Two low ionic strength-dependent autoagglutinins were studied and found to have anti-Pr(1) specificity. This specificity was determined by studies with enzyme-treated and neuraminidase-treated human red blood cells (RBCs), animal RBCs and chemically-modified sialoglycoproteins, all suspended in a low ionic strength solution (LISS). Both IgM complement-binding cold agglutinins had a wide thermal
... [Show full abstract] range and caused in vitro hemolysis of some LISS-suspended RBCs at 37°C. Compatible blood was found for these patients by using techniques that did not employ LISS.