Kerry P J, Curtis A D, Thomas D P
Br J Haematol. 1985 Jun;60(2):345-52. doi: 10.1111/j.1365-2141.1985.tb07420.x.
A international collaborative study was carried out to establish an international standard for prekallikrein activator (PKA). The candidate material, coded 82/530, was assayed against the Office of Biologics (FDA) PKA reference preparation No. 2 (OoB 2) and the 1st British Reference Preparation for PKA. There was good agreement between participant laboratories on the relative PKA activity of the three preparations. Preparation 82/530 has been established by the World Health Organization as the 1st I.S. for PKA, with an assigned potency of 85 International Units per ampoule.
