We found a case of Ael for the first time in Korea. The patient was 28-year-old woman admitted for the delivery of her first baby. Patient's red cells were typed as O, while the serum typing was A. The red cells were agglutinated by anti-H, but
not
agglutinated by anti-A1 or anti-AB. Adsorption of anti-A by patient's RBC was confirmed on the adsorption-elution test. In the saliva, only H substance was demonstable. A substance was not demonstrated either in the serum or in the saliva. A
transferase
was not demonstrated in patient's serum. One of the patient's sister and her daughter, and the patient's son also had same Ael phenotype.
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