Construct: Amino acid replacement: S55T. Amino acid replacement: G57A. These amino acid changes are to those that are found in the equivalent residues in βTub85D.
βTub56D::βTub85Dβ1-β2.iii, βTub85Dn has spermatid axoneme phenotype
The addition of βTub56D::βTub85Dβ1-β2.iii to βTub85Dn homozygotes leads to almost wild-type axoneme morphology in the testis - in distal sections however many axonemes lose any discernable organisation.