About CD5
This gene encodes a member of the scavenger receptor cysteine-rich (SRCR) superfamily. Members of this family are secreted or membrane-anchored proteins mainly found in cells associated with the immune system. This protein is a type-I transmembrane glycoprotein found on the surface of thymocytes, T lymphocytes and a subset of B lymphocytes. The encoded protein contains three SRCR domains and may act as a receptor to regulate T-cell proliferation. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Oct 2016]

About PE-Cy5.5
PE-Cyanine®5.5 (PE-Cy5.5) is a red-emitting tandem fluorophore that combines phycoerythrin (PE) and Cy5.5. The donor molecule, PE can be excited by the 488-nm blue, 532-nm green, or 561-nm yellow-green laser and and transfers energy to the acceptor molecule, Cy5.5. PE-Cy5.5 has an excitation peak at 496 nm and an emission peak at 695 nm.