Separable from: TraxW151stop.
The "H813" chromosome is female sterile when homozygous and has a molecular lesion in the Trax gene (TraxW151stop). However the female sterility appears not to be due to an absence of functional Trax protein, but due to a separable lesion (fs(3)H813H813), since flies carrying the "H813" chromosome over a deficiency for Trax are fertile.