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| MNSs Blood-Group System Blood-Group System, MNSs | Blood-Group Systems, MNSs | MNSs Blood Group System | MNSs Blood-Group Systems | System, MNSs Blood-Group | Systems, MNSs Blood-Group A system of universal human blood group isoantigens with many associated subgroups. The M and N traits are codominant and the S and s traits are probably very closely linked alleles, including the U antigen. This system is most frequently used in paternity studies. |