Reacts with CD16b, a glycosyl phosphatidyl inositol-anchored (GPI) protein expressed on human neutrophils. Human CD16 is the low affinity Fc gamma receptor III (Fc gamma RIII) and shows two distinct forms coded by two linked genes. One form is CD16a, a polypeptide-anchored form (Fc gamma RIIIA), present on natural killer cells and macrophages. The other form is CD16b the GPI-anchored form, Fc gamma RIIIB, found on human neutrophils. CD16b is polymorphic and the two codominant alleles are referred to as Neutrophil Antigen 1 (NA1) and Neutrophil Antigen 2 (NA2). Clone CLBgran11.5 reacts with neutrophils expressing the NA1 molecule. CD16b has been reported to participate in immune complex binding by resting neutrophils and also in neutrophil transendothelial migration by interacting with integrins during the inflammation response process.
The antibody was conjugated to BD Horizon™ BV421 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max of 407-nm and Em Max at 421-nm, BD Horizon BV421 can be excited by the violet laser and detected in the standard Pacific Blue™ filter set (eg, 450/50-nm filter). BD Horizon BV421 conjugates are very bright, often exhibiting a 10 fold improvement in brightness compared to Pacific Blue conjugates.