M and N blood groups

M and N blood groups were discovered, adding to the known blood group types. This discovery is not useful in transfusion but useful for studying heredity and distinguishing between different human groups.
 Karl Landsteiner Austria 1927 M and N blood groups

M and N blood groups were discovered, adding to the known blood group types. This discovery is not useful in transfusion but useful for studying heredity and distinguishing between different human groups.