Cellular Technology (CTL) is a biotechnology company focused on the development of standardized tools for specializing in cellular immune assays. It focuses on cryopreserved peripheral blood mononuclear cells (PBMCs), loss-free cryopreservation of clinical samples as well as in T-cell and and B-cell monitoring. Additionally, the company offers ImmunoSpot kits, analyzers, serum-free media, and other products.