Scientists find new set of blood types

INA – SOURCES
 
A group of scientists have described a newly discovered blood group. Besides the most commonly known blood type groups like A, B, O and Rh, there are dozens of others. This new group, named the Er blood group, is the 44th such blood group to be described. 
 
In total, there are five Er antigens in this group based on genetic variations in the Piezo1 protein, according to the study published in the journal Blood. The Piezo1 protein is found on the surfaces of red blood cells. 
 
Antibodies that match the Er antigens can attach to them and lead to immune cells attacking the mismatched cells. This can also happen in other cases where blood types are incompatible and why doctors and health care practitioners work to avoid mismatches. 
 
The Er antigen was discovered years ago, but this study is the first to describe different mutations of the antigen. This includes two versions of the antigen that were previously unknown.