[Polymorphism of M, N Allele in MN Blood Group of Chinese Population].

Objective: To detect the base sequences of all exons and part of introns in the GYPA gene of the glycophorin GPA and to investigate the polymorphism of M, N alleles in Chinese population.

Methods: A total of 225 blood sample were randomly colleeted from unrelated Chinese volunteers and were detected by serology techniques. The primers were designed by self, the seguencing of GYPA gene related with sample exon 1-7 full length sequences of bases and intron-1-7 partial sequence was performed, the polymorphism of M, N gene mutation in mucleotide sequence was analysed.

Molecular genetic analysis for a novel Ael allele of the ABO blood group system.

The ABO blood group is the most important system in clinical transfusion medicine. Previous studies on the genetic base of the common ABO group and some rare ABO subgroups have suggested that the molecular genetic background of the ABO gene in the Chinese population has specific character. In this study, we carried out a molecular genetic analysis of a family with an individual diagnosed as Ael subgroup by serological tests.

Identification of a novel B variant allele at the ABO locus in Chinese Han individuals with B subgroup.

We studied the molecular genetic background of the B subgroup in the Chinese Han population and identified a novel allele at the ABO locus. Ten control samples from randomly selected blood donors of normal B phenotype and 6 samples from individuals diagnosed as B subgroup by serological tests were genotyped by PCR-SSP and direct DNA sequencing at exons 6 and 7 of the ABO gene. Exons 6 and 7 and the intervening intron 6 of B alleles from the 6 B subgroup samples were analyzed by cloning and haplotype-sequencing.