This is a hypomorphic allele; in hemizygous males, heterozygous females, and homozygous females, the activity level in blood is ~33%, ~65%, and ~29% of normal, respectively. The mutation has been identified as the deletion of exon 6 (159 base pairs). (J:82809, J:89396)
Legend:
cx: complex: > 1 genome feature ot: other: hemizygous, indeterminate,... (F): Female
(M): Male
N: normal phenotype
(#): related diseases count