CD21 cell marker IVD, antibody

CD21 cell marker IVD antibodies are laboratory reagents designed to identify and measure CD21—a protein found on certain immune cells—within clinical samples. Clinically, these devices help diagnose, monitor, or research conditions like autoimmune disorders, infections, or immune system dysfunction by detecting CD21 expression levels in tissues or fluids.

These devices are typically in vitro diagnostics (IVDs) regulated as medical devices, often requiring compliance with standards like ISO 13485 or FDA 21 CFR Part 820. They’re commonly supplied as kits, ready-to-use reagents, or monoclonal/polyclonal antibodies for immunohistochemistry (IHC) or flow cytometry, depending on the intended diagnostic workflow.