U.S. National Library of Medicine
ABO Blood-Group System
The major human blood type system which depends on the presence or absence of two antigens A and B. Type O occurs when neither A nor B is present and AB when both are present. A and B are genetic factors that determine the presence of enzymes for the synthesis of certain glycoproteins mainly in the red cell membrane.
The numerical value of abo blood-group system in Chaldean Numerology is: 7
The numerical value of abo blood-group system in Pythagorean Numerology is: 1
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"abo blood-group system." Definitions.net. STANDS4 LLC, 2017. Web. 21 Jul 2017. <http://www.definitions.net/definition/abo blood-group system>.