Flow Cytometry: Lightning-Link PerCP-Cy5.5 Antibody Labeling Kit [763-0010] - Mouse anti-human CD3 was conjugated with PerCP/Cy5.5 using Lightning-LinkĀ® kit. The conjugated antibody was then used to stain human peripheral blood lymphocytes, followed by analysis with flow cytometry. (Blue line - negative control; red line - positive staining).