About CD4
This gene encodes the CD4 membrane glycoprotein of T lymphocytes. The CD4 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 II MHC molecules. The CD4 antigen is also a primary receptor for entry of the human immunodeficiency virus through interactions with the HIV Env gp120 subunit. This gene is expressed not only in T lymphocytes, but also in B cells, macrophages, granulocytes, as well as in various regions of the brain. The protein functions to initiate or augment the early phase of T-cell activation, and may function as an important mediator of indirect neuronal damage in infectious and immune-mediated diseases of the central nervous system. Multiple alternatively spliced transcript variants encoding different isoforms have been identified in this gene. [provided by RefSeq, May 2020]

About StarBright Yellow 720
StarBright Yellow 720 (SBY720) Dye is a bright 561 nm excitable dye with a unique and narrow emission. It can be used in place of PE-Cy5.5 and PE-A700 in multicolor panels as it is brighter, has reduced 488 nm excitation, and is fixable in PFA and alcohol-based buffers without loss of signal or changes to the spectra. Furthermore, as it is not a traditional tandem dye it is not prone to changes in emission over time due to acceptor and donor uncoupling, giving you reproducible data. Like all StarBright Dyes, SBY720 can be multiplexed with other StarBright Dyes or other fluorophores without the need for a special buffer and can be premixed in a panel and stored at 4⁰C for over a month without changes to staining.