The HI29 monoclonal antibody specifically recognizes CD53. CD53 is a 35-42 kDa type III transmembrane glycoprotein that is expressed on all leucocytes, including plasma cells, but not on platelets, erythrocytes, and non-hematopoietic tissues. CD53 mediates signal transduction in monocytes and B cells. It has the broadest reactivity of all pan-leukocyte reagents used in immunohistology applications.
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.