Appendix 16. Discovery of B(A) phenotype

 

The B(A) phenotype was discovered after murine monoclonal anti-A and anti-B antibodies were introduced as anti-A and anti-B reagents. Treacy and Stroup reported in 1987 that some of the RBCs previously typed as B reacted weakly with certain lots of murine monoclonal anti-A antibodies. They named the phenotype B(A).