Interaction of immunoglobulins and lipids in human gallbladder bile

The lipoprotein complex from human gallbladder bile was challenged with anti-IgA and anti-IgG antisera in order to determine whether the apolipoprotein complex isolated from the detergent-free form of bile lipoprotein contains IgA and IgG. The apolipoprotein complex indeed crossreacts with anti-IgA and anti-IgG. In addition, the interactions of IgA and IgG with lipids were studied by ultracentrifugation and gel chromatography to determine whether these interactions occur in human bile.