polyclonal immunoglobulin productionmonoclonal immunoglobulinquantitative immunoglobulinsdifferent types of immunoglobulinsigg immunoglobulinsecretory immunoglobulinimmunoglobulin in colostrummost abundant immunoglobulinimmunoglobulin superfamilyelevated immunoglobulin aserum immunoglobulinige immunoglobulin