title: Standardization of prekallikrein activator (PKA): the 1st British reference preparation for PKA.
abstract: A collaborative study on prekallikrein activator (PKA) has been carried out involving four laboratories for the purpose of establishing a British reference preparation for PKA. Samples of two plasma protein fractions (PPF) were assayed against participants' own supplies of the Bureau of Biologics Reference Preparation No. 2 (BoB 2). There was good agreement on the relative PKA activities of the two preparations. One of the preparations, coded 79/572, was established as the 1st British Reference Preparation for Prekallikrein Activator, with an assigned potency of 78.9 units/ml.
mesh_terms: D005174:Factor XII / Q000032:analysis*; D015956:Factor XIIa; D010446:Peptide Fragments / Q000032:analysis*; D012015:Reference Standards; D006113:United Kingdom
chemical_list: D010446:Peptide Fragments; D005174:Factor XII; D015956:Factor XIIa