https://doi.org/10.1351/goldbook.13021
Autoantibody that reacts optimally at low temperatures (\(\pu{{0}{-}{5} ^{\circ}C}\)) with surface antigens of erythrocytes.
Note: It mediates autoimmune hemolytic anemia by either cold agglutinins (cold hemagglutinin disease) or cold hemolysins (paroxysmal cold hemoglobinuria).