Production of Human IgM Anti‐D in Tissue Culture by EB‐Virus‐transformed Lymphocytes

Abstract

Lymphocytes obtained from two donors who were producing anti-D were transformed with Epstein-Barr virus and grown in tissue culture. The lymphoblasts from both donors produced anti-D antibody, which agglutinated Rh-positive cells in saline. Both antibodies belonged to the IgM class; the concentration of anti-D in the culture fluid from one of the donors was approximately 250–500 ng/ml and bound firmly to Rh-positive cells with a functional affinity constant of approximately 1 × 10⁹ M⁻¹.