ABO blood group system

https://doi.org/10.1351/goldbook.12828
System of antigens expressed on erythrocytes and used for typing human blood for transfusion.
Note: Individuals who do not express A or B antigens on their erythrocytes naturally form antibodies against them.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1116 [Terms] [Paper]