultraviolet laser (355 nm) and detected with a 670/25 filter and a 630 nm LP. Due to cross laser excitation of this dye, there may be significant spillover into channels detecting APC-like emissions (eg, 670/25-nm filter).
Due to spectral differences between labeled cells and beads, using BD™ CompBeads can result in incorrect spillover values when used with BD Horizon BUV661 reagents. Therefore, the use of BD CompBeads or BD CompBeads Plus to determine spillover values for these reagents is not recommended. Different BUV661 reagents (eg, CD4 vs. CD45) can have slightly different fluorescence spillover therefore, it may also be necessary to use clone-specific compensation controls when using these reagents.