About PD-1
Programmed cell death protein 1 (PDCD1) is an immune-inhibitory receptor expressed in activated T cells; it is involved in the regulation of T-cell functions, including those of effector CD8+ T cells. In addition, this protein can also promote the differentiation of CD4+ T cells into T regulatory cells. PDCD1 is expressed in many types of tumors including melanomas, and has demonstrated to play a role in anti-tumor immunity. Moreover, this protein has been shown to be involved in safeguarding against autoimmunity, however, it can also contribute to the inhibition of effective anti-tumor and anti-microbial immunity. [provided by RefSeq, Aug 2020]

About RealBlue 780
BD Horizon RealBlue™ 780 (RB780) is part of BD's new product line of laser-specific fluorochromes which are designed to minimize cross laser excitaiton. This fluorochrome has a maximum excitation wavelength of 488nm and a maximum emission wavelength of 780nm. While RB780 is excited by the 488nm blue laser, it offers miminal cross-laser excitation off of the 561nm yellow/green laser. It is designed for use in Flow Cytometry and Spectral Flow Cytometry.