About IL-21
This gene encodes a member of the common-gamma chain family of cytokines with immunoregulatory activity. The encoded protein plays a role in both the innate and adaptive immune responses by inducing the differentiation, proliferation and activity of multiple target cells including macrophages, natural killer cells, B cells and cytotoxic T cells. Dysregulation of this gene plays a role in multiple immune-mediated diseases including lupus, psoriasis and chronic inflammatory diseases. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

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.