Kubota K, Katoh H, Muguruma K, Koyama K. Characterization of a surface membrane molecule expressed by natural killer cells in most inbred mouse strains: monoclonal antibody C9.1 identifies an allelic form of the 2B4 antigen. Immunology 1999; 96:491–7.
In this article the authors reported that C9.1 mAb stains a minor subset of B cells in addition to NK cells. However, in subsequent studies we could not confirm the reactivity of C9.1 mAb to B cells. Thus, we would like to retract the statements concerning the extra reactivity of C9.1 mAb to B cells. The authors apologize for this error and any confusion that may have resulted.