Costea N, Yakulis V, Heller P
Science. 1966 Jun 10;152(3728):1520-1. doi: 10.1126/science.152.3728.1520.
Cold agglutinins with specificity to I or to i antigens of humanadult or cord-blood erythrocytes produced during the course of Mycoplasma pneumoniae infection and infectious mononucleosis contain light chains of K and L types. However, cold agglutinin isolated from the serums of patients with chronic cold-agglutinin hemolytic anemia contains only type K light chains. The experimental evidence suggests that some cold agglutinins contain both types of light chains in the same molecule.