NORMAL COUNTERPARTS TO BENCE-JONES PROTEINS: FREE L POLYPEPTIDE CHAINS OF HUMAN γ-GLOBULIN

Abstract
Low molecular weight yL-globulins isolated from normal human urine and plasma resemble the L polypeptide chains of normal human 7S y-globulin in their physi-cochemical and antigenic behavior. Both L chains and yL components have the thermosolubility and spectrofluorometric behavior of Bence-Jones proteins. It is suggested that yl globulins are free L chains and that they are normal counterparts to Bence-Jones proteins.