This antibody can be used for flow cytometry or for tissue staining. Optimal F/P ratios have been established for each conjugate to ensure maximum fluorescence with minimal background staining. Maximum excitation is at 495 nm and maximum emission is at 515 nm. This chain-specific antibody is produced specifically to distinguish between chains or classes of target immunoglobulins. This antibody is affinity-purified and treated by negative solid-phase adsorption to remove cross-reacting antibodies. This chain specific antibody has virtually no cross-reactivity with other immunoglobulin classes or other heavy or light chains.