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 V450
V450 (Horizon V450) from BD Biosciences has an excitation peak at 406 nm and an emission peak at 450 nm. It is spectrally similar to eFluor™ 450 (ThermoFisher Scientific), Vio®Blue® (Miltenyi Biotec), Alexa Fluor™ 405 (ThermoFisher Scientific), Cascade Blue® (ThermoFisher Scientific), Pacific Blue (ThermoFisher Scientific), and ATTO 425 (ATTO-Tec)