RT Journal Article SR Electronic T1 Complement-Immunoglobulin Relation: Deficiency of C'lq Associated with Impaired Immunoglobulin G Synthesis JF Science JO Science FD American Association for the Advancement of Science SP 474 OP 475 DO 10.1126/science.163.3866.474 VO 163 IS 3866 A1 Kohler, Peter F. A1 Muller-Eberhard, Hans J. YR 1969 UL http://science.sciencemag.org/content/163/3866/474.abstract AB Concentration of the complement protein C'lq was determined immunochemically in serums of individuals with a wide variety of immunoglobulin abnormalities. A significant correlation was observed between decreased concentration of C'lq and deficient synthesis of immunoglobulin G; C'lq was particularly diminished in subjects with congenital, sex-linked (Bruton) agammaglobulinemia. In contrast, two to five times the normal concentration of C'lq was found in the serum of three patients with heavy chain disease (subtype immunoglobulin G3). No significant relation was found between C'lq and concentrations of immunoglobulins A and M.