The 5H9 monoclonal antibody specifically binds to the human form of the leukocyte common antigen (LCA), CD45RA. This clone also crossreacts with CD45RA expressed by peripheral blood lymphocytes, monocytes and some granulocytes from rhesus macaque, baboon, and cynomolgus monkeys. The observed frequency of CD45RA positive lymphocytes is higher in the non-human primate compared to what is seen with normal human donor lymphocytes.
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).