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Logo of jclinpathJournal of Clinical PathologyVisit this articleSubmit a manuscriptReceive email alertsContact usBMJ
J Clin Pathol. 1975 April; 28(4): 332–336.
PMCID: PMC475701

A new method for the assay of factor XI in plasma and the preparation and use of a new artificial substrate


An improved method for the one-stage assay of factor XI in plasma has been proposed; it is reproducible and compares well with an old, established method.

A short investigation into the preparation and use of artificially prepared factor XI-deficient plasma has been carried out: this substrate can be used as an alternative to the congenitally deficient substrate.

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