Bangs Simply Cellular® standard consists of a single population of antibody-coated microspheres (~7-9μm in diameter) of known Antibody Binding Capacity (ABC). The population is stained with the user's primary antibody and used in conjunction with a suitable Quantum™ MESF kit for determination of the antibody's effective Fluorophore : Protein (F/P) ratio. This standard may also be used to QC the fluorescence intensity of different antibody lots or clones. Simply Cellular® kits are available in three sizes: A (20 tests), B (100 tests), and C (280 tests). :