CD Antigens

CD antigens are cell surface proteins expressed on leukocytes and various other cells during their differentiation, maturation, and activation processes. They serve as important markers for cell typing, functional identification, and disease diagnosis, playing a key role in immunology and cancer research. Recombinant CD antigen proteins are produced by introducing the target CD antigen gene into expression systems such as E. coli, yeast, insect cells, or mammalian cells using genetic engineering techniques. After induced expression, they are isolated and purified, retaining their native conformation and biological activity. These proteins often carry tags to facilitate purification and detection. With high purity, good batch-to-batch consistency, and scalability for large-scale production, they are widely used in immune mechanism exploration, antibody drug screening, validation of cell therapy targets such as CAR‑T, and the development of in vitro diagnostic reagents. They are indispensable core tool proteins in immunology, biomedicine, and clinical diagnostics.