About CD8a
The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. The CD8 antigen acts as a coreceptor with the T-cell receptor on the T lymphocyte to recognize antigens displayed by an antigen presenting cell in the context of class I MHC molecules. The coreceptor functions as either a homodimer composed of two alpha chains or as a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains. This gene encodes the CD8 alpha chain. Multiple transcript variants encoding different isoforms have been found for this gene. The major protein isoforms of this gene differ by the presence or absence of a transmembrane domain and thus differ in being a membrane-anchored or secreted protein. [provided by RefSeq, May 2020]

About Vio Bright R720
Vio® Bright R720 and Vio® R720 have an excitation peak at 695 nm and an emission peak at 720 nm, which means that these dyes are optimally excited by the 640 nm red laser while the emitted light is collected by the channel with a 725/40 bandpass filter. Miltenyi Biotec's proprietary multimerization technology allows for Vio® Bright R720 to be nearly twice the brightness of Vio® R720, so this choice of fluorophore offers flexibility in your panel design in flow cytometry. Spectrally, Vio® Bright R720 is comparable to R700 from BD Biosciences.