Abstract
Summary
Complement hemolytic activities of sera, obtained from umbilical cords at birth, were compared to those obtained from the corresponding mothers. The lower total activity of the cord specimens was correlated with a parallel decrease in all components. Anticomplementary substances could not be detected in cord samples. The reduced concentration of complement components in cord sera was correlated with reduced levels of alpha- and beta-globulins as determined by paper electrophoresis. It may be more than coincidental that 3 of the 4 components also migrate in this region.
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