MspI polymorphic site within the Factor IX gene

Abstract
We have localized the position of the MspI polymorphic site that exists within the factor IX gene. The location of the MspI polymorphic site is within intro D, 1.9 kb upstream from the beginning of exon V and 4 kb downstream from a known polymorphic TaqI site. The use of a specific genomic probe simplifies the interpretation of the MspI polymorphism by reducing the number of non-overlaping DNA fragments to three bands; 2.4, 3.4, and 5.8 kb.