Thrombosis and Haemostasis, Table of Contents Thromb Haemost 1961; 6(02): 215-223DOI: 10.1055/s-0038-1654554 Originalarbeiten — Original Articles — Travaux Originaux Schattauer GmbH Purification of Factor IX or its Precursor Isolation of a Hageman-PTA Fraction[*] E. T Yin 1 Coagulation Laboratory (Prof. F. Koller) of the Department of Medicine (Prof. P. H. Rossier) Kantonsspital, University of Zürich, Switzerland , F Duckert 1 Coagulation Laboratory (Prof. F. Koller) of the Department of Medicine (Prof. P. H. Rossier) Kantonsspital, University of Zürich, Switzerland › Author Affiliations Recommend Article Abstract Buy Article Summary A purification method is described which allows the isolation of two active fractions: Hageman factor — PTA fraction and factor IX or IX precursor fraction. These two fractions are characterized and some of their properties are indicated. Full Text References References (1) Bachmann F, Duckert F, Koller F. The Stuart-Prower Factor Assay and Its Clinical Significance. Thromb. Diath. haem. 2: 24 1958; (2) Duckert F, Flückiger P, Isenschmid H, Matter M, Vogel-Meng J, Koller F. A Modification of the Thromboplastin Generation Test. Acta haemat. (Basel) 12: 197 1954; (3) Duckert F, Loeligeret A, Koller F. Sur un Nouveau Facteur de la Coagulation, le Facteur VII. Sa Purification. Helv. chim. Acta 34: 2431 1951; (4) Duckert F, Yin E. T, Straub W. Separation and Purification of the Blood Clotting Factors by means of Chromatography and Electrophoresis. Preparative Methods. Proc. of the 8th Colloquium, Bruges 1960, Protides of the Biological Fluids. 41 Elsevier; Amsterdam: 1961 (5) Geiger M, Duckert F, Koller F. Quantitative Bestimmungen von Faktor VIII und IX bei Blutersippen. 413 5th Cong. Europ. Soc. Plaemat. Freiburg i. B. 1955. Springer; Fieidelberg: 1956 (6) Koller F, Loeliger A, Duckert F. Experiments on a New Clotting Factor. Factor VII. Acta haemat. (Basel) 6: 1 1951; (7) Yin E. T, Duckert F. The Formation of Intermediate Product I in a Purified System. Thromb. Diath. haem. 6: 224 1961;