This mouse IgG2b, κ isotype control is a monoclonal antibody, clone 27-35, that is specific for the dansyl (5-[dimethylamino] naphthalene-1-sulfonyl) hapten. The dansyl (DNS) hapten is not expressed on human cells or human cell lines. The 27-35 immunoglobulin was selected as an isotype control following testing that demonstrated low background staining on a variety of mouse and human tissues.
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).