Many genetically defined ABO subgroups exhibit characteristic flow cytometric patterns.
BACKGROUND: A flow cytometric method for detection of low levels of A/B antigen had been developed previously in our laboratory. The aim of this study was to investigate if this approach could be utilized to characterize different ABO subgroups and constitute a useful tool in a reference laboratory. STUDY DESIGN AND METHODS: Blood samples causing ABO discrepancies (n = 94) by routine serology were
