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The Curious, Missing Blood Factor

August 2, 2014

Time No Longer

If you have ever researched the Rhesus blood grouping system, you probably already know that there is something mighty peculiar about the rhesus negative status. The Rhesus blood grouping system is differentiated from the ABO system, dealing with separate groups of antigens.

First, to give some foundation information on blood grouping: the ABO blood grouping system reflects whether a person has the antigen “A”, or the antigen “B”, or has both, or neither. “O” simply stands for zero, or “null”, having no A or B antigens.

The Rhesus blood group system contains some 50 different antigens, but the one of great importance is the “D” antigen. It is the D which determines the rh status of an individual.

This, the most immunogenic of the Rhesus factors, is key in knowing what individuals can donate blood or tissue to another without complications. The presence of a D antigen will not be…

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