Pacuszka T, Kościelak J, Seyfried H, Walewska I
Vox Sang. 1975;29(4):292-300. doi: 10.1111/j.1423-0410.1975.tb00510.x.
Pedigree studies and serological characterization of three cis AB families are presented. Serums of these persons exhibit strongly reduced activities of A gene-specified alpha-acetylgalactosaminyltransferase and only trace activities of B gene-dependent alpha-galactosyltransferase.