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 Pacific Blue
Pacific Blue® (Pac Blue, PacBlue) is a blue-emitting organic fluorophore that can be excited by the 405 nm Violet laser and captured with a 450/50 nm bandpass filter. Pacific Blue has an excititaion peak at 401 nm and an emission peak at 452 nm.