In type I von Willebrand disease, the whole series of von Willebrand factor multimers is present in plasma. However, in type II von Willebrand disease qual itative defects of the von Willebrand factor proteins exist. Using a novel semidry horizontal gel electrophoresis ap paratus combined with a discontinuous buffer system, high-resolution analysis of von Willebrand factor multi meric composition is possible. When applied in clinical practice, this technique allows for easy discrimination be tween type I and type II defects.
Ruggeri ZM, Zimmerman TSVariant von Willebrand's disease: characterization of two subtypes by analysis of multimeric composition of factor VIII/von Willebrand factor in plasma and platelets. J Clin Invest1980;65:1318.
2.
Ruggeri ZM, Zimmerman TSvon Willebrand factor and von Willebrand disease. Blood1987;70:895.
3.
Chrambach A., Jovin TMAnalytical and preparative polyacrylamide gel electrophoresis: an objectively defined fractionation route, apparatus and procedures. In: Catsimpoolas N, ed. Methods of protein separation , vol. 2. New York: Plenum Publishing, 1976:27-144.