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 APC-Cy7
APC-Cy7 (APC-Cyanine 7) has an excitation peak at 650 nm and an emission peak at 785 nm, and is spectrally similar to APC-CF®750 (Biotium), APC-H7 (BD Biosciences), APC-eFluor™ 780 (Thermo Fisher Scientific), APC-Vio®770 (Miltenyi Biotec) and APC-Fire™ 750 (BioLegend). This dye is a member of the Cyanine® dye family, a trademark of GE heathcare.