Abstract

Current research into the molecular biology of blood‐clotting factors suggests that the basis of inherited bleeding disorders may soon be understood. In addition, the expression of cloned genes for the factors in mammalian cell lines provides the hope of pure factors being available for replacement therapy, uncontaminated with the causative agents for Hepatitis and Acquired Immune Deficiency Syndrome (AIDS), identified in the blood products at present available. The recent findings on the molecular biology of several of the key blood clotting genes are described here.