The Redelberger antigen Rba

A new low frequency antigen, Rba, has been found in three blood donors. Studies on their families show that the antigen is inherited as a Mendelian autosomal dominant character. Rba segregates independently from ABO, MNSs P1, Rh, Kell, Duffy, Kidd, ACP1 and PGM1. Anti-Rba is not common in sera containing multiple antibodies ot low frequency antigens.