Why does the mutation G17736A/Val107Val (silent) in the F9 gene cause mild haemophilia B in five Swedish families?
The mutation G17736A/Val107Val (silent) was found in five of a total of 86 families with haemophilia B in Sweden. It is unlikely that five families with analogous clinical expression will have the same polymorphism, which is not found in other patients or normal subjects, or that they will be the only families in the population without any other causative mutation. All affected individuals in the
