May 2026 QQ: Proconvertin

Our May 2026 QQ is another “memory lane” quiz that asks, “What factor was once named proconvertin, stable factor, autoprothrombin I,  or serum prothrombin conversion accelerator (SPCA)? For space purposes, the stem is shortened to ‘Proconvertin or SPCA?‘ ” Click first on Posts to navigate to the QQ in the right column.

Corriveau DM, Plasma Proteins: Factors of the Hemostatic Mechanism. In Corriveau DM, Fritsma GA. Hemostasis and Thrombosis in the Clinical Laboratory. Lippincott 1988.