Flow Cytometry: Lightning-Link Rapid Atto 700 Antibody Labeling Kit [354-0010] - Mouse anti-human CD3 was conjugated with Atto 700 using Lightning-LinkĀ® Rapid 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).