Blood group serology reveals point mutation in ABO*BA.02 allele from pedigree analysis, indicating familial inheritance.
Blood group serology and molecular diagnostic techniques can accurately identify the rare B (A) 02 subgroup, pedigree analysis showed that the proband's BA.02 allele mutation came from her mother. Its allele was a point mutation of c.700C>G on the basis of ABO*B.01.
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Sun et al. (2025) studied this question.
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