Jean-Claude Mani

Normal human serum contains natural antibodies reactive with autologous ABO blood group antigens.

S. Kaveri, M. Kazatchkine, J. Cartron, 1999, Blood.

Soluble CD21 (sCD21) forms biologically active complexes with CD23: sCD21 is present in normal plasma as a complex with trimeric CD23 and inhibits soluble CD23-induced IgE synthesis by B cells.

M. Kazatchkine, J. Bonnefoy, V. Frémeaux-Bacchi, 1998, International immunology.