The paternal mutation is a G -- > A transition located at the 5 ' donor splice site within intron 51 , designated IVS51 + 1G -- > A .
O O O O O B-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant O O O O O O O O O O O O O O B-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant I-SequenceVariant O