Historic Overview of ABO System
•First discovered in:
•1900
•Person who discovered it:
•Karl Landsteiner
•Which groups were discovered:
•A, B, and O
•Landsteiner’s rule:
•Normal, healthy individuals possess ABO antibodies in their plasma to the ABO antigens absent from their red blood cells.
•Phenotypes present in ABO system:
•A, B, AB, and O