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Example titrations of the immunoglobulin (Ig)G reactivity of human serum samples; comparison of whole molecule BfUbb (square), Hubb (triangle) and peptide 1‐QVFIKNRYGWTI (cross). Initial dilution 1/100. Immunology laboratory test positive for (a) anti‐cardiolipin antibody and (b) anti‐tissue transglutaminase and endomysial antibody [standard deviation (s.d.)].
